INFO: task syz-executor.1:11620 blocked for more than 144 seconds.
      Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:28848 pid:11620 ppid:3645   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5178 [inline]
 __schedule+0xadf/0x5270 kernel/sched/core.c:6490
 schedule+0xda/0x1b0 kernel/sched/core.c:6566
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x1ca/0x5c0 kernel/sched/completion.c:106
 __flush_work+0x58d/0xae0 kernel/workqueue.c:3073
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3160
 p9_conn_destroy net/9p/trans_fd.c:890 [inline]
 p9_fd_close+0x328/0x580 net/9p/trans_fd.c:920
 p9_client_create+0x97a/0x1070 net/9p/client.c:1001
 v9fs_session_init+0x1e2/0x1810 fs/9p/v9fs.c:408
 v9fs_mount+0xba/0xc90 fs/9p/vfs_super.c:126
 legacy_get_tree+0x105/0x220 fs/fs_context.c:610
 vfs_get_tree+0x89/0x2f0 fs/super.c:1530
 do_new_mount fs/namespace.c:3040 [inline]
 path_mount+0x1326/0x1e20 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f42a2a8b5a9
RSP: 002b:00007f42a3b27168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f42a2bac050 RCX: 00007f42a2a8b5a9
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 00007f42a2ae6580 R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffef7f7c7bf R14: 00007f42a3b27300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xbf9/0xf30 kernel/hung_task.c:377
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2972 Comm: udevd Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:check_preemption_disabled+0x4c/0x170 lib/smp_processor_id.c:19
Code: 81 e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b 5d 41 5c 41 5d 41 5e c3 0f 1f 44 00 00 9c <5b> 81 e3 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 74 d3
RSP: 0018:ffffc90003457e58 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1101736758f
RDX: 00000000000276a0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff8a4964c0 R08: 0000000000000001 R09: ffffffff8f53604f
R10: ffffffff8f536057 R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff8a496480 R14: ffff8880172020c0 R15: ffff888017202828
FS:  00007f3fd13c2840(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa679bad0b0 CR3: 000000001d280000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 account_steal_time kernel/sched/cputime.c:209 [inline]
 steal_account_process_time kernel/sched/cputime.c:258 [inline]
 account_other_time kernel/sched/cputime.c:276 [inline]
 get_vtime_delta kernel/sched/cputime.c:671 [inline]
 vtime_account_system+0x1de/0x530 kernel/sched/cputime.c:681
 vtime_user_enter+0xaa/0x170 kernel/sched/cputime.c:725
 __ct_user_enter+0x19f/0x1d0 kernel/context_tracking.c:489
 user_enter_irqoff include/linux/context_tracking.h:42 [inline]
 __exit_to_user_mode kernel/entry/common.c:132 [inline]
 syscall_exit_to_user_mode+0x43/0x50 kernel/entry/common.c:296
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3fd0f27277
Code: 73 01 c3 48 8b 0d 01 dc 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 59 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d d1 db 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffef3c8ee28 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffea RBX: 00007ffef3c8ee38 RCX: 00007f3fd0f27277
RDX: 0000000000000400 RSI: 00007ffef3c8ee38 RDI: 00007ffef3c8f318
RBP: 0000000000000400 R08: 0000000007ffffff R09: 0000561354110250
R10: 00007f3fd0fb4fc0 R11: 0000000000000246 R12: 00007ffef3c8f318
R13: 00007ffef3c8f288 R14: 00005613540e52c0 R15: 0000000000000000
 </TASK>