INFO: task hung in copy_process (2)
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syzbot
Nov 30, 2021, 4:31:31 PM11/30/21
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=160ddbeeb00000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=8886b7165eb92f009fdf
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8886b7...@syzkaller.appspotmail.com
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
INFO: task syz-executor.2:8125 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D24368 8125 8124 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
dup_mmap kernel/fork.c:516 [inline]
dup_mm kernel/fork.c:1285 [inline]
copy_mm kernel/fork.c:1341 [inline]
copy_process.part.0+0x30c4/0x8260 kernel/fork.c:1913
copy_process kernel/fork.c:1710 [inline]
_do_fork+0x22f/0xf30 kernel/fork.c:2219
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f26794470db
Code: Bad RIP value.
RSP: 002b:00007fff5f171520 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f26794470db
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000555556e1a400
R10: 0000555556e1a6d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff5f171600
INFO: task syz-executor.1:10603 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D27648 10603 8123 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
unlink_file_vma+0x71/0xb0 mm/mmap.c:161
free_pgtables+0x1b3/0x2f0 mm/memory.c:653
exit_mmap+0x2c8/0x530 mm/mmap.c:3094
__mmput kernel/fork.c:1016 [inline]
mmput+0x14e/0x4a0 kernel/fork.c:1037
exit_mm kernel/exit.c:549 [inline]
do_exit+0xaec/0x2be0 kernel/exit.c:857
do_group_exit+0x125/0x310 kernel/exit.c:967
__do_sys_exit_group kernel/exit.c:978 [inline]
__se_sys_exit_group kernel/exit.c:976 [inline]
__x64_sys_exit_group+0x3a/0x50 kernel/exit.c:976
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7ff7f397dae9
Code: Bad RIP value.
RSP: 002b:00007ff7f0ef2bc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007ff7f3a90f60 RCX: 00007ff7f397dae9
RDX: ffffffffffffffbc RSI: 0000000000000000 RDI: 000000000000000b
RBP: 000000000000000b R08: 0000000000000000 R09: 00007ff7f3a90f60
R10: 0000000000001000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff52e5900f R14: 00007ff7f0ef3300 R15: 0000000000022000
INFO: task syz-executor.1:11751 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D28624 11751 8123 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
unlink_file_vma+0x71/0xb0 mm/mmap.c:161
free_pgtables+0x1b3/0x2f0 mm/memory.c:653
exit_mmap+0x2c8/0x530 mm/mmap.c:3094
__mmput kernel/fork.c:1016 [inline]
mmput+0x14e/0x4a0 kernel/fork.c:1037
exit_mm kernel/exit.c:549 [inline]
do_exit+0xaec/0x2be0 kernel/exit.c:857
do_group_exit+0x125/0x310 kernel/exit.c:967
get_signal+0x3f2/0x1f70 kernel/signal.c:2589
do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7ff7f397dae9
Code: Bad RIP value.
RSP: 002b:00007ff7f0ed2218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007ff7f3a91028 RCX: 00007ff7f397dae9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff7f3a9102c
RBP: 00007ff7f3a91020 R08: 000000000000000e R09: 0000000000000000
R10: 00000000049e5b0b R11: 0000000000000246 R12: 00007ff7f3a9102c
R13: 00007fff52e5900f R14: 00007ff7f0ed2300 R15: 0000000000022000
INFO: task syz-executor.0:11752 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D23760 11752 8121 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
unlink_file_vma+0x71/0xb0 mm/mmap.c:161
free_pgtables+0x1b3/0x2f0 mm/memory.c:653
exit_mmap+0x2c8/0x530 mm/mmap.c:3094
__mmput kernel/fork.c:1016 [inline]
mmput+0x14e/0x4a0 kernel/fork.c:1037
exit_mm kernel/exit.c:549 [inline]
do_exit+0xaec/0x2be0 kernel/exit.c:857
do_group_exit+0x125/0x310 kernel/exit.c:967
get_signal+0x3f2/0x1f70 kernel/signal.c:2589
do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fae2d997ae9
Code: Bad RIP value.
RSP: 002b:00007fae2af0d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fae2daaaf68 RCX: 00007fae2d997ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fae2daaaf68
RBP: 00007fae2daaaf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fae2daaaf6c
R13: 00007ffe15ee888f R14: 00007fae2af0d300 R15: 0000000000022000
INFO: task syz-executor.3:11754 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D28496 11754 11901 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
unlink_file_vma+0x71/0xb0 mm/mmap.c:161
free_pgtables+0x1b3/0x2f0 mm/memory.c:653
exit_mmap+0x2c8/0x530 mm/mmap.c:3094
__mmput kernel/fork.c:1016 [inline]
mmput+0x14e/0x4a0 kernel/fork.c:1037
exit_mm kernel/exit.c:549 [inline]
do_exit+0xaec/0x2be0 kernel/exit.c:857
do_group_exit+0x125/0x310 kernel/exit.c:967
get_signal+0x3f2/0x1f70 kernel/signal.c:2589
do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f0515408ae9
Code: Bad RIP value.
RSP: 002b:00007f051295d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f051551c028 RCX: 00007f0515408ae9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f051551c02c
RBP: 00007f051551c020 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f051551c02c
R13: 00007ffce4cc030f R14: 00007f051295d300 R15: 0000000000022000
INFO: task syz-executor.5:11753 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D28752 11753 8131 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
unlink_file_vma+0x71/0xb0 mm/mmap.c:161
free_pgtables+0x1b3/0x2f0 mm/memory.c:653
exit_mmap+0x2c8/0x530 mm/mmap.c:3094
__mmput kernel/fork.c:1016 [inline]
mmput+0x14e/0x4a0 kernel/fork.c:1037
exit_mm kernel/exit.c:549 [inline]
do_exit+0xaec/0x2be0 kernel/exit.c:857
do_group_exit+0x125/0x310 kernel/exit.c:967
get_signal+0x3f2/0x1f70 kernel/signal.c:2589
do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f6e1389aae9
Code: Bad RIP value.
RSP: 002b:00007f6e10dce218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f6e139ae0e8 RCX: 00007f6e1389aae9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f6e139ae0ec
RBP: 00007f6e139ae0e0 R08: 000000000000007e R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f6e139ae0ec
R13: 00007fffb7f64e6f R14: 00007f6e10dce300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/1570:
#0: 00000000a1a86b2c (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7773:
#0: 0000000052a6e7f4 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
1 lock held by syz-executor.0/8120:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.1/8122:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.2/8124:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
4 locks held by syz-executor.2/8125:
#0: 00000000ba7bed9a (&dup_mmap_sem){.+.+}, at: dup_mmap kernel/fork.c:435 [inline]
#0: 00000000ba7bed9a (&dup_mmap_sem){.+.+}, at: dup_mm kernel/fork.c:1285 [inline]
#0: 00000000ba7bed9a (&dup_mmap_sem){.+.+}, at: copy_mm kernel/fork.c:1341 [inline]
#0: 00000000ba7bed9a (&dup_mmap_sem){.+.+}, at: copy_process.part.0+0x2bb3/0x8260 kernel/fork.c:1913
#1: 00000000ff71f946 (&mm->mmap_sem){++++}, at: dup_mmap kernel/fork.c:436 [inline]
#1: 00000000ff71f946 (&mm->mmap_sem){++++}, at: dup_mm kernel/fork.c:1285 [inline]
#1: 00000000ff71f946 (&mm->mmap_sem){++++}, at: copy_mm kernel/fork.c:1341 [inline]
#1: 00000000ff71f946 (&mm->mmap_sem){++++}, at: copy_process.part.0+0x2bcf/0x8260 kernel/fork.c:1913
#2: 0000000018b1a735 (&mm->mmap_sem/1){+.+.}, at: dup_mmap kernel/fork.c:445 [inline]
#2: 0000000018b1a735 (&mm->mmap_sem/1){+.+.}, at: dup_mm kernel/fork.c:1285 [inline]
#2: 0000000018b1a735 (&mm->mmap_sem/1){+.+.}, at: copy_mm kernel/fork.c:1341 [inline]
#2: 0000000018b1a735 (&mm->mmap_sem/1){+.+.}, at: copy_process.part.0+0x2c1c/0x8260 kernel/fork.c:1913
#3: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#3: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: dup_mmap kernel/fork.c:516 [inline]
#3: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: dup_mm kernel/fork.c:1285 [inline]
#3: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: copy_mm kernel/fork.c:1341 [inline]
#3: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: copy_process.part.0+0x30c4/0x8260 kernel/fork.c:1913
1 lock held by syz-executor.5/8130:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.3/11900:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.4/15967:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.1/10603:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.1/11751:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.0/11752:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.3/11754:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
3 locks held by syz-executor.4/11745:
1 lock held by syz-executor.5/11753:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x991/0xe60 kernel/hung_task.c:287
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11745 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:strlen+0x4d/0x90 lib/string.c:539
Code: 07 38 d0 7f 04 84 c0 75 48 80 7d 00 00 74 39 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 01 48 89 c2 48 89 c1 48 c1 ea 03 <83> e1 07 0f b6 14 1a 38 ca 7f 04 84 d2 75 1f 80 38 00 75 de 48 83
RSP: 0018:ffff8880ba107c30 EFLAGS: 00000803
RAX: ffffffff886bdc64 RBX: dffffc0000000000 RCX: ffffffff886bdc64
RDX: 1ffffffff10d7b8c RSI: ffff8880ba124cd8 RDI: ffffffff886bdc60
RBP: ffffffff886bdc60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8c66505b R12: ffffffff89f6d360
R13: ffff8880ba124cd8 R14: ffffffff814a7850 R15: ffff8880ba107d00
FS: 00007fc3eb955700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f96fc7f6000 CR3: 00000002258e8000 CR4: 00000000003426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
strlen include/linux/string.h:299 [inline]
trace_event_get_offsets_lock include/trace/events/lock.h:39 [inline]
perf_trace_lock+0xb1/0x4b0 include/trace/events/lock.h:39
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x4e8/0x8b0 kernel/locking/lockdep.c:3926
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline]
_raw_spin_unlock_irqrestore+0x1b/0xe0 kernel/locking/spinlock.c:184
__run_hrtimer kernel/time/hrtimer.c:1463 [inline]
__hrtimer_run_queues+0x397/0xe60 kernel/time/hrtimer.c:1527
hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline]
smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
</IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x50 kernel/kcov.c:107
Code: 59 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48 83 c2 01 <48> 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 49
RSP: 0018:ffff88821a0ef948 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90012d78000
RDX: 0000000000040000 RSI: ffffffff818ba5f4 RDI: 0000000000000005
RBP: ffffea0002a7d408 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000100
R13: ffffea0002a7d400 R14: dffffc0000000000 R15: 00007f0514ef8000
page_mapcount include/linux/mm.h:642 [inline]
zap_pte_range mm/memory.c:1351 [inline]
zap_pmd_range mm/memory.c:1463 [inline]
zap_pud_range mm/memory.c:1492 [inline]
zap_p4d_range mm/memory.c:1513 [inline]
unmap_page_range+0x19f4/0x2c50 mm/memory.c:1534
unmap_single_vma+0x198/0x300 mm/memory.c:1579
zap_page_range_single+0x247/0x380 mm/memory.c:1658
unmap_mapping_range_vma mm/memory.c:2910 [inline]
unmap_mapping_range_tree mm/memory.c:2931 [inline]
unmap_mapping_pages+0x22c/0x2b0 mm/memory.c:2993
truncate_pagecache+0x51/0x90 mm/truncate.c:799
simple_setattr+0xdf/0x100 fs/libfs.c:413
notify_change+0xd93/0xfc0 fs/attr.c:336
do_truncate+0x134/0x1f0 fs/open.c:63
do_sys_ftruncate+0x492/0x560 fs/open.c:194
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fc3ee3dfae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc3eb955188 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007fc3ee4f2f60 RCX: 00007fc3ee3dfae9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000000
RBP: 00007fc3ee439f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd4c48e7df R14: 00007fc3eb955300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 38 d0 cmp %dl,%al
2: 7f 04 jg 0x8
4: 84 c0 test %al,%al
6: 75 48 jne 0x50
8: 80 7d 00 00 cmpb $0x0,0x0(%rbp)
c: 74 39 je 0x47
e: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx
15: fc ff df
18: 48 89 e8 mov %rbp,%rax
1b: 48 83 c0 01 add $0x1,%rax
1f: 48 89 c2 mov %rax,%rdx
22: 48 89 c1 mov %rax,%rcx
25: 48 c1 ea 03 shr $0x3,%rdx
* 29: 83 e1 07 and $0x7,%ecx <-- trapping instruction
2c: 0f b6 14 1a movzbl (%rdx,%rbx,1),%edx
30: 38 ca cmp %cl,%dl
32: 7f 04 jg 0x38
34: 84 d2 test %dl,%dl
36: 75 1f jne 0x57
38: 80 38 00 cmpb $0x0,(%rax)
3b: 75 de jne 0x1b
3d: 48 rex.W
3e: 83 .byte 0x83
---
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: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=160ddbeeb00000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=8886b7165eb92f009fdf
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8886b7...@syzkaller.appspotmail.com
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
INFO: task syz-executor.2:8125 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D24368 8125 8124 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
dup_mmap kernel/fork.c:516 [inline]
dup_mm kernel/fork.c:1285 [inline]
copy_mm kernel/fork.c:1341 [inline]
copy_process.part.0+0x30c4/0x8260 kernel/fork.c:1913
copy_process kernel/fork.c:1710 [inline]
_do_fork+0x22f/0xf30 kernel/fork.c:2219
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f26794470db
Code: Bad RIP value.
RSP: 002b:00007fff5f171520 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f26794470db
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000555556e1a400
R10: 0000555556e1a6d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff5f171600
INFO: task syz-executor.1:10603 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D27648 10603 8123 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
unlink_file_vma+0x71/0xb0 mm/mmap.c:161
free_pgtables+0x1b3/0x2f0 mm/memory.c:653
exit_mmap+0x2c8/0x530 mm/mmap.c:3094
__mmput kernel/fork.c:1016 [inline]
mmput+0x14e/0x4a0 kernel/fork.c:1037
exit_mm kernel/exit.c:549 [inline]
do_exit+0xaec/0x2be0 kernel/exit.c:857
do_group_exit+0x125/0x310 kernel/exit.c:967
__do_sys_exit_group kernel/exit.c:978 [inline]
__se_sys_exit_group kernel/exit.c:976 [inline]
__x64_sys_exit_group+0x3a/0x50 kernel/exit.c:976
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7ff7f397dae9
Code: Bad RIP value.
RSP: 002b:00007ff7f0ef2bc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007ff7f3a90f60 RCX: 00007ff7f397dae9
RDX: ffffffffffffffbc RSI: 0000000000000000 RDI: 000000000000000b
RBP: 000000000000000b R08: 0000000000000000 R09: 00007ff7f3a90f60
R10: 0000000000001000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff52e5900f R14: 00007ff7f0ef3300 R15: 0000000000022000
INFO: task syz-executor.1:11751 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D28624 11751 8123 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
unlink_file_vma+0x71/0xb0 mm/mmap.c:161
free_pgtables+0x1b3/0x2f0 mm/memory.c:653
exit_mmap+0x2c8/0x530 mm/mmap.c:3094
__mmput kernel/fork.c:1016 [inline]
mmput+0x14e/0x4a0 kernel/fork.c:1037
exit_mm kernel/exit.c:549 [inline]
do_exit+0xaec/0x2be0 kernel/exit.c:857
do_group_exit+0x125/0x310 kernel/exit.c:967
get_signal+0x3f2/0x1f70 kernel/signal.c:2589
do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7ff7f397dae9
Code: Bad RIP value.
RSP: 002b:00007ff7f0ed2218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007ff7f3a91028 RCX: 00007ff7f397dae9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff7f3a9102c
RBP: 00007ff7f3a91020 R08: 000000000000000e R09: 0000000000000000
R10: 00000000049e5b0b R11: 0000000000000246 R12: 00007ff7f3a9102c
R13: 00007fff52e5900f R14: 00007ff7f0ed2300 R15: 0000000000022000
INFO: task syz-executor.0:11752 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D23760 11752 8121 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
unlink_file_vma+0x71/0xb0 mm/mmap.c:161
free_pgtables+0x1b3/0x2f0 mm/memory.c:653
exit_mmap+0x2c8/0x530 mm/mmap.c:3094
__mmput kernel/fork.c:1016 [inline]
mmput+0x14e/0x4a0 kernel/fork.c:1037
exit_mm kernel/exit.c:549 [inline]
do_exit+0xaec/0x2be0 kernel/exit.c:857
do_group_exit+0x125/0x310 kernel/exit.c:967
get_signal+0x3f2/0x1f70 kernel/signal.c:2589
do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fae2d997ae9
Code: Bad RIP value.
RSP: 002b:00007fae2af0d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fae2daaaf68 RCX: 00007fae2d997ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fae2daaaf68
RBP: 00007fae2daaaf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fae2daaaf6c
R13: 00007ffe15ee888f R14: 00007fae2af0d300 R15: 0000000000022000
INFO: task syz-executor.3:11754 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D28496 11754 11901 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
unlink_file_vma+0x71/0xb0 mm/mmap.c:161
free_pgtables+0x1b3/0x2f0 mm/memory.c:653
exit_mmap+0x2c8/0x530 mm/mmap.c:3094
__mmput kernel/fork.c:1016 [inline]
mmput+0x14e/0x4a0 kernel/fork.c:1037
exit_mm kernel/exit.c:549 [inline]
do_exit+0xaec/0x2be0 kernel/exit.c:857
do_group_exit+0x125/0x310 kernel/exit.c:967
get_signal+0x3f2/0x1f70 kernel/signal.c:2589
do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f0515408ae9
Code: Bad RIP value.
RSP: 002b:00007f051295d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f051551c028 RCX: 00007f0515408ae9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f051551c02c
RBP: 00007f051551c020 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f051551c02c
R13: 00007ffce4cc030f R14: 00007f051295d300 R15: 0000000000022000
INFO: task syz-executor.5:11753 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D28752 11753 8131 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0x4f/0x90 kernel/locking/rwsem.c:72
i_mmap_lock_write include/linux/fs.h:491 [inline]
unlink_file_vma+0x71/0xb0 mm/mmap.c:161
free_pgtables+0x1b3/0x2f0 mm/memory.c:653
exit_mmap+0x2c8/0x530 mm/mmap.c:3094
__mmput kernel/fork.c:1016 [inline]
mmput+0x14e/0x4a0 kernel/fork.c:1037
exit_mm kernel/exit.c:549 [inline]
do_exit+0xaec/0x2be0 kernel/exit.c:857
do_group_exit+0x125/0x310 kernel/exit.c:967
get_signal+0x3f2/0x1f70 kernel/signal.c:2589
do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f6e1389aae9
Code: Bad RIP value.
RSP: 002b:00007f6e10dce218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f6e139ae0e8 RCX: 00007f6e1389aae9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f6e139ae0ec
RBP: 00007f6e139ae0e0 R08: 000000000000007e R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f6e139ae0ec
R13: 00007fffb7f64e6f R14: 00007f6e10dce300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/1570:
#0: 00000000a1a86b2c (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7773:
#0: 0000000052a6e7f4 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
1 lock held by syz-executor.0/8120:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.1/8122:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.2/8124:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
4 locks held by syz-executor.2/8125:
#0: 00000000ba7bed9a (&dup_mmap_sem){.+.+}, at: dup_mmap kernel/fork.c:435 [inline]
#0: 00000000ba7bed9a (&dup_mmap_sem){.+.+}, at: dup_mm kernel/fork.c:1285 [inline]
#0: 00000000ba7bed9a (&dup_mmap_sem){.+.+}, at: copy_mm kernel/fork.c:1341 [inline]
#0: 00000000ba7bed9a (&dup_mmap_sem){.+.+}, at: copy_process.part.0+0x2bb3/0x8260 kernel/fork.c:1913
#1: 00000000ff71f946 (&mm->mmap_sem){++++}, at: dup_mmap kernel/fork.c:436 [inline]
#1: 00000000ff71f946 (&mm->mmap_sem){++++}, at: dup_mm kernel/fork.c:1285 [inline]
#1: 00000000ff71f946 (&mm->mmap_sem){++++}, at: copy_mm kernel/fork.c:1341 [inline]
#1: 00000000ff71f946 (&mm->mmap_sem){++++}, at: copy_process.part.0+0x2bcf/0x8260 kernel/fork.c:1913
#2: 0000000018b1a735 (&mm->mmap_sem/1){+.+.}, at: dup_mmap kernel/fork.c:445 [inline]
#2: 0000000018b1a735 (&mm->mmap_sem/1){+.+.}, at: dup_mm kernel/fork.c:1285 [inline]
#2: 0000000018b1a735 (&mm->mmap_sem/1){+.+.}, at: copy_mm kernel/fork.c:1341 [inline]
#2: 0000000018b1a735 (&mm->mmap_sem/1){+.+.}, at: copy_process.part.0+0x2c1c/0x8260 kernel/fork.c:1913
#3: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#3: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: dup_mmap kernel/fork.c:516 [inline]
#3: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: dup_mm kernel/fork.c:1285 [inline]
#3: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: copy_mm kernel/fork.c:1341 [inline]
#3: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: copy_process.part.0+0x30c4/0x8260 kernel/fork.c:1913
1 lock held by syz-executor.5/8130:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.3/11900:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.4/15967:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.1/10603:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.1/11751:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.0/11752:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
1 lock held by syz-executor.3/11754:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
3 locks held by syz-executor.4/11745:
1 lock held by syz-executor.5/11753:
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:491 [inline]
#0: 000000008e069904 (&mapping->i_mmap_rwsem){++++}, at: unlink_file_vma+0x71/0xb0 mm/mmap.c:161
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x991/0xe60 kernel/hung_task.c:287
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11745 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:strlen+0x4d/0x90 lib/string.c:539
Code: 07 38 d0 7f 04 84 c0 75 48 80 7d 00 00 74 39 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 01 48 89 c2 48 89 c1 48 c1 ea 03 <83> e1 07 0f b6 14 1a 38 ca 7f 04 84 d2 75 1f 80 38 00 75 de 48 83
RSP: 0018:ffff8880ba107c30 EFLAGS: 00000803
RAX: ffffffff886bdc64 RBX: dffffc0000000000 RCX: ffffffff886bdc64
RDX: 1ffffffff10d7b8c RSI: ffff8880ba124cd8 RDI: ffffffff886bdc60
RBP: ffffffff886bdc60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8c66505b R12: ffffffff89f6d360
R13: ffff8880ba124cd8 R14: ffffffff814a7850 R15: ffff8880ba107d00
FS: 00007fc3eb955700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f96fc7f6000 CR3: 00000002258e8000 CR4: 00000000003426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
strlen include/linux/string.h:299 [inline]
trace_event_get_offsets_lock include/trace/events/lock.h:39 [inline]
perf_trace_lock+0xb1/0x4b0 include/trace/events/lock.h:39
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x4e8/0x8b0 kernel/locking/lockdep.c:3926
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline]
_raw_spin_unlock_irqrestore+0x1b/0xe0 kernel/locking/spinlock.c:184
__run_hrtimer kernel/time/hrtimer.c:1463 [inline]
__hrtimer_run_queues+0x397/0xe60 kernel/time/hrtimer.c:1527
hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline]
smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
</IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x50 kernel/kcov.c:107
Code: 59 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48 83 c2 01 <48> 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 49
RSP: 0018:ffff88821a0ef948 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90012d78000
RDX: 0000000000040000 RSI: ffffffff818ba5f4 RDI: 0000000000000005
RBP: ffffea0002a7d408 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000100
R13: ffffea0002a7d400 R14: dffffc0000000000 R15: 00007f0514ef8000
page_mapcount include/linux/mm.h:642 [inline]
zap_pte_range mm/memory.c:1351 [inline]
zap_pmd_range mm/memory.c:1463 [inline]
zap_pud_range mm/memory.c:1492 [inline]
zap_p4d_range mm/memory.c:1513 [inline]
unmap_page_range+0x19f4/0x2c50 mm/memory.c:1534
unmap_single_vma+0x198/0x300 mm/memory.c:1579
zap_page_range_single+0x247/0x380 mm/memory.c:1658
unmap_mapping_range_vma mm/memory.c:2910 [inline]
unmap_mapping_range_tree mm/memory.c:2931 [inline]
unmap_mapping_pages+0x22c/0x2b0 mm/memory.c:2993
truncate_pagecache+0x51/0x90 mm/truncate.c:799
simple_setattr+0xdf/0x100 fs/libfs.c:413
notify_change+0xd93/0xfc0 fs/attr.c:336
do_truncate+0x134/0x1f0 fs/open.c:63
do_sys_ftruncate+0x492/0x560 fs/open.c:194
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fc3ee3dfae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc3eb955188 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007fc3ee4f2f60 RCX: 00007fc3ee3dfae9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000000
RBP: 00007fc3ee439f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd4c48e7df R14: 00007fc3eb955300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 38 d0 cmp %dl,%al
2: 7f 04 jg 0x8
4: 84 c0 test %al,%al
6: 75 48 jne 0x50
8: 80 7d 00 00 cmpb $0x0,0x0(%rbp)
c: 74 39 je 0x47
e: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx
15: fc ff df
18: 48 89 e8 mov %rbp,%rax
1b: 48 83 c0 01 add $0x1,%rax
1f: 48 89 c2 mov %rax,%rdx
22: 48 89 c1 mov %rax,%rcx
25: 48 c1 ea 03 shr $0x3,%rdx
* 29: 83 e1 07 and $0x7,%ecx <-- trapping instruction
2c: 0f b6 14 1a movzbl (%rdx,%rbx,1),%edx
30: 38 ca cmp %cl,%dl
32: 7f 04 jg 0x38
34: 84 d2 test %dl,%dl
36: 75 1f jne 0x57
38: 80 38 00 cmpb $0x0,(%rax)
3b: 75 de jne 0x1b
3d: 48 rex.W
3e: 83 .byte 0x83
---
This report is generated by a bot. It may contain errors.
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syzbot
Mar 30, 2022, 5:31:13 PM3/30/22
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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