INFO: task udevd:4931 blocked for more than 143 seconds.
      Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:24320 pid:4931  tgid:4931  ppid:2546   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xcda/0x2f80 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
 device_lock include/linux/device.h:1009 [inline]
 uevent_show+0x188/0x3b0 drivers/base/core.c:2743
 dev_attr_show+0x53/0xe0 drivers/base/core.c:2437
 sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59
 seq_read_iter+0x4fa/0x12c0 fs/seq_file.c:230
 kernfs_fop_read_iter+0x41a/0x590 fs/kernfs/file.c:279
 new_sync_read fs/read_write.c:395 [inline]
 vfs_read+0x869/0xbd0 fs/read_write.c:476
 ksys_read+0x12f/0x260 fs/read_write.c:619
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0764fbcb6a
RSP: 002b:00007ffd82ba7ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055c68fd10b40 RCX: 00007f0764fbcb6a
RDX: 0000000000001000 RSI: 000055c68fd11100 RDI: 0000000000000008
RBP: 000055c68fd10b40 R08: 0000000000000008 R09: 0000000000000004
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffd82ba83c8 R15: 000000000000000a
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6620
2 locks held by getty/2604:
 #0: ffff8881067170a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
3 locks held by kworker/1:4/4929:
4 locks held by udevd/4931:
 #0: ffff888125f12540 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
 #1: ffff888107b70088 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
 #2: ffff888113ee84b8 (kn->active#3){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
 #3: ffff88811765d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #3: ffff88811765d190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
5 locks held by kworker/1:0/11110:
3 locks held by kworker/1:2/18424:
6 locks held by kworker/0:1/27559:

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xf4e/0x1280 kernel/hung_task.c:379
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 3960 Comm: syz.1.8077 Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:cfs_rq_of kernel/sched/sched.h:1480 [inline]
RIP: 0010:enqueue_task_fair+0xaa2/0x16a0 kernel/sched/fair.c:6790
Code: 49 c1 ea 03 41 80 3c 02 00 0f 85 34 09 00 00 48 8b bb 78 01 00 00 4c 89 4c 24 10 e8 28 f7 04 00 4c 8b 4c 24 10 e9 65 fa ff ff <49> bc 00 00 00 00 00 fc ff df 8b 5c 24 04 4c 8b 6c 24 38 49 8d bf
RSP: 0018:ffffc90003467ae8 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff88810c700400 RCX: ffff8881315d8090
RDX: 0000000000000000 RSI: ffff88810c700440 RDI: ffff8881315d8110
RBP: ffff88810c700848 R08: 0000000000000001 R09: 0000000000000001
R10: ffff8881f623d740 R11: 0000000000000000 R12: ffff8881315d8120
R13: ffff8881315dd780 R14: dffffc0000000000 R15: ffff88810c700800
FS:  00007fc6534216c0(0000) GS:ffff8881f6200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056348adbb900 CR3: 00000001242c6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 activate_task kernel/sched/core.c:2009 [inline]
 ttwu_do_activate+0x146/0x780 kernel/sched/core.c:3582
 ttwu_queue kernel/sched/core.c:3846 [inline]
 try_to_wake_up+0x53a/0x10b0 kernel/sched/core.c:4167
 wake_up_process kernel/sched/core.c:4299 [inline]
 wake_up_q+0x91/0x140 kernel/sched/core.c:1029
 futex_wake+0x43e/0x4e0 kernel/futex/waitwake.c:199
 do_futex+0x1e5/0x350 kernel/futex/syscalls.c:107
 __do_sys_futex kernel/futex/syscalls.c:179 [inline]
 __se_sys_futex kernel/futex/syscalls.c:160 [inline]
 __x64_sys_futex+0x1e1/0x4c0 kernel/futex/syscalls.c:160
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc6547a99f9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc6534210e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fc654945f88 RCX: 00007fc6547a99f9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fc654945f8c
RBP: 00007fc654945f80 R08: 00007fc65462a080 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007fc654945f8c
R13: 0000000000000000 R14: 00007fff42a0b9b0 R15: 00007fff42a0ba98
 </TASK>