INFO: task syz.0.916:8387 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.916       state:D stack:24952 pid:8387  tgid:8387  ppid:5832   task_flags:0x400040 flags:0x00080003
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 __fuse_simple_request+0x121f/0x1c60
 fuse_flush+0x66a/0x8a0
 filp_flush+0xbd/0x190
 filp_close+0x1d/0x40
 __se_sys_close_range+0x372/0x670
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd815f9acb9
RSP: 002b:00007fffbac305c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007fd816217da0 RCX: 00007fd815f9acb9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd816217da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007fd816217cb0 R11: 0000000000000246 R12: 0000000000028325
R13: 00007fd816215fac R14: 000000000002805d R15: 00007fffbac306d0
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e35a360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5653:
 #0: ffff888112b6c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
3 locks held by syz.4.2542/12629:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 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: 12629 Comm: syz.4.2542 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:___sys_recvmsg+0x170/0x590
Code: 66 43 c7 44 2f 08 00 00 43 c6 44 2f 0a 00 ba 38 00 00 00 48 89 df 31 f6 e8 5d 2a e4 f8 ba 38 00 00 00 48 89 df 48 8b 74 24 18 <e8> 7b 1b 53 fb 48 89 c3 31 ff 48 89 c6 e8 4e d0 7c f8 48 85 db 4c
RSP: 0018:ffffc90008d7fa40 EFLAGS: 00000246
RAX: ffffc90008d7faa0 RBX: ffffc90008d7faa0 RCX: 0000000000000000
RDX: 0000000000000038 RSI: 00002000002cf3c0 RDI: ffffc90008d7faa0
RBP: ffffc90008d7fc30 R08: ffffc90008d7fad7 R09: 0000000000000000
R10: ffffc90008d7faa0 R11: fffff520011aff5b R12: ffffc90008d7fba0
R13: dffffc0000000000 R14: f8f8f8f8f8f8f8f8 R15: 1ffff920011aff50
FS:  00007f60b31956c0(0000) GS:ffff88818e324000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb8229e8400 CR3: 000000011449a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 do_recvmmsg+0x334/0x800
 __x64_sys_recvmmsg+0x198/0x250
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f60b239acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f60b3195028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f60b2616090 RCX: 00007f60b239acb9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000004
RBP: 00007f60b2408bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f60b2616128 R14: 00007f60b2616090 R15: 00007ffcc05f8608
 </TASK>
