INFO: task syz-executor:5857 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:18608 pid:5857  tgid:5857  ppid:1      task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 v9fs_evict_inode+0x170/0x320
 evict+0x504/0x9c0
 __dentry_kill+0x209/0x660
 dput+0x19f/0x2b0
 shrink_dcache_for_umount+0xa0/0x170
 generic_shutdown_super+0x67/0x2c0
 kill_anon_super+0x3b/0x70
 v9fs_kill_super+0x4c/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f019518ff17
RSP: 002b:00007ffd117bfdc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f0195211c05 RCX: 00007f019518ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd117bfe80
RBP: 00007ffd117bfe80 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd117c0f10
R13: 00007f0195211c05 R14: 00000000000303b2 R15: 00007ffd117c0f50
 </TASK>
INFO: lockdep is turned off.
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: 26 Comm: kworker/u9:0 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
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20
Code: 56 5c 79 0a e9 61 06 00 00 90 f3 0f 1e fa 0f 1f 00 fc 6a ff e8 11 05 00 00 48 89 c4 48 89 e7 e8 66 5b 79 0a e9 41 06 00 00 90 <f3> 0f 1e fa 0f 1f 00 fc 6a ff e8 f1 04 00 00 48 89 c4 48 89 e7 e8
RSP: 0018:ffffc900001ef918 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000022 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff88802580d9f0
RBP: 000000000000008e R08: ffff88801cad0000 R09: 0000000000000003
R10: 000000000000002e R11: 0000000000000000 R12: 1ffff11004b01b49
R13: 000000000000006c R14: ffff88802580d980 R15: ffff88803a52c000
FS:  0000000000000000(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555776815c8 CR3: 000000003db1c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
RIP: 0010:skb_put+0xe5/0x210
Code: 0f b6 04 14 84 c0 0f 85 d3 00 00 00 41 89 ae c8 00 00 00 49 8d 7e 70 48 89 f8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 df 00 00 00 <45> 01 6e 70 4d 8d a6 cc 00 00 00 4c 89 e0 48 c1 e8 03 0f b6 04 10
RSP: 0018:ffffc900001ef948 EFLAGS: 00000246
 nsim_dev_trap_report_work+0x67f/0xb80
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
