INFO: task syz.8.309:8350 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.309       state:D stack:27064 pid:8350  tgid:8348  ppid:8082   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 __iterate_supers+0x126/0x290
 ksys_sync+0x94/0x150
 __ia32_sys_sync+0xe/0x20
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa85f18eba9
RSP: 002b:00007fa8600d7038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fa85f3d6090 RCX: 00007fa85f18eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fa85f3d6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa85f3d6128 R14: 00007fa85f3d6090 R15: 00007ffc9ae167e8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e33c560 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by kworker/u10:5/4536:
 #0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90004867ba0 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
2 locks held by getty/5671:
 #0: ffff888022af90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000291b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
3 locks held by syz-executor/5844:
1 lock held by syz.8.309/8350:
 #0: ffff88811b0520e0 (&type->s_umount_key#71){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz-executor/10950:
6 locks held by syz.1.731/11480:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf60/0xfa0
 kthread+0x711/0x8a0
 ret_from_fork+0x47f/0x820
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10950 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:trace_irq_disable+0x30/0x110
Code: 8b 05 f8 96 fb 10 83 f8 08 73 3c 89 c3 c1 e8 06 48 8d 3c c5 30 ce c3 8f be 08 00 00 00 e8 28 5d 5c 00 48 0f a3 1d d0 64 fc 0d <73> 12 e8 69 ef de ff 84 c0 75 09 80 3d c6 53 e6 0d 00 74 0f 5b 41
RSP: 0018:ffffc900066c7368 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff81c76958
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fc3ce30
RBP: ffffc900066c7450 R08: ffffffff8fc3ce37 R09: 1ffffffff1f879c6
R10: dffffc0000000000 R11: fffffbfff1f879c7 R12: 000000000000001f
R13: dffffc0000000000 R14: ffff888105d18d00 R15: 0000000000000a06
FS:  0000555587e8e500(0000) GS:ffff8881a39f0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa618a8a000 CR3: 000000012c9b8000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 memcg1_uncharge_batch+0xfb/0x1d0
 uncharge_batch+0x19e/0x250
 __mem_cgroup_uncharge_folios+0x142/0x1c0
 folios_put_refs+0x57c/0x670
 shmem_undo_range+0x49e/0x14b0
 shmem_evict_inode+0x272/0xa70
 evict+0x504/0x9c0
 __dentry_kill+0x209/0x660
 dput+0x19f/0x2b0
 __fput+0x68e/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f03bbf8fed7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 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 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc38e936f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f03bc011c05 RCX: 00007f03bbf8fed7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc38e937b0
RBP: 00007ffc38e937b0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc38e94840
R13: 00007f03bc011c05 R14: 0000000000053527 R15: 00007ffc38e94880
 </TASK>
