INFO: task syz-executor.5:17503 blocked for more than 143 seconds.
      Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:28408 pid:17503 ppid:3637   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5194 [inline]
 __schedule+0xbd2/0x55b0 kernel/sched/core.c:6506
 schedule+0xda/0x1b0 kernel/sched/core.c:6582
 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:891 [inline]
 p9_fd_close+0x328/0x580 net/9p/trans_fd.c:921
 p9_client_destroy+0xbe/0x370 net/9p/client.c:1040
 p9_client_create+0x728/0xf20 net/9p/client.c:1027
 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: 0033:0x7f6b8f88b5a9
RSP: 002b:00007f6b909a5168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6b8f9ac050 RCX: 00007f6b8f88b5a9
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 00007f6b8f8e6580 R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff06a8c63f R14: 00007f6b909a5300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.0.0-rc6-next-20220923-syzkaller #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+0x24/0x18a lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xc6b/0xfc0 kernel/hung_task.c:369
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3920 Comm: syz-fuzzer Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline]
RIP: 0010:trace_irq_disable_rcuidle include/trace/events/preemptirq.h:36 [inline]
RIP: 0010:trace_hardirqs_off kernel/trace/trace_preemptirq.c:82 [inline]
RIP: 0010:trace_hardirqs_off+0x3c/0x150 kernel/trace/trace_preemptirq.c:74
Code: 20 80 7e 85 c0 75 19 65 c7 05 7c 20 80 7e 01 00 00 00 65 8b 05 55 59 7f 7e a9 00 00 f0 00 74 05 5b 5d 41 5c c3 48 8b 6c 24 18 <66> 90 eb f2 65 8b 1d d1 03 7f 7e 48 c7 c0 00 69 e0 8d 48 ba 00 00
RSP: 0000:ffffc90005f27e30 EFLAGS: 00000046
RAX: 0000000080000000 RBX: 0000000000000200 RCX: 0000000000000000
RDX: ffff8880250f9d40 RSI: ffffffff81b48a25 RDI: ffffffff81b48a2a
RBP: ffffffff81b48a2a R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000200 R11: 0000000000000001 R12: ffff88813fe30000
R13: ffffc90005f27f58 R14: ffff8880250f9d40 R15: ffff8880778f8740
FS:  000000c00cb22890(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c006a023dc CR3: 0000000026b19000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 count_memcg_events include/linux/memcontrol.h:1059 [inline]
 count_memcg_event_mm.part.0+0x29a/0x2d0 include/linux/memcontrol.h:1093
 count_memcg_event_mm include/linux/memcontrol.h:562 [inline]
 handle_mm_fault+0xcf/0x780 mm/memory.c:5184
 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1428
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x94/0x170 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x466572
Code: 66 89 07 66 89 44 1f fe c3 89 07 89 44 1f fc c3 48 89 07 c3 48 89 07 48 89 44 1f f8 c3 f3 44 0f 7f 3f f3 44 0f 7f 7c 1f f0 c3 <f3> 44 0f 7f 3f f3 44 0f 7f 7f 10 f3 44 0f 7f 7c 1f e0 f3 44 0f 7f
RSP: 002b:000000c005a33c88 EFLAGS: 00010287
RAX: 0000000000000000 RBX: 0000000000000024 RCX: 0000000000000c00
RDX: 000000c006a023dc RSI: 0000000000000001 RDI: 000000c006a023dc
RBP: 000000c005a33ce8 R08: 00007f61c10af108 R09: 0000000000000000
R10: 00007f619c0d1770 R11: 0000000000000000 R12: 000000c006a01800
R13: 0000000000000001 R14: 000000c0000921a0 R15: ffffffffffffffff
 </TASK>