[v5.15] INFO: task hung in add_transaction_credits
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syzbot
Apr 6, 2023, 10:01:54 AM4/6/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: d86dfc4d95cd Linux 5.15.106
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14e6621dc80000
kernel config: https://syzkaller.appspot.com/x/.config?x=dca379fe384dda80
dashboard link: https://syzkaller.appspot.com/bug?extid=ace3a2385e145b6600e7
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7ac78299f5d0/disk-d86dfc4d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b63c16a64aad/vmlinux-d86dfc4d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/815813a7f50b/bzImage-d86dfc4d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ace3a2...@syzkaller.appspotmail.com
INFO: task kworker/u4:6:1232 blocked for more than 143 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:6 state:D stack:18912 pid: 1232 ppid: 2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_writepages+0x114f/0x3d10 fs/ext4/inode.c:2810
do_writepages+0x481/0x730 mm/page-writeback.c:2364
__writeback_single_inode+0x15b/0xe30 fs/fs-writeback.c:1622
writeback_sb_inodes+0xbf0/0x1a50 fs/fs-writeback.c:1905
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1976
wb_writeback+0x465/0xc50 fs/fs-writeback.c:2081
wb_check_start_all fs/fs-writeback.c:2203 [inline]
wb_do_writeback fs/fs-writeback.c:2229 [inline]
wb_workfn+0x9f4/0x1130 fs/fs-writeback.c:2263
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2306
process_scheduled_works kernel/workqueue.c:2369 [inline]
worker_thread+0xdcf/0x1280 kernel/workqueue.c:2455
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
INFO: task jbd2/sda1-8:2926 blocked for more than 144 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8 state:D stack:23448 pid: 2926 ppid: 2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
jbd2_journal_commit_transaction+0xd9f/0x6bb0 fs/jbd2/commit.c:496
kjournald2+0x4ae/0x940 fs/jbd2/journal.c:213
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
INFO: task syz-executor.4:3624 blocked for more than 144 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:20920 pid: 3624 ppid: 1 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_dirty_inode+0x8b/0x100 fs/ext4/inode.c:5978
__mark_inode_dirty+0x2fd/0xd60 fs/fs-writeback.c:2439
generic_update_time fs/inode.c:1775 [inline]
inode_update_time fs/inode.c:1788 [inline]
touch_atime+0x3fa/0x680 fs/inode.c:1860
file_accessed include/linux/fs.h:2447 [inline]
iterate_dir+0x48a/0x570 fs/readdir.c:70
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f6b22c0ff77
RSP: 002b:00007ffeb04cf5f8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000055555641d810 RCX: 00007f6b22c0ff77
RDX: 0000000000008000 RSI: 000055555641d840 RDI: 0000000000000003
RBP: 000055555641d840 R08: 0000000000000030 R09: 00007f6b22ce8640
R10: 0000000000000231 R11: 0000000000000293 R12: ffffffffffffffb8
R13: 000055555641d814 R14: 0000000000000016 R15: 00007ffeb04d07f0
</TASK>
INFO: task syz-executor.4:30752 blocked for more than 144 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:20728 pid:30752 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_evict_inode+0x7dd/0x1100 fs/ext4/inode.c:254
evict+0x2a4/0x620 fs/inode.c:587
__dentry_kill+0x436/0x650 fs/dcache.c:582
dentry_kill+0xbb/0x290
dput+0x1f1/0x420 fs/dcache.c:888
__fput+0x5ec/0x890 fs/file_table.c:288
task_work_run+0x129/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0x6a3/0x2480 kernel/exit.c:872
do_group_exit+0x144/0x310 kernel/exit.c:994
get_signal+0xc66/0x14e0 kernel/signal.c:2889
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0af80 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2115d300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31005 blocked for more than 145 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:18968 pid:31005 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_write_begin+0x4b5/0x15f0 fs/ext4/inode.c:1196
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0af80 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2115d300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31009 blocked for more than 145 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:18712 pid:31009 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_write_begin+0x4b5/0x15f0 fs/ext4/inode.c:1196
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0af80 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2115d300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31037 blocked for more than 146 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:19224 pid:31037 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_write_begin+0x4b5/0x15f0 fs/ext4/inode.c:1196
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0af80 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2115d300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31040 blocked for more than 147 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:19256 pid:31040 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_write_begin+0x4b5/0x15f0 fs/ext4/inode.c:1196
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0b050 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2113c300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31041 blocked for more than 148 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:19032 pid:31041 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_write_begin+0x4b5/0x15f0 fs/ext4/inode.c:1196
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0b050 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2113c300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31043 blocked for more than 148 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:18808 pid:31043 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_dirty_inode+0x8b/0x100 fs/ext4/inode.c:5978
__mark_inode_dirty+0x2fd/0xd60 fs/fs-writeback.c:2439
generic_update_time+0x1cb/0x1e0 fs/inode.c:1775
inode_update_time fs/inode.c:1788 [inline]
file_update_time+0x3eb/0x460 fs/inode.c:1977
ext4_write_checks+0x24a/0x2c0 fs/ext4/file.c:247
ext4_buffered_write_iter+0xc6/0x380 fs/ext4/file.c:264
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0b050 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2113c300 R15: 0000000000022000
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c91b920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by kworker/u4:6/1232:
#0: ffff888013db4138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2279
#1: ffffc9000562fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2281
#2: ffff88814b1780e0 (&type->s_umount_key#32){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
#3: ffff88814b17abd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2687
2 locks held by getty/3272:
#0: ffff888023c34098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
2 locks held by syz-executor.2/3620:
2 locks held by syz-executor.4/3624:
#0: ffff88805ba0b5c8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: iterate_dir+0x10a/0x570 fs/readdir.c:55
#1: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2447 [inline]
#1: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: iterate_dir+0x48a/0x570 fs/readdir.c:70
1 lock held by syz-executor.4/30752:
#0: ffff88814b178650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1742 [inline]
#0: ffff88814b178650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1859 [inline]
#0: ffff88814b178650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x375/0x1100 fs/ext4/inode.c:243
2 locks held by syz-executor.4/31005:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804dcb49b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804dcb49b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31009:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804d4a49b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804d4a49b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31037:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff888070c95da8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888070c95da8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31040:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804cbad3b0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804cbad3b0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31041:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804f00a1d8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804f00a1d8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31043:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804f0097e0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804f0097e0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31044:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88805231f198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88805231f198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31045:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88803851bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88803851bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31046:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804dd13fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804dd13fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31047:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804d3bbfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804d3bbfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31048:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804d6c5da8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804d6c5da8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31049:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804d6c3fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804d6c3fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31050:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804f00abd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804f00abd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31051:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880522821d8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880522821d8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31052:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff888052280de8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888052280de8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31053:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880522803f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880522803f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31054:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff888052282bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888052282bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31055:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff888052283fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888052283fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31056:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880522817e0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880522817e0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31057:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880378883f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880378883f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31058:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88803788f198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88803788f198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31061:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88803788bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88803788bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31062:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804d3b8de8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804d3b8de8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31070:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804f38b5c8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804f38b5c8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.2/31514:
2 locks held by syz-executor.2/31538:
2 locks held by syz-executor.2/31539:
2 locks held by syz-executor.2/31541:
3 locks held by syz-executor.2/31542:
2 locks held by syz-executor.2/31543:
3 locks held by syz-executor.2/31544:
2 locks held by syz-executor.2/31545:
2 locks held by syz-executor.2/31546:
2 locks held by syz-executor.2/31547:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880520edda8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880520edda8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.2/31548:
2 locks held by syz-executor.2/31549:
2 locks held by syz-executor.2/31550:
2 locks held by syz-executor.2/31551:
2 locks held by syz-executor.2/31552:
2 locks held by syz-executor.2/31553:
2 locks held by syz-executor.2/31554:
2 locks held by syz-executor.2/31555:
2 locks held by syz-executor.2/31556:
2 locks held by syz-executor.2/31557:
4 locks held by syz-executor.2/31564:
2 locks held by syz-executor.2/31566:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880384e2bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880384e2bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.2/31567:
3 locks held by syz-executor.2/31569:
6 locks held by syz-executor.2/31716:
1 lock held by syz-executor.2/32133:
2 locks held by syz-executor.3/32154:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377
#1: ffff88805ba0dda8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
#1: ffff88805ba0dda8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: filename_create+0x256/0x530 fs/namei.c:3765
2 locks held by syz-executor.1/32155:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377
#1: ffff88804cbda1d8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
#1: ffff88804cbda1d8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: filename_create+0x256/0x530 fs/namei.c:3765
2 locks held by syz-executor.5/32156:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377
#1: ffff88804f00b5c8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
#1: ffff88804f00b5c8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: filename_create+0x256/0x530 fs/namei.c:3765
2 locks held by syz-executor.0/32157:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377
#1: ffff88804cbdbfc0 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
#1: ffff88804cbdbfc0 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: filename_create+0x256/0x530 fs/namei.c:3765
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 31544 Comm: syz-executor.2 Not tainted 5.15.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:PagePoisoned include/linux/page-flags.h:218 [inline]
RIP: 0010:TestClearPageLRU include/linux/page-flags.h:351 [inline]
RIP: 0010:isolate_lru_pages+0x632/0x1630 mm/vmscan.c:1960
Code: e6 01 31 ff e8 2f db d0 ff 48 89 d8 48 83 e0 01 0f 85 d3 03 00 00 e8 3d d7 d0 ff 4c 89 e3 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 04 1f 1a 00 4c 8b 2b 48 c7 c7 ff ff ff ff 4c 89
RSP: 0018:ffffc900045dd6c0 EFLAGS: 00000046
RAX: 1ffffd4000160db8 RBX: ffffea0000b06dc0 RCX: ffff88807d719d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900045dd8d0 R08: ffffffff81aee361 R09: fffff94000160dbf
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea0000b06dc0
R13: ffffea0000b06df4 R14: dffffc0000000000 R15: 1ffffd4000160db9
FS: 00007f23fa696700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c65653c680 CR3: 000000004b83f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
shrink_active_list+0x2a8/0x1250 mm/vmscan.c:2299
shrink_list mm/vmscan.c:2437 [inline]
shrink_lruvec+0x1012/0x2b90 mm/vmscan.c:2762
shrink_node_memcgs mm/vmscan.c:2949 [inline]
shrink_node+0x10a7/0x25d0 mm/vmscan.c:3072
shrink_zones mm/vmscan.c:3275 [inline]
do_try_to_free_pages+0x650/0x1670 mm/vmscan.c:3330
try_to_free_mem_cgroup_pages+0x44c/0xa60 mm/vmscan.c:3644
try_charge_memcg+0x4f4/0x1530 mm/memcontrol.c:2651
try_charge mm/memcontrol.c:2776 [inline]
charge_memcg+0x10b/0x340 mm/memcontrol.c:6741
__mem_cgroup_charge+0x23/0x80 mm/memcontrol.c:6777
mem_cgroup_charge include/linux/memcontrol.h:695 [inline]
__add_to_page_cache_locked+0xbdb/0x11a0 mm/filemap.c:892
add_to_page_cache_lru+0x1b3/0x560 mm/filemap.c:984
pagecache_get_page+0xbe0/0x1010 mm/filemap.c:1951
grab_cache_page_write_begin+0x57/0x90 mm/filemap.c:3730
ext4_write_begin+0x2e4/0x15f0 fs/ext4/inode.c:1183
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f23fc166171
Code: c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 <c3> 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f23fc286120 RCX: 00007f23fc166169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f23fc1c1ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fff2f42784f R14: 00007f23fa696300 R15: 0000000000022000
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: d86dfc4d95cd Linux 5.15.106
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14e6621dc80000
kernel config: https://syzkaller.appspot.com/x/.config?x=dca379fe384dda80
dashboard link: https://syzkaller.appspot.com/bug?extid=ace3a2385e145b6600e7
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7ac78299f5d0/disk-d86dfc4d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b63c16a64aad/vmlinux-d86dfc4d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/815813a7f50b/bzImage-d86dfc4d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ace3a2...@syzkaller.appspotmail.com
INFO: task kworker/u4:6:1232 blocked for more than 143 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:6 state:D stack:18912 pid: 1232 ppid: 2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_writepages+0x114f/0x3d10 fs/ext4/inode.c:2810
do_writepages+0x481/0x730 mm/page-writeback.c:2364
__writeback_single_inode+0x15b/0xe30 fs/fs-writeback.c:1622
writeback_sb_inodes+0xbf0/0x1a50 fs/fs-writeback.c:1905
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1976
wb_writeback+0x465/0xc50 fs/fs-writeback.c:2081
wb_check_start_all fs/fs-writeback.c:2203 [inline]
wb_do_writeback fs/fs-writeback.c:2229 [inline]
wb_workfn+0x9f4/0x1130 fs/fs-writeback.c:2263
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2306
process_scheduled_works kernel/workqueue.c:2369 [inline]
worker_thread+0xdcf/0x1280 kernel/workqueue.c:2455
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
INFO: task jbd2/sda1-8:2926 blocked for more than 144 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8 state:D stack:23448 pid: 2926 ppid: 2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
jbd2_journal_commit_transaction+0xd9f/0x6bb0 fs/jbd2/commit.c:496
kjournald2+0x4ae/0x940 fs/jbd2/journal.c:213
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
INFO: task syz-executor.4:3624 blocked for more than 144 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:20920 pid: 3624 ppid: 1 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_dirty_inode+0x8b/0x100 fs/ext4/inode.c:5978
__mark_inode_dirty+0x2fd/0xd60 fs/fs-writeback.c:2439
generic_update_time fs/inode.c:1775 [inline]
inode_update_time fs/inode.c:1788 [inline]
touch_atime+0x3fa/0x680 fs/inode.c:1860
file_accessed include/linux/fs.h:2447 [inline]
iterate_dir+0x48a/0x570 fs/readdir.c:70
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f6b22c0ff77
RSP: 002b:00007ffeb04cf5f8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000055555641d810 RCX: 00007f6b22c0ff77
RDX: 0000000000008000 RSI: 000055555641d840 RDI: 0000000000000003
RBP: 000055555641d840 R08: 0000000000000030 R09: 00007f6b22ce8640
R10: 0000000000000231 R11: 0000000000000293 R12: ffffffffffffffb8
R13: 000055555641d814 R14: 0000000000000016 R15: 00007ffeb04d07f0
</TASK>
INFO: task syz-executor.4:30752 blocked for more than 144 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:20728 pid:30752 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_evict_inode+0x7dd/0x1100 fs/ext4/inode.c:254
evict+0x2a4/0x620 fs/inode.c:587
__dentry_kill+0x436/0x650 fs/dcache.c:582
dentry_kill+0xbb/0x290
dput+0x1f1/0x420 fs/dcache.c:888
__fput+0x5ec/0x890 fs/file_table.c:288
task_work_run+0x129/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0x6a3/0x2480 kernel/exit.c:872
do_group_exit+0x144/0x310 kernel/exit.c:994
get_signal+0xc66/0x14e0 kernel/signal.c:2889
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0af80 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2115d300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31005 blocked for more than 145 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:18968 pid:31005 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_write_begin+0x4b5/0x15f0 fs/ext4/inode.c:1196
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0af80 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2115d300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31009 blocked for more than 145 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:18712 pid:31009 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_write_begin+0x4b5/0x15f0 fs/ext4/inode.c:1196
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0af80 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2115d300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31037 blocked for more than 146 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:19224 pid:31037 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_write_begin+0x4b5/0x15f0 fs/ext4/inode.c:1196
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0af80 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2115d300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31040 blocked for more than 147 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:19256 pid:31040 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_write_begin+0x4b5/0x15f0 fs/ext4/inode.c:1196
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0b050 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2113c300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31041 blocked for more than 148 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:19032 pid:31041 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_write_begin+0x4b5/0x15f0 fs/ext4/inode.c:1196
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0b050 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2113c300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.4:31043 blocked for more than 148 seconds.
Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:18808 pid:31043 ppid: 3624 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
wait_transaction_locked+0x225/0x2c0 fs/jbd2/transaction.c:183
add_transaction_credits+0xfd/0xc00 fs/jbd2/transaction.c:246
start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_dirty_inode+0x8b/0x100 fs/ext4/inode.c:5978
__mark_inode_dirty+0x2fd/0xd60 fs/fs-writeback.c:2439
generic_update_time+0x1cb/0x1e0 fs/inode.c:1775
inode_update_time fs/inode.c:1788 [inline]
file_update_time+0x3eb/0x460 fs/inode.c:1977
ext4_write_checks+0x24a/0x2c0 fs/ext4/file.c:247
ext4_buffered_write_iter+0xc6/0x380 fs/ext4/file.c:264
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f6b22beb171
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f6b22d0b050 RCX: 00007f6b22beb169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f6b22c46ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffeb04d04cf R14: 00007f6b2113c300 R15: 0000000000022000
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c91b920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by kworker/u4:6/1232:
#0: ffff888013db4138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2279
#1: ffffc9000562fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2281
#2: ffff88814b1780e0 (&type->s_umount_key#32){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
#3: ffff88814b17abd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2687
2 locks held by getty/3272:
#0: ffff888023c34098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
2 locks held by syz-executor.2/3620:
2 locks held by syz-executor.4/3624:
#0: ffff88805ba0b5c8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: iterate_dir+0x10a/0x570 fs/readdir.c:55
#1: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2447 [inline]
#1: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: iterate_dir+0x48a/0x570 fs/readdir.c:70
1 lock held by syz-executor.4/30752:
#0: ffff88814b178650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1742 [inline]
#0: ffff88814b178650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1859 [inline]
#0: ffff88814b178650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x375/0x1100 fs/ext4/inode.c:243
2 locks held by syz-executor.4/31005:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804dcb49b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804dcb49b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31009:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804d4a49b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804d4a49b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31037:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff888070c95da8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888070c95da8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31040:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804cbad3b0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804cbad3b0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31041:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804f00a1d8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804f00a1d8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31043:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804f0097e0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804f0097e0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31044:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88805231f198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88805231f198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31045:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88803851bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88803851bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31046:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804dd13fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804dd13fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31047:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804d3bbfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804d3bbfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31048:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804d6c5da8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804d6c5da8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31049:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804d6c3fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804d6c3fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31050:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804f00abd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804f00abd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31051:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880522821d8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880522821d8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31052:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff888052280de8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888052280de8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31053:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880522803f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880522803f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31054:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff888052282bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888052282bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31055:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff888052283fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff888052283fc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31056:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880522817e0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880522817e0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31057:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880378883f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880378883f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31058:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88803788f198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88803788f198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31061:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88803788bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88803788bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31062:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804d3b8de8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804d3b8de8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.4/31070:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88804f38b5c8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88804f38b5c8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.2/31514:
2 locks held by syz-executor.2/31538:
2 locks held by syz-executor.2/31539:
2 locks held by syz-executor.2/31541:
3 locks held by syz-executor.2/31542:
2 locks held by syz-executor.2/31543:
3 locks held by syz-executor.2/31544:
2 locks held by syz-executor.2/31545:
2 locks held by syz-executor.2/31546:
2 locks held by syz-executor.2/31547:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880520edda8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880520edda8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.2/31548:
2 locks held by syz-executor.2/31549:
2 locks held by syz-executor.2/31550:
2 locks held by syz-executor.2/31551:
2 locks held by syz-executor.2/31552:
2 locks held by syz-executor.2/31553:
2 locks held by syz-executor.2/31554:
2 locks held by syz-executor.2/31555:
2 locks held by syz-executor.2/31556:
2 locks held by syz-executor.2/31557:
4 locks held by syz-executor.2/31564:
2 locks held by syz-executor.2/31566:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff8880384e2bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880384e2bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb9/0x380 fs/ext4/file.c:263
2 locks held by syz-executor.2/31567:
3 locks held by syz-executor.2/31569:
6 locks held by syz-executor.2/31716:
1 lock held by syz-executor.2/32133:
2 locks held by syz-executor.3/32154:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377
#1: ffff88805ba0dda8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
#1: ffff88805ba0dda8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: filename_create+0x256/0x530 fs/namei.c:3765
2 locks held by syz-executor.1/32155:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377
#1: ffff88804cbda1d8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
#1: ffff88804cbda1d8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: filename_create+0x256/0x530 fs/namei.c:3765
2 locks held by syz-executor.5/32156:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377
#1: ffff88804f00b5c8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
#1: ffff88804f00b5c8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: filename_create+0x256/0x530 fs/namei.c:3765
2 locks held by syz-executor.0/32157:
#0: ffff88814b178460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377
#1: ffff88804cbdbfc0 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
#1: ffff88804cbdbfc0 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: filename_create+0x256/0x530 fs/namei.c:3765
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 31544 Comm: syz-executor.2 Not tainted 5.15.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:PagePoisoned include/linux/page-flags.h:218 [inline]
RIP: 0010:TestClearPageLRU include/linux/page-flags.h:351 [inline]
RIP: 0010:isolate_lru_pages+0x632/0x1630 mm/vmscan.c:1960
Code: e6 01 31 ff e8 2f db d0 ff 48 89 d8 48 83 e0 01 0f 85 d3 03 00 00 e8 3d d7 d0 ff 4c 89 e3 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 04 1f 1a 00 4c 8b 2b 48 c7 c7 ff ff ff ff 4c 89
RSP: 0018:ffffc900045dd6c0 EFLAGS: 00000046
RAX: 1ffffd4000160db8 RBX: ffffea0000b06dc0 RCX: ffff88807d719d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900045dd8d0 R08: ffffffff81aee361 R09: fffff94000160dbf
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea0000b06dc0
R13: ffffea0000b06df4 R14: dffffc0000000000 R15: 1ffffd4000160db9
FS: 00007f23fa696700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c65653c680 CR3: 000000004b83f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
shrink_active_list+0x2a8/0x1250 mm/vmscan.c:2299
shrink_list mm/vmscan.c:2437 [inline]
shrink_lruvec+0x1012/0x2b90 mm/vmscan.c:2762
shrink_node_memcgs mm/vmscan.c:2949 [inline]
shrink_node+0x10a7/0x25d0 mm/vmscan.c:3072
shrink_zones mm/vmscan.c:3275 [inline]
do_try_to_free_pages+0x650/0x1670 mm/vmscan.c:3330
try_to_free_mem_cgroup_pages+0x44c/0xa60 mm/vmscan.c:3644
try_charge_memcg+0x4f4/0x1530 mm/memcontrol.c:2651
try_charge mm/memcontrol.c:2776 [inline]
charge_memcg+0x10b/0x340 mm/memcontrol.c:6741
__mem_cgroup_charge+0x23/0x80 mm/memcontrol.c:6777
mem_cgroup_charge include/linux/memcontrol.h:695 [inline]
__add_to_page_cache_locked+0xbdb/0x11a0 mm/filemap.c:892
add_to_page_cache_lru+0x1b3/0x560 mm/filemap.c:984
pagecache_get_page+0xbe0/0x1010 mm/filemap.c:1951
grab_cache_page_write_begin+0x57/0x90 mm/filemap.c:3730
ext4_write_begin+0x2e4/0x15f0 fs/ext4/inode.c:1183
ext4_da_write_begin+0x342/0xb60 fs/ext4/inode.c:2973
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f23fc166171
Code: c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 <c3> 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:0000000020000050 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f23fc286120 RCX: 00007f23fc166169
RDX: 0000000000000000 RSI: 0000000020000050 RDI: 0000000000000400
RBP: 00007f23fc1c1ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fff2f42784f R14: 00007f23fa696300 R15: 0000000000022000
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot
Aug 4, 2023, 10:01:43 AM8/4/23
to syzkaller...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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