INFO: task syz-executor.1:18929 blocked for more than 144 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.1  state:D stack:27712 pid:18929 ppid:18781  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
 v9fs_session_close+0x45/0x2d0 fs/9p/v9fs.c:504
 v9fs_kill_super+0x49/0x90 fs/9p/vfs_super.c:226
 deactivate_locked_super+0x94/0x160 fs/super.c:331
 v9fs_mount+0x7d4/0xc90 fs/9p/vfs_super.c:207
 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: 0033:0x7fd250c8b5a9
RSP: 002b:00007fd251df7168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fd250dac050 RCX: 00007fd250c8b5a9
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 00007fd250ce6580 R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd6200f1cf R14: 00007fd251df7300 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: 17909 Comm: kworker/u4:35 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:put_prev_entity+0x0/0x4c0 kernel/sched/fair.c:4891
Code: 44 24 08 e8 72 2f 71 00 48 8b 44 24 08 e9 2d ff ff ff e8 53 2f 71 00 e9 6c ff ff ff 4c 89 ff e8 46 2f 71 00 e9 b1 fe ff ff 90 <48> b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 49 89 fd 41 54 4c
RSP: 0018:ffffc900081679c0 EFLAGS: 00000046
RAX: 1ffff1100528f01f RBX: ffff888029478080 RCX: ffffffff898e200d
RDX: 1ffffffff17470fc RSI: ffff888029478080 RDI: ffff8880b9a3a040
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8de06717
R10: fffffbfff1bc0ce2 R11: ffff8880b9a3ab58 R12: 0000000000000000
R13: 00000000000218b0 R14: ffff8880b9a39f80 R15: 0000000003047ce9
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 000000000bc8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 put_prev_task_fair+0x32/0x60 kernel/sched/fair.c:7685
 pick_next_task kernel/sched/core.c:5930 [inline]
 __schedule+0x13f6/0x55b0 kernel/sched/core.c:6470
 schedule+0xda/0x1b0 kernel/sched/core.c:6582
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
 toggle_allocation_gate mm/kfence/core.c:807 [inline]
 toggle_allocation_gate+0x305/0x390 mm/kfence/core.c:792
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>