INFO: task syz.2.1400:12423 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1400      state:D stack:25128 pid:12423 tgid:12422 ppid:11822  task_flags:0x400040 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
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x4da/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f933cb8ebe9
RSP: 002b:00007f933d936038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f933cdc5fa0 RCX: 00007f933cb8ebe9
RDX: 000000000000ee00 RSI: 0000200000000240 RDI: ffffffff80000800
RBP: 00007f933cc11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000080 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f933cdc6038 R14: 00007f933cdc5fa0 R15: 00007ffe46e5b8c8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by klogd/5286:
 #0: ffff88804b039f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
 #1: ffff88804b024008 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
 #2: ffff88810e948a28 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0x67/0x12b0
2 locks held by getty/5674:
 #0: ffff88810f50d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
3 locks held by syz-executor/5850:
1 lock held by syz.2.1400/12423:
 #0: ffff8880223520e0 (&type->s_umount_key#78){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz.1.2004/15061:
1 lock held by syz.1.2004/15062:
 #0: ffff888037e900a8 (&ctx->uring_lock){+.+.}-{4:4}, at: io_handle_tw_list+0x1a7/0x4c0

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

NMI backtrace for cpu 1
CPU: 1 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+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 15061 Comm: syz.1.2004 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:lock_acquire+0x5f/0x360
Code: 89 44 24 58 0f 1f 44 00 00 65 8b 05 1f 63 03 11 83 f8 08 0f 83 b8 01 00 00 89 c0 48 0f a3 05 08 38 06 0e 73 16 e8 71 02 09 00 <84> c0 75 0d f6 05 c9 1d f0 0d 01 0f 84 d7 01 00 00 83 3d 19 69 06
RSP: 0018:ffffc9002396f4c8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: fee7f61b61ad6800
RDX: 0000000000000000 RSI: ffffffff8be33860 RDI: ffffffff8be33820
RBP: ffffffff849e1200 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f472a7 R12: 0000000000000002
R13: ffffffff8e139f20 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f23d5be16c0(0000) GS:ffff8880b8614000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558f6385c8 CR3: 0000000033974000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 af_alg_wmem_wakeup+0xcd/0x440
 skcipher_recvmsg+0x1147/0x11c0
 sock_recvmsg+0x22c/0x270
 sock_read_iter+0x231/0x2f0
 __io_read+0x6f9/0x14f0
 io_read+0x1c/0x60
 __io_issue_sqe+0x181/0x4b0
 io_issue_sqe+0x165/0xfd0
 io_req_task_submit+0x10b/0x1d0
 io_handle_tw_list+0x350/0x4c0
 tctx_task_work_run+0x99/0x370
 tctx_task_work+0x3f/0x90
 task_work_run+0x1d4/0x260
 get_signal+0x11ed/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f23d4d8ebe9
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:00007f23d5be1038 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000004000 RBX: 00007f23d4fc6090 RCX: 00007f23d4d8ebe9
RDX: 0000000000000000 RSI: 00000000100847c0 RDI: 0000000000000006
RBP: 00007f23d4e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f23d4fc6128 R14: 00007f23d4fc6090 R15: 00007ffd78c0a398
 </TASK>
