INFO: task syz-executor.0:15606 blocked for more than 143 seconds.
Not tainted 6.1.0-syzkaller-13139-gf9ff5644bcc0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:23304 pid:15606 ppid:5102 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x995/0xe20 kernel/sched/core.c:6555
schedule+0xcb/0x190 kernel/sched/core.c:6631
request_wait_answer fs/fuse/dev.c:407 [inline]
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x1034/0x1870 fs/fuse/dev.c:511
fuse_do_getattr+0x396/0xf90 fs/fuse/dir.c:1119
vfs_getattr fs/stat.c:164 [inline]
vfs_statx+0x1ba/0x4a0 fs/stat.c:236
vfs_fstatat fs/stat.c:270 [inline]
__do_sys_newfstatat fs/stat.c:440 [inline]
__se_sys_newfstatat+0xed/0x7d0 fs/stat.c:434
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3f8508c0d9
RSP: 002b:00007f3f85e25168 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007f3f851abf80 RCX: 00007f3f8508c0d9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: ffffffffffffff9c
RBP: 00007f3f850e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeeafebbff R14: 00007f3f85e25300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d326e50 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d327650 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8d326c80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
3 locks held by kworker/1:2/897:
#0: ffff888012864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1:
ffffc900055bfd00
((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
#2: ffffffff8d32c2f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#2: ffffffff8d32c2f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x455/0x860 kernel/rcu/tree_exp.h:946
2 locks held by getty/4750:
#0: ffff888027ea5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.5/5120:
#0: ffff8880883220e0 (&type->s_umount_key#58){++++}-{3:3}, at: deactivate_super+0x96/0xd0 fs/super.c:362
3 locks held by kworker/1:4/5164:
#0: ffff888012864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1: ffffc9000554fd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
#2: ffffffff8d32c2f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#2: ffffffff8d32c2f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x384/0x860 kernel/rcu/tree_exp.h:946
2 locks held by kworker/1:6/5167:
#0: ffff888012866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1: ffffc9000558fd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
2 locks held by kworker/u4:20/5294:
5 locks held by kworker/u4:23/5297:
2 locks held by kworker/u4:25/5300:
#0: ffff8880b993a1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:537
#1: ffff8880b9927748 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x611/0x9a0 kernel/sched/psi.c:976
2 locks held by kworker/0:21/11430:
#0: ffff888012864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1: ffffc900031dfd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
3 locks held by udevd/16048:
1 lock held by syz-executor.3/16695:
4 locks held by syz-executor.0/16697:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.0-syzkaller-13139-gf9ff5644bcc0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ba/0x420 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+0xcd5/0xd20 kernel/hung_task.c:377
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5120 Comm: syz-executor.5 Not tainted 6.1.0-syzkaller-13139-gf9ff5644bcc0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:remove_class_from_lock_chain kernel/locking/lockdep.c:5958 [inline]
RIP: 0010:remove_class_from_lock_chains kernel/locking/lockdep.c:5997 [inline]
RIP: 0010:zap_class+0x2da/0x810 kernel/locking/lockdep.c:6039
Code: 49 8b 07 4c 8d 78 f8 48 85 c0 4c 0f 44 f8 4d 85 ff 74 9d 4d 89 fd 49 c1 ed 03 43 8a 44 35 00 84 c0 0f 85 21 02 00 00 41 8b 1f c3 fc 0f 84 f2 01 00 00 48 c1 eb 08 66 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc90004e0fb28 EFLAGS: 00000046
RAX: ffffffff90985600 RBX: 000000000424d324 RCX: ffffffff816c6a54
RDX: 0000000000000001 RSI: 000000000007364c RDI: 0000000000073649
RBP: 000000000000035d R08: dffffc0000000000 R09: fffffbfff23f8077
R10: fffffbfff23f8077 R11: 1ffffffff23f8076 R12: 0000000000000b8d
R13: 1ffffffff2130ad8 R14: dffffc0000000000 R15: ffffffff909856c0
FS: 00005555558d5400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00079d000 CR3: 000000002d321000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lockdep_free_key_range kernel/locking/lockdep.c:6158 [inline]
lockdep_unregister_key+0x440/0x5b0 kernel/locking/lockdep.c:6354
wq_unregister_lockdep kernel/workqueue.c:3497 [inline]
destroy_workqueue+0x85a/0xed0 kernel/workqueue.c:4464
xfs_destroy_mount_workqueues+0x3b/0x100 fs/xfs/xfs_super.c:583
xfs_fs_put_super+0x245/0x2d0 fs/xfs/xfs_super.c:1122
generic_shutdown_super+0x130/0x310 fs/super.c:492
kill_block_super+0x79/0xd0 fs/super.c:1386
deactivate_locked_super+0xa7/0xf0 fs/super.c:332
cleanup_mnt+0x494/0x520 fs/namespace.c:1291
task_work_run+0x243/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7e8848d547
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd548abb58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f7e8848d547
RDX: 00007ffd548abc2b RSI: 000000000000000a RDI: 00007ffd548abc20
RBP: 00007ffd548abc20 R08: 00000000ffffffff R09: 00007ffd548ab9f0
R10: 00005555558d68b3 R11: 0000000000000246 R12: 00007f7e884e6b24
R13: 00007ffd548acce0 R14: 00005555558d6810 R15: 00007ffd548acd20