INFO: task syz.7.1767:21442 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.1767      state:D stack:25432 pid:21442 tgid:21441 ppid:20760  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x360
 cgroup_lock_and_drain_offline+0x51a/0x650
 cgroup1_get_tree+0x9d/0x890
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x319/0xdc0
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8bac79ce59
RSP: 002b:00007f8bad57b028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f8baca15fa0 RCX: 00007f8bac79ce59
RDX: 0000200000000340 RSI: 0000200000000200 RDI: 0000000000000000
RBP: 00007f8bac832e6f R08: 0000200000000580 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8baca16038 R14: 00007f8baca15fa0 R15: 00007ffc204043c8
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 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+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x380
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 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: 14011 Comm: syz.7.979 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:kasan_quarantine_put+0x20/0x1f0
Code: 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 41 57 41 56 41 55 41 54 53 49 89 fe e8 ab e8 ff ff 48 85 c0 74 4e 48 89 c3 9c 41 5f <fa> 41 f7 c7 00 02 00 00 74 05 e8 b1 9e 9a ff e8 ac d1 7e 09 89 c0
RSP: 0018:ffffc90003cdf730 EFLAGS: 00000286
RAX: ffff88810eab6760 RBX: ffff88810eab6760 RCX: 0000000000000000
RDX: ffff88810eab6760 RSI: ffff88810eab6760 RDI: ffff888100041640
RBP: 0000000000000000 R08: 00000000166556aa R09: 00000000a9006334
R10: 000000000000000a R11: ffffffff81b12860 R12: ffff88810eab6760
R13: 0000000000000000 R14: ffff888100041640 R15: 0000000000000286
FS:  00007f208e19e6c0(0000) GS:ffff8882a922d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 000000010f0d2000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 kfree+0x1c5/0x640
 fuse_perform_write+0xe57/0x1c60
 fuse_file_write_iter+0xd74/0x11a0
 vfs_write+0x612/0xba0
 ksys_write+0x150/0x270
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f208d39ce59
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:00007f208e19e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f208d615fa0 RCX: 00007f208d39ce59
RDX: 0000000000000028 RSI: 0000200000000200 RDI: 0000000000000007
RBP: 00007f208d432e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f208d616038 R14: 00007f208d615fa0 R15: 00007fffed6f4408
 </TASK>
