[v6.1] INFO: task hung in find_inode_fast (2)
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syzbot
Apr 17, 2025, 9:02:32 AM4/17/25
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 420102835862 Linux 6.1.134
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1647efe4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=5b8d7e66d7963efe
dashboard link: https://syzkaller.appspot.com/bug?extid=86129b61506f3a4600ee
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/91a5e36a108f/disk-42010283.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ec90f2faa77e/vmlinux-42010283.xz
kernel image: https://storage.googleapis.com/syzbot-assets/dce3af94d7be/bzImage-42010283.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+86129b...@syzkaller.appspotmail.com
INFO: task syz.1.580:6743 blocked for more than 143 seconds.
Not tainted 6.1.134-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.580 state:D stack:26192 pid:6743 ppid:4250 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
__wait_on_freeing_inode fs/inode.c:2286 [inline]
find_inode_fast+0x315/0x450 fs/inode.c:995
iget_locked+0xc7/0x830 fs/inode.c:1360
__ext4_iget+0x25d/0x3ee0 fs/ext4/inode.c:4831
ext4_xattr_inode_cache_find fs/ext4/xattr.c:1499 [inline]
ext4_xattr_inode_lookup_create+0x510/0x1ff0 fs/ext4/xattr.c:1538
ext4_xattr_ibody_set+0x210/0x720 fs/ext4/xattr.c:2215
ext4_xattr_set_handle+0xc72/0x1560 fs/ext4/xattr.c:2392
ext4_xattr_set+0x26e/0x3d0 fs/ext4/xattr.c:2506
__vfs_setxattr+0x3e7/0x420 fs/xattr.c:182
__vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216
vfs_setxattr+0x21d/0x420 fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x250/0x2b0 fs/xattr.c:617
path_setxattr+0x1bc/0x2a0 fs/xattr.c:636
__do_sys_setxattr fs/xattr.c:652 [inline]
__se_sys_setxattr fs/xattr.c:648 [inline]
__x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7e7018e169
RSP: 002b:00007f7e70f17038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f7e703b6080 RCX: 00007f7e7018e169
RDX: 0000200000001400 RSI: 00002000000001c0 RDI: 0000200000000200
RBP: 00007f7e70210a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000835 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f7e703b6080 R15: 00007ffd9e1c77b8
</TASK>
INFO: task syz.1.580:6745 blocked for more than 143 seconds.
Not tainted 6.1.134-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.580 state:D stack:25808 pid:6745 ppid:4250 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
mb_cache_entry_wait_unused+0x162/0x240 fs/mbcache.c:148
ext4_evict_ea_inode+0x146/0x2e0 fs/ext4/xattr.c:444
ext4_evict_inode+0x19d/0x1150 fs/ext4/inode.c:181
evict+0x529/0x930 fs/inode.c:705
ext4_xattr_set_entry+0x183a/0x1fa0 fs/ext4/xattr.c:1798
ext4_xattr_block_set+0x1a92/0x3820 fs/ext4/xattr.c:1910
ext4_xattr_set_handle+0x1043/0x1560 fs/ext4/xattr.c:2395
ext4_xattr_set+0x26e/0x3d0 fs/ext4/xattr.c:2506
__vfs_setxattr+0x3e7/0x420 fs/xattr.c:182
__vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216
vfs_setxattr+0x21d/0x420 fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x250/0x2b0 fs/xattr.c:617
path_setxattr+0x1bc/0x2a0 fs/xattr.c:636
__do_sys_setxattr fs/xattr.c:652 [inline]
__se_sys_setxattr fs/xattr.c:648 [inline]
__x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7e7018e169
RSP: 002b:00007f7e6ffff038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f7e703b6160 RCX: 00007f7e7018e169
RDX: 0000200000000080 RSI: 0000200000000180 RDI: 00002000000000c0
RBP: 00007f7e70210a68 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000032 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f7e703b6160 R15: 00007ffd9e1c77b8
</TASK>
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d32e910 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d32f110 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6510
2 locks held by getty/4011:
#0: ffff88807e388098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000325e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x54a/0x1620 drivers/tty/n_tty.c:2198
1 lock held by syz-executor/4249:
2 locks held by syz-executor/4262:
#0: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#0: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f0/0x930 kernel/rcu/tree_exp.h:962
#1: ffff8880b8e3a998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
2 locks held by syz-executor/4376:
1 lock held by syz-executor/4399:
#0: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#0: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x360/0x930 kernel/rcu/tree_exp.h:962
5 locks held by kworker/u4:8/5422:
#0: ffff888017e16938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc900034e7d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#2: ffffffff8e544210 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x166/0xd20 net/core/net_namespace.c:594
#3: ffff88801f3472f8 (&devlink->lock_key#10){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x132/0x2f0 net/devlink/leftover.c:12500
#4: ffffffff8d333c40 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x5f0 kernel/rcu/tree.c:4019
3 locks held by syz.1.580/6743:
#0: ffff8880207d6460 (sb_writers#4){++++}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1: ffff888070be8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888070be8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x1dd/0x420 fs/xattr.c:308
#2: ffff888070be80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff888070be80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x270/0x1560 fs/ext4/xattr.c:2319
3 locks held by syz.1.580/6745:
#0: ffff8880207d6460 (sb_writers#4){++++}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1: ffff888070bec030 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888070bec030 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x1dd/0x420 fs/xattr.c:308
#2: ffff888070bebcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff888070bebcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x270/0x1560 fs/ext4/xattr.c:2319
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ca/0x430 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3612 Comm: klogd Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0x7c/0xe0 kernel/kcov.c:349
Code: c2 49 39 d2 74 71 4c 8b 74 d6 10 65 8b 05 e4 1d 78 7e 25 00 01 ff 00 74 11 3d 00 01 00 00 75 de 41 83 bb 1c 16 00 00 00 74 d4 <41> 8b 83 f8 15 00 00 83 f8 03 75 c8 49 8b 8b 00 16 00 00 45 8b bb
RSP: 0018:ffffc90003247658 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000075 RCX: 000000000000008b
RDX: 0000000000000002 RSI: ffffffff8e89e400 RDI: 0000000000000075
RBP: ffffc90003247770 R08: 0000000000000005 R09: ffffffff8aab2b35
R10: 000000000000000a R11: ffff88807c4f1dc0 R12: ffff0a1000000600
R13: ffff001000000600 R14: 0000000000000063 R15: 1ffffffff1619a59
FS: 00007f48d767b380(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa2435b6ca0 CR3: 000000007e5ff000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
format_decode+0xab5/0x1f10 lib/vsprintf.c:2615
vsnprintf+0x14d/0x1c70 lib/vsprintf.c:2757
sprintf+0xd6/0x120 lib/vsprintf.c:3009
print_time kernel/printk/printk.c:1274 [inline]
info_print_prefix+0x167/0x300 kernel/printk/printk.c:1300
record_print_text+0x142/0x430 kernel/printk/printk.c:1349
syslog_print+0x3d8/0x620 kernel/printk/printk.c:1560
do_syslog+0x819/0x910 kernel/printk/printk.c:1679
__do_sys_syslog kernel/printk/printk.c:1771 [inline]
__se_sys_syslog kernel/printk/printk.c:1769 [inline]
__x64_sys_syslog+0x78/0x90 kernel/printk/printk.c:1769
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f48d77dcfa7
Code: 73 01 c3 48 8b 0d 81 ce 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 ce 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007fffa19a7d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 00007f48d797b4a0 RCX: 00007f48d77dcfa7
RDX: 00000000000003ff RSI: 00007f48d797b4a0 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000005 R09: 30c3065a11fc9209
R10: 0000000000004000 R11: 0000000000000206 R12: 00007f48d797b4a0
R13: 00007f48d796b212 R14: 00007f48d797b51e R15: 00007f48d797b51e
</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.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 420102835862 Linux 6.1.134
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1647efe4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=5b8d7e66d7963efe
dashboard link: https://syzkaller.appspot.com/bug?extid=86129b61506f3a4600ee
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/91a5e36a108f/disk-42010283.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ec90f2faa77e/vmlinux-42010283.xz
kernel image: https://storage.googleapis.com/syzbot-assets/dce3af94d7be/bzImage-42010283.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+86129b...@syzkaller.appspotmail.com
INFO: task syz.1.580:6743 blocked for more than 143 seconds.
Not tainted 6.1.134-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.580 state:D stack:26192 pid:6743 ppid:4250 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
__wait_on_freeing_inode fs/inode.c:2286 [inline]
find_inode_fast+0x315/0x450 fs/inode.c:995
iget_locked+0xc7/0x830 fs/inode.c:1360
__ext4_iget+0x25d/0x3ee0 fs/ext4/inode.c:4831
ext4_xattr_inode_cache_find fs/ext4/xattr.c:1499 [inline]
ext4_xattr_inode_lookup_create+0x510/0x1ff0 fs/ext4/xattr.c:1538
ext4_xattr_ibody_set+0x210/0x720 fs/ext4/xattr.c:2215
ext4_xattr_set_handle+0xc72/0x1560 fs/ext4/xattr.c:2392
ext4_xattr_set+0x26e/0x3d0 fs/ext4/xattr.c:2506
__vfs_setxattr+0x3e7/0x420 fs/xattr.c:182
__vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216
vfs_setxattr+0x21d/0x420 fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x250/0x2b0 fs/xattr.c:617
path_setxattr+0x1bc/0x2a0 fs/xattr.c:636
__do_sys_setxattr fs/xattr.c:652 [inline]
__se_sys_setxattr fs/xattr.c:648 [inline]
__x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7e7018e169
RSP: 002b:00007f7e70f17038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f7e703b6080 RCX: 00007f7e7018e169
RDX: 0000200000001400 RSI: 00002000000001c0 RDI: 0000200000000200
RBP: 00007f7e70210a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000835 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f7e703b6080 R15: 00007ffd9e1c77b8
</TASK>
INFO: task syz.1.580:6745 blocked for more than 143 seconds.
Not tainted 6.1.134-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.580 state:D stack:25808 pid:6745 ppid:4250 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
mb_cache_entry_wait_unused+0x162/0x240 fs/mbcache.c:148
ext4_evict_ea_inode+0x146/0x2e0 fs/ext4/xattr.c:444
ext4_evict_inode+0x19d/0x1150 fs/ext4/inode.c:181
evict+0x529/0x930 fs/inode.c:705
ext4_xattr_set_entry+0x183a/0x1fa0 fs/ext4/xattr.c:1798
ext4_xattr_block_set+0x1a92/0x3820 fs/ext4/xattr.c:1910
ext4_xattr_set_handle+0x1043/0x1560 fs/ext4/xattr.c:2395
ext4_xattr_set+0x26e/0x3d0 fs/ext4/xattr.c:2506
__vfs_setxattr+0x3e7/0x420 fs/xattr.c:182
__vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216
vfs_setxattr+0x21d/0x420 fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x250/0x2b0 fs/xattr.c:617
path_setxattr+0x1bc/0x2a0 fs/xattr.c:636
__do_sys_setxattr fs/xattr.c:652 [inline]
__se_sys_setxattr fs/xattr.c:648 [inline]
__x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7e7018e169
RSP: 002b:00007f7e6ffff038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f7e703b6160 RCX: 00007f7e7018e169
RDX: 0000200000000080 RSI: 0000200000000180 RDI: 00002000000000c0
RBP: 00007f7e70210a68 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000032 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f7e703b6160 R15: 00007ffd9e1c77b8
</TASK>
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d32e910 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d32f110 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6510
2 locks held by getty/4011:
#0: ffff88807e388098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000325e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x54a/0x1620 drivers/tty/n_tty.c:2198
1 lock held by syz-executor/4249:
2 locks held by syz-executor/4262:
#0: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#0: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f0/0x930 kernel/rcu/tree_exp.h:962
#1: ffff8880b8e3a998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
2 locks held by syz-executor/4376:
1 lock held by syz-executor/4399:
#0: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#0: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x360/0x930 kernel/rcu/tree_exp.h:962
5 locks held by kworker/u4:8/5422:
#0: ffff888017e16938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc900034e7d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#2: ffffffff8e544210 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x166/0xd20 net/core/net_namespace.c:594
#3: ffff88801f3472f8 (&devlink->lock_key#10){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x132/0x2f0 net/devlink/leftover.c:12500
#4: ffffffff8d333c40 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x5f0 kernel/rcu/tree.c:4019
3 locks held by syz.1.580/6743:
#0: ffff8880207d6460 (sb_writers#4){++++}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1: ffff888070be8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888070be8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x1dd/0x420 fs/xattr.c:308
#2: ffff888070be80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff888070be80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x270/0x1560 fs/ext4/xattr.c:2319
3 locks held by syz.1.580/6745:
#0: ffff8880207d6460 (sb_writers#4){++++}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1: ffff888070bec030 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888070bec030 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x1dd/0x420 fs/xattr.c:308
#2: ffff888070bebcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff888070bebcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x270/0x1560 fs/ext4/xattr.c:2319
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ca/0x430 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3612 Comm: klogd Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0x7c/0xe0 kernel/kcov.c:349
Code: c2 49 39 d2 74 71 4c 8b 74 d6 10 65 8b 05 e4 1d 78 7e 25 00 01 ff 00 74 11 3d 00 01 00 00 75 de 41 83 bb 1c 16 00 00 00 74 d4 <41> 8b 83 f8 15 00 00 83 f8 03 75 c8 49 8b 8b 00 16 00 00 45 8b bb
RSP: 0018:ffffc90003247658 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000075 RCX: 000000000000008b
RDX: 0000000000000002 RSI: ffffffff8e89e400 RDI: 0000000000000075
RBP: ffffc90003247770 R08: 0000000000000005 R09: ffffffff8aab2b35
R10: 000000000000000a R11: ffff88807c4f1dc0 R12: ffff0a1000000600
R13: ffff001000000600 R14: 0000000000000063 R15: 1ffffffff1619a59
FS: 00007f48d767b380(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa2435b6ca0 CR3: 000000007e5ff000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
format_decode+0xab5/0x1f10 lib/vsprintf.c:2615
vsnprintf+0x14d/0x1c70 lib/vsprintf.c:2757
sprintf+0xd6/0x120 lib/vsprintf.c:3009
print_time kernel/printk/printk.c:1274 [inline]
info_print_prefix+0x167/0x300 kernel/printk/printk.c:1300
record_print_text+0x142/0x430 kernel/printk/printk.c:1349
syslog_print+0x3d8/0x620 kernel/printk/printk.c:1560
do_syslog+0x819/0x910 kernel/printk/printk.c:1679
__do_sys_syslog kernel/printk/printk.c:1771 [inline]
__se_sys_syslog kernel/printk/printk.c:1769 [inline]
__x64_sys_syslog+0x78/0x90 kernel/printk/printk.c:1769
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f48d77dcfa7
Code: 73 01 c3 48 8b 0d 81 ce 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 ce 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007fffa19a7d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 00007f48d797b4a0 RCX: 00007f48d77dcfa7
RDX: 00000000000003ff RSI: 00007f48d797b4a0 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000005 R09: 30c3065a11fc9209
R10: 0000000000004000 R11: 0000000000000206 R12: 00007f48d797b4a0
R13: 00007f48d796b212 R14: 00007f48d797b51e R15: 00007f48d797b51e
</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.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Apr 19, 2025, 6:46:24 PM4/19/25
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 420102835862 Linux 6.1.134
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1005dfe4580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/91a5e36a108f/disk-42010283.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ec90f2faa77e/vmlinux-42010283.xz
kernel image: https://storage.googleapis.com/syzbot-assets/dce3af94d7be/bzImage-42010283.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/6690880ee5ac/mount_0.gz
fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=11a0b470580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+86129b...@syzkaller.appspotmail.com
INFO: task syz.2.1106:8809 blocked for more than 143 seconds.
ext4_xattr_set_handle+0xdac/0x1560 fs/ext4/xattr.c:2404
RSP: 002b:00007f25d2879038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f25d1bb5fa0 RCX: 00007f25d198e169
</TASK>
INFO: task syz.2.1106:8820 blocked for more than 143 seconds.
RIP: 0033:0x7f25d198e169
RSP: 002b:00007f25d2858038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f25d1bb6080 RCX: 00007f25d198e169
1 lock held by dhcpcd/3917:
#0: ffffffff8e550d68 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x29a/0x1ae0 net/ipv4/devinet.c:1081
2 locks held by getty/4006:
#0: ffff88803100f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#0: ffff8880b8f3a998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
#1: ffff8880b8f27788 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x419/0x790 kernel/sched/psi.c:999
4 locks held by kworker/u4:1/4305:
4 locks held by kworker/u4:3/4309:
#0: ffff888017c79138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc9000451fd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#2: ffffffff8e550d68 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:263
#3: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#3: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f0/0x930 kernel/rcu/tree_exp.h:962
2 locks held by kworker/0:5/4328:
#0: ffff888017c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc9000462fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
2 locks held by kworker/0:6/4331:
#0: ffff888017c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc9000469fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
3 locks held by kworker/0:9/4336:
#0: ffff888017c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc9000447fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#2: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#2: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x360/0x930 kernel/rcu/tree_exp.h:962
2 locks held by kworker/0:10/4415:
#0: ffff888017c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc90003497d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
3 locks held by syz.2.1106/8809:
#0: ffff888069bd4460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1: ffff888068e05440 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888068e05440 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x1dd/0x420 fs/xattr.c:308
#2: ffff888068e05108 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff888068e05108 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x270/0x1560 fs/ext4/xattr.c:2319
3 locks held by syz.2.1106/8820:
#0: ffff888069bd4460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1: ffff888055d03628 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888055d03628 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x1dd/0x420 fs/xattr.c:308
#2: ffff888055d032f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff888055d032f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x270/0x1560 fs/ext4/xattr.c:2319
1 lock held by syz-executor/16028:
#0: ffffffff8e550d68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8e550d68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7cb/0x1000 net/core/rtnetlink.c:6150
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.134-syzkaller #0
RIP: 0010:__bfs_backwards kernel/locking/lockdep.c:1842 [inline]
RIP: 0010:check_irq_usage kernel/locking/lockdep.c:2782 [inline]
RIP: 0010:check_prev_add kernel/locking/lockdep.c:3094 [inline]
RIP: 0010:check_prevs_add kernel/locking/lockdep.c:3209 [inline]
RIP: 0010:validate_chain+0x1dc0/0x5950 kernel/locking/lockdep.c:3825
Code: e1 ff 0f 00 00 89 0d 63 68 c5 11 2b 05 59 68 c5 11 25 ff 0f 00 00 39 05 8e 47 c0 0f 73 06 89 05 86 47 c0 0f 45 31 ed 4c 89 f8 <48> c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 0f 84 27 ff
RSP: 0018:ffffc90002f86f40 EFLAGS: 00000046
RAX: ffffffff93ba88c8 RBX: ffffffff933034b8 RCX: 000000000000018c
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90c5b5f0
RBP: ffffc90002f871f0 R08: dffffc0000000000 R09: fffffbfff225704d
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff93bbd8c8
R13: 0000000000000000 R14: ffffffff90c5b5d0 R15: ffffffff93ba88c8
FS: 00007f43e6ad6380(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
update_cfs_rq_load_avg kernel/sched/fair.c:4027 [inline]
update_load_avg+0x210/0x1540 kernel/sched/fair.c:4186
enqueue_entity+0x11c/0x1770 kernel/sched/fair.c:4772
enqueue_task_fair+0x228/0xb80 kernel/sched/fair.c:6120
enqueue_task+0x19d/0x2e0 kernel/sched/core.c:2059
activate_task kernel/sched/core.c:2087 [inline]
ttwu_do_activate+0x1b4/0x370 kernel/sched/core.c:3699
ttwu_queue kernel/sched/core.c:3904 [inline]
try_to_wake_up+0x6f6/0x1250 kernel/sched/core.c:4227
autoremove_wake_function+0x12/0x110 kernel/sched/wait.c:419
__wake_up_common+0x2a0/0x4e0 kernel/sched/wait.c:107
__wake_up_common_lock kernel/sched/wait.c:138 [inline]
__wake_up_sync_key+0x114/0x1c0 kernel/sched/wait.c:208
__unix_dgram_recvmsg+0x5ff/0x12c0 net/unix/af_unix.c:2454
sock_recvmsg_nosec net/socket.c:1022 [inline]
sock_recvmsg net/socket.c:1040 [inline]
sock_read_iter+0x3b2/0x4b0 net/socket.c:1121
call_read_iter include/linux/fs.h:2259 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x88d/0xbf0 fs/read_write.c:470
ksys_read+0x19c/0x2c0 fs/read_write.c:613
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff473b1e18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f43e6c2ab6a
RDX: 00000000000000ff RSI: 000056208baa3950 RDI: 0000000000000000
RBP: 000056208baa3910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f43e6dc93a3 R11: 0000000000000246 R12: 000056208baa398b
R13: 000056208baa3950 R14: 0000000000000000 R15: 00007f43e6e07a80
</TASK>
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
HEAD commit: 420102835862 Linux 6.1.134
git tree: linux-6.1.y
kernel config: https://syzkaller.appspot.com/x/.config?x=5b8d7e66d7963efe
dashboard link: https://syzkaller.appspot.com/bug?extid=86129b61506f3a4600ee
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15939b98580000
dashboard link: https://syzkaller.appspot.com/bug?extid=86129b61506f3a4600ee
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/91a5e36a108f/disk-42010283.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ec90f2faa77e/vmlinux-42010283.xz
kernel image: https://storage.googleapis.com/syzbot-assets/dce3af94d7be/bzImage-42010283.xz
fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=11a0b470580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+86129b...@syzkaller.appspotmail.com
Not tainted 6.1.134-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1106 state:D stack:24152 pid:8809 ppid:4377 flags:0x00004004
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
__wait_on_freeing_inode fs/inode.c:2286 [inline]
find_inode_fast+0x315/0x450 fs/inode.c:995
iget_locked+0xc7/0x830 fs/inode.c:1360
__ext4_iget+0x25d/0x3ee0 fs/ext4/inode.c:4831
ext4_xattr_inode_cache_find fs/ext4/xattr.c:1499 [inline]
ext4_xattr_inode_lookup_create+0x510/0x1ff0 fs/ext4/xattr.c:1538
ext4_xattr_block_set+0x26b/0x3820 fs/ext4/xattr.c:1867
<TASK>
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
__wait_on_freeing_inode fs/inode.c:2286 [inline]
find_inode_fast+0x315/0x450 fs/inode.c:995
iget_locked+0xc7/0x830 fs/inode.c:1360
__ext4_iget+0x25d/0x3ee0 fs/ext4/inode.c:4831
ext4_xattr_inode_cache_find fs/ext4/xattr.c:1499 [inline]
ext4_xattr_inode_lookup_create+0x510/0x1ff0 fs/ext4/xattr.c:1538
ext4_xattr_set_handle+0xdac/0x1560 fs/ext4/xattr.c:2404
ext4_xattr_set+0x26e/0x3d0 fs/ext4/xattr.c:2506
__vfs_setxattr+0x3e7/0x420 fs/xattr.c:182
__vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216
vfs_setxattr+0x21d/0x420 fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x250/0x2b0 fs/xattr.c:617
path_setxattr+0x1bc/0x2a0 fs/xattr.c:636
__do_sys_setxattr fs/xattr.c:652 [inline]
__se_sys_setxattr fs/xattr.c:648 [inline]
__x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f25d198e169
__vfs_setxattr+0x3e7/0x420 fs/xattr.c:182
__vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216
vfs_setxattr+0x21d/0x420 fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x250/0x2b0 fs/xattr.c:617
path_setxattr+0x1bc/0x2a0 fs/xattr.c:636
__do_sys_setxattr fs/xattr.c:652 [inline]
__se_sys_setxattr fs/xattr.c:648 [inline]
__x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RSP: 002b:00007f25d2879038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f25d1bb5fa0 RCX: 00007f25d198e169
RDX: 0000200000001400 RSI: 00002000000001c0 RDI: 0000200000000200
RBP: 00007f25d1a10a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000835 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f25d1bb5fa0 R15: 00007ffd6968bc98
</TASK>
INFO: task syz.2.1106:8820 blocked for more than 143 seconds.
Not tainted 6.1.134-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1106 state:D stack:26360 pid:8820 ppid:4377 flags:0x00004004
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
RSP: 002b:00007f25d2858038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f25d1bb6080 RCX: 00007f25d198e169
RDX: 0000200000000080 RSI: 0000200000000180 RDI: 00002000000000c0
RBP: 00007f25d1a10a68 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000032 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f25d1bb6080 R15: 00007ffd6968bc98
</TASK>
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d32e910 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d32f110 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6510
1 lock held by udevd/3623:
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d32e910 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d32f110 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6510
1 lock held by dhcpcd/3917:
#0: ffffffff8e550d68 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x29a/0x1ae0 net/ipv4/devinet.c:1081
2 locks held by getty/4006:
#0: ffff88803100f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000325e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x54a/0x1620 drivers/tty/n_tty.c:2198
2 locks held by syz-execprog/4277:
#0: ffff8880b8f3a998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
#1: ffff8880b8f27788 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x419/0x790 kernel/sched/psi.c:999
4 locks held by kworker/u4:1/4305:
#0: ffff888017e16938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc9000455fd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#2: ffffffff8e544210 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x166/0xd20 net/core/net_namespace.c:594
#3: ffffffff8e550d68 (rtnl_mutex){+.+.}-{3:3}, at: ip6_tnl_exit_batch_net+0xc0/0x610 net/ipv6/ip6_tunnel.c:2294
4 locks held by kworker/u4:3/4309:
#0: ffff888017c79138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc9000451fd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#2: ffffffff8e550d68 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:263
#3: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#3: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f0/0x930 kernel/rcu/tree_exp.h:962
2 locks held by kworker/0:5/4328:
#0: ffff888017c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc9000462fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
2 locks held by kworker/0:6/4331:
#0: ffff888017c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc9000469fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
3 locks held by kworker/0:9/4336:
#0: ffff888017c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc9000447fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#2: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#2: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x360/0x930 kernel/rcu/tree_exp.h:962
2 locks held by kworker/0:10/4415:
#0: ffff888017c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc90003497d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
3 locks held by syz.2.1106/8809:
#0: ffff888069bd4460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1: ffff888068e05440 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888068e05440 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x1dd/0x420 fs/xattr.c:308
#2: ffff888068e05108 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff888068e05108 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x270/0x1560 fs/ext4/xattr.c:2319
3 locks held by syz.2.1106/8820:
#0: ffff888069bd4460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1: ffff888055d03628 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888055d03628 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x1dd/0x420 fs/xattr.c:308
#2: ffff888055d032f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff888055d032f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x270/0x1560 fs/ext4/xattr.c:2319
1 lock held by syz-executor/16028:
#0: ffffffff8e550d68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8e550d68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7cb/0x1000 net/core/rtnetlink.c:6150
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ca/0x430 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Sending NMI from CPU 0 to CPUs 1:
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ca/0x430 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
NMI backtrace for cpu 1
CPU: 1 PID: 3605 Comm: syslogd Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__bfs kernel/locking/lockdep.c:-1 [inline]
RIP: 0010:__bfs_backwards kernel/locking/lockdep.c:1842 [inline]
RIP: 0010:check_irq_usage kernel/locking/lockdep.c:2782 [inline]
RIP: 0010:check_prev_add kernel/locking/lockdep.c:3094 [inline]
RIP: 0010:check_prevs_add kernel/locking/lockdep.c:3209 [inline]
RIP: 0010:validate_chain+0x1dc0/0x5950 kernel/locking/lockdep.c:3825
Code: e1 ff 0f 00 00 89 0d 63 68 c5 11 2b 05 59 68 c5 11 25 ff 0f 00 00 39 05 8e 47 c0 0f 73 06 89 05 86 47 c0 0f 45 31 ed 4c 89 f8 <48> c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 0f 84 27 ff
RSP: 0018:ffffc90002f86f40 EFLAGS: 00000046
RAX: ffffffff93ba88c8 RBX: ffffffff933034b8 RCX: 000000000000018c
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90c5b5f0
RBP: ffffc90002f871f0 R08: dffffc0000000000 R09: fffffbfff225704d
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff93bbd8c8
R13: 0000000000000000 R14: ffffffff90c5b5d0 R15: ffffffff93ba88c8
FS: 00007f43e6ad6380(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f1375a5000 CR3: 000000007fb70000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
update_cfs_rq_load_avg kernel/sched/fair.c:4027 [inline]
update_load_avg+0x210/0x1540 kernel/sched/fair.c:4186
enqueue_entity+0x11c/0x1770 kernel/sched/fair.c:4772
enqueue_task_fair+0x228/0xb80 kernel/sched/fair.c:6120
enqueue_task+0x19d/0x2e0 kernel/sched/core.c:2059
activate_task kernel/sched/core.c:2087 [inline]
ttwu_do_activate+0x1b4/0x370 kernel/sched/core.c:3699
ttwu_queue kernel/sched/core.c:3904 [inline]
try_to_wake_up+0x6f6/0x1250 kernel/sched/core.c:4227
autoremove_wake_function+0x12/0x110 kernel/sched/wait.c:419
__wake_up_common+0x2a0/0x4e0 kernel/sched/wait.c:107
__wake_up_common_lock kernel/sched/wait.c:138 [inline]
__wake_up_sync_key+0x114/0x1c0 kernel/sched/wait.c:208
__unix_dgram_recvmsg+0x5ff/0x12c0 net/unix/af_unix.c:2454
sock_recvmsg_nosec net/socket.c:1022 [inline]
sock_recvmsg net/socket.c:1040 [inline]
sock_read_iter+0x3b2/0x4b0 net/socket.c:1121
call_read_iter include/linux/fs.h:2259 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x88d/0xbf0 fs/read_write.c:470
ksys_read+0x19c/0x2c0 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f43e6c2ab6a
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff473b1e18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f43e6c2ab6a
RDX: 00000000000000ff RSI: 000056208baa3950 RDI: 0000000000000000
RBP: 000056208baa3910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f43e6dc93a3 R11: 0000000000000246 R12: 000056208baa398b
R13: 000056208baa3950 R14: 0000000000000000 R15: 00007f43e6e07a80
</TASK>
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
syzbot
Jan 7, 2026, 8:55:20 AM (2 days ago) Jan 7
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 50cbba13faa2 Linux 6.1.159
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1177fe9a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=31ea1cecaf34f0db
dashboard link: https://syzkaller.appspot.com/bug?extid=86129b61506f3a4600ee
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=152dc1fc580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=106e3e9a580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7ad0bd66715a/disk-50cbba13.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3284d626258e/vmlinux-50cbba13.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a1f92ca7bbfc/Image-50cbba13.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/e8444138a7f0/mount_0.gz
fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=169b6074580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+86129b...@syzkaller.appspotmail.com
INFO: task syz.0.54:4725 blocked for more than 143 seconds.
Not tainted syzkaller #0
Call trace:
__switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0xddc/0x1b18 kernel/sched/core.c:6561
schedule+0xc4/0x170 kernel/sched/core.c:6637
__wait_on_freeing_inode fs/inode.c:2286 [inline]
find_inode_fast+0x238/0x324 fs/inode.c:995
iget_locked+0xc8/0x7c4 fs/inode.c:1360
__ext4_iget+0x1dc/0x32b4 fs/ext4/inode.c:4858
ext4_xattr_inode_cache_find fs/ext4/xattr.c:1509 [inline]
ext4_xattr_inode_lookup_create+0x3e4/0x18c4 fs/ext4/xattr.c:1548
ext4_xattr_ibody_set+0x1b4/0x600 fs/ext4/xattr.c:2225
ext4_xattr_set_handle+0x900/0x102c fs/ext4/xattr.c:2402
ext4_xattr_set+0x1e0/0x2b4 fs/ext4/xattr.c:2516
ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38
__vfs_setxattr+0x388/0x3a4 fs/xattr.c:182
__vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216
__vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277
vfs_setxattr+0x158/0x2ac fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x228/0x28c fs/xattr.c:617
path_setxattr+0x12c/0x25c fs/xattr.c:636
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
INFO: task syz.0.54:4728 blocked for more than 143 seconds.
Not tainted syzkaller #0
Call trace:
__switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0xddc/0x1b18 kernel/sched/core.c:6561
schedule+0xc4/0x170 kernel/sched/core.c:6637
mb_cache_entry_wait_unused+0x13c/0x224 fs/mbcache.c:148
ext4_evict_ea_inode+0x130/0x2f0 fs/ext4/xattr.c:444
ext4_evict_inode+0x178/0x1270 fs/ext4/inode.c:181
evict+0x3c8/0x810 fs/inode.c:705
iput_final fs/inode.c:1834 [inline]
iput+0x764/0x7f4 fs/inode.c:1860
ext4_xattr_ibody_set+0x450/0x600 fs/ext4/xattr.c:2243
ext4_xattr_set_handle+0x900/0x102c fs/ext4/xattr.c:2402
ext4_xattr_set+0x1e0/0x2b4 fs/ext4/xattr.c:2516
ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38
__vfs_setxattr+0x388/0x3a4 fs/xattr.c:182
__vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216
__vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277
vfs_setxattr+0x158/0x2ac fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x228/0x28c fs/xattr.c:617
path_setxattr+0x12c/0x25c fs/xattr.c:636
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffff800015227d70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517
1 lock held by klogd/3925:
2 locks held by getty/4079:
#0: ffff0000d64cf098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff80002062b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf9c drivers/tty/n_tty.c:2198
3 locks held by syz.0.54/4725:
#0: ffff0000eb7e2460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000d76f8e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000d76f8e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000d76f8ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000d76f8ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.0.54/4728:
#0: ffff0000eb7e2460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea682c20 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea682c20 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea6828e8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea6828e8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.1.207/5455:
#0: ffff0000db078460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea7e4a38 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea7e4a38 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea7e4700 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea7e4700 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.1.207/5458:
#0: ffff0000db078460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea7e7258 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea7e7258 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea7e6f20 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea7e6f20 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.2.208/5479:
#0: ffff0000cb996460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea613628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea613628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea6132f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea6132f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.2.208/5483:
#0: ffff0000cb996460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea605e48 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea605e48 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea605b10 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea605b10 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.3.303/5938:
#0: ffff0000f09ac460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000d76fc030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000d76fc030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000d76fbcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000d76fbcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.3.303/5941:
#0: ffff0000f09ac460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000d766c030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000d766c030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000d766bcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000d766bcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.4.342/6152:
#0: ffff0000d9162460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea69b628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea69b628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea69b2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea69b2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.4.342/6155:
#0: ffff0000d9162460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea7e0400 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea7e0400 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea7e00c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea7e00c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.5.412/6512:
#0: ffff0000dd236460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000f14c8e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000f14c8e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000f14c8ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000f14c8ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.5.412/6515:
#0: ffff0000dd236460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000f1554030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000f1554030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000f1553cf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000f1553cf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.6.510/6986:
#0: ffff0000efcce460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000f14fb628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000f14fb628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000f14fb2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000f14fb2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.6.510/6989:
#0: ffff0000efcce460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea69ac20 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea69ac20 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea69a8e8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea69a8e8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.7.560/7250:
#0: ffff0000f2a58460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea7e0e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea7e0e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea7e0ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea7e0ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.7.560/7253:
#0: ffff0000f2a58460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000e2770e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000e2770e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000e2770ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000e2770ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
=============================================
HEAD commit: 50cbba13faa2 Linux 6.1.159
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1177fe9a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=31ea1cecaf34f0db
dashboard link: https://syzkaller.appspot.com/bug?extid=86129b61506f3a4600ee
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=152dc1fc580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=106e3e9a580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7ad0bd66715a/disk-50cbba13.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3284d626258e/vmlinux-50cbba13.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a1f92ca7bbfc/Image-50cbba13.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/e8444138a7f0/mount_0.gz
fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=169b6074580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+86129b...@syzkaller.appspotmail.com
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.54 state:D stack:0 pid:4725 ppid:4448 flags:0x00000001
Call trace:
__switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0xddc/0x1b18 kernel/sched/core.c:6561
schedule+0xc4/0x170 kernel/sched/core.c:6637
__wait_on_freeing_inode fs/inode.c:2286 [inline]
find_inode_fast+0x238/0x324 fs/inode.c:995
iget_locked+0xc8/0x7c4 fs/inode.c:1360
__ext4_iget+0x1dc/0x32b4 fs/ext4/inode.c:4858
ext4_xattr_inode_cache_find fs/ext4/xattr.c:1509 [inline]
ext4_xattr_inode_lookup_create+0x3e4/0x18c4 fs/ext4/xattr.c:1548
ext4_xattr_ibody_set+0x1b4/0x600 fs/ext4/xattr.c:2225
ext4_xattr_set_handle+0x900/0x102c fs/ext4/xattr.c:2402
ext4_xattr_set+0x1e0/0x2b4 fs/ext4/xattr.c:2516
ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38
__vfs_setxattr+0x388/0x3a4 fs/xattr.c:182
__vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216
__vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277
vfs_setxattr+0x158/0x2ac fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x228/0x28c fs/xattr.c:617
path_setxattr+0x12c/0x25c fs/xattr.c:636
__do_sys_setxattr fs/xattr.c:652 [inline]
__se_sys_setxattr fs/xattr.c:648 [inline]
__arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:648
__se_sys_setxattr fs/xattr.c:648 [inline]
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
INFO: task syz.0.54:4728 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.54 state:D stack:0 pid:4728 ppid:4448 flags:0x00000001
Call trace:
__switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0xddc/0x1b18 kernel/sched/core.c:6561
schedule+0xc4/0x170 kernel/sched/core.c:6637
mb_cache_entry_wait_unused+0x13c/0x224 fs/mbcache.c:148
ext4_evict_ea_inode+0x130/0x2f0 fs/ext4/xattr.c:444
ext4_evict_inode+0x178/0x1270 fs/ext4/inode.c:181
evict+0x3c8/0x810 fs/inode.c:705
iput_final fs/inode.c:1834 [inline]
iput+0x764/0x7f4 fs/inode.c:1860
ext4_xattr_ibody_set+0x450/0x600 fs/ext4/xattr.c:2243
ext4_xattr_set_handle+0x900/0x102c fs/ext4/xattr.c:2402
ext4_xattr_set+0x1e0/0x2b4 fs/ext4/xattr.c:2516
ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38
__vfs_setxattr+0x388/0x3a4 fs/xattr.c:182
__vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216
__vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277
vfs_setxattr+0x158/0x2ac fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x228/0x28c fs/xattr.c:617
path_setxattr+0x12c/0x25c fs/xattr.c:636
__do_sys_setxattr fs/xattr.c:652 [inline]
__se_sys_setxattr fs/xattr.c:648 [inline]
__arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:648
__se_sys_setxattr fs/xattr.c:648 [inline]
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
1 lock held by rcu_tasks_trace/13:
#0: ffff800015228590 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffff800015227400 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349
1 lock held by klogd/3925:
2 locks held by getty/4079:
#0: ffff0000d64cf098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff80002062b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf9c drivers/tty/n_tty.c:2198
3 locks held by syz.0.54/4725:
#0: ffff0000eb7e2460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000d76f8e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000d76f8e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000d76f8ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000d76f8ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.0.54/4728:
#0: ffff0000eb7e2460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea682c20 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea682c20 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea6828e8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea6828e8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.1.207/5455:
#0: ffff0000db078460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea7e4a38 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea7e4a38 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea7e4700 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea7e4700 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.1.207/5458:
#0: ffff0000db078460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea7e7258 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea7e7258 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea7e6f20 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea7e6f20 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.2.208/5479:
#0: ffff0000cb996460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea613628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea613628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea6132f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea6132f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.2.208/5483:
#0: ffff0000cb996460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea605e48 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea605e48 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea605b10 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea605b10 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.3.303/5938:
#0: ffff0000f09ac460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000d76fc030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000d76fc030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000d76fbcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000d76fbcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.3.303/5941:
#0: ffff0000f09ac460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000d766c030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000d766c030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000d766bcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000d766bcf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.4.342/6152:
#0: ffff0000d9162460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea69b628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea69b628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea69b2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea69b2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.4.342/6155:
#0: ffff0000d9162460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea7e0400 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea7e0400 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea7e00c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea7e00c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.5.412/6512:
#0: ffff0000dd236460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000f14c8e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000f14c8e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000f14c8ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000f14c8ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.5.412/6515:
#0: ffff0000dd236460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000f1554030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000f1554030 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000f1553cf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000f1553cf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.6.510/6986:
#0: ffff0000efcce460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000f14fb628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000f14fb628 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000f14fb2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000f14fb2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.6.510/6989:
#0: ffff0000efcce460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea69ac20 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea69ac20 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea69a8e8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea69a8e8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.7.560/7250:
#0: ffff0000f2a58460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000ea7e0e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000ea7e0e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000ea7e0ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000ea7e0ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
3 locks held by syz.7.560/7253:
#0: ffff0000f2a58460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000e2770e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000e2770e08 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308
#2: ffff0000e2770ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000e2770ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x102c fs/ext4/xattr.c:2329
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