INFO: task syz-executor248:3908 blocked for more than 143 seconds.
      Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor248 state:D stack:27192 pid: 3908 ppid:  3608 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5183 [inline]
 __schedule+0x957/0xe20 kernel/sched/core.c:6495
 schedule+0xcb/0x190 kernel/sched/core.c:6571
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1911
 do_wait_for_common+0x3ea/0x560 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
 __flush_work+0x124/0x1a0 kernel/workqueue.c:3073
 __cancel_work_timer+0x517/0x6a0 kernel/workqueue.c:3160
 p9_conn_destroy net/9p/trans_fd.c:885 [inline]
 p9_fd_close+0x24d/0x410 net/9p/trans_fd.c:920
 p9_client_destroy+0xc8/0x610 net/9p/client.c:1018
 v9fs_session_close+0x4d/0x200 fs/9p/v9fs.c:504
 v9fs_kill_super+0x58/0x90 fs/9p/vfs_super.c:226
 deactivate_locked_super+0xa7/0xf0 fs/super.c:331
 v9fs_mount+0xa86/0xcb0 fs/9p/vfs_super.c:207
 legacy_get_tree+0xea/0x180 fs/fs_context.c:610
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x289/0xad0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff6d2797ca9
RSP: 002b:00007ff6d27492f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff6d281f4c0 RCX: 00007ff6d2797ca9
RDX: 0000000020000200 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007ff6d281f4cc R08: 0000000020000600 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff6d27ed06c
R13: 0030656c69662f2e R14: 64663d736e617274 R15: 00007ff6d281f4c8
 </TASK>
INFO: task syz-executor248:4048 blocked for more than 143 seconds.
      Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor248 state:D stack:27288 pid: 4048 ppid:  3606 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5183 [inline]
 __schedule+0x957/0xe20 kernel/sched/core.c:6495
 schedule+0xcb/0x190 kernel/sched/core.c:6571
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1911
 do_wait_for_common+0x3ea/0x560 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
 __flush_work+0x124/0x1a0 kernel/workqueue.c:3073
 __cancel_work_timer+0x517/0x6a0 kernel/workqueue.c:3160
 p9_conn_destroy net/9p/trans_fd.c:885 [inline]
 p9_fd_close+0x24d/0x410 net/9p/trans_fd.c:920
 p9_client_destroy+0xc8/0x610 net/9p/client.c:1018
 v9fs_session_close+0x4d/0x200 fs/9p/v9fs.c:504
 v9fs_kill_super+0x58/0x90 fs/9p/vfs_super.c:226
 deactivate_locked_super+0xa7/0xf0 fs/super.c:331
 v9fs_mount+0xa86/0xcb0 fs/9p/vfs_super.c:207
 legacy_get_tree+0xea/0x180 fs/fs_context.c:610
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x289/0xad0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff6d2797ca9
RSP: 002b:00007ff6d27492f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff6d281f4c0 RCX: 00007ff6d2797ca9
RDX: 0000000020000200 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007ff6d281f4cc R08: 0000000020000600 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff6d27ed06c
R13: 0030656c69662f2e R14: 64663d736e617274 R15: 00007ff6d281f4c8
 </TASK>
INFO: task syz-executor248:14596 blocked for more than 144 seconds.
      Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor248 state:D stack:27192 pid:14596 ppid:  3609 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5183 [inline]
 __schedule+0x957/0xe20 kernel/sched/core.c:6495
 schedule+0xcb/0x190 kernel/sched/core.c:6571
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1911
 do_wait_for_common+0x3ea/0x560 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
 __flush_work+0x124/0x1a0 kernel/workqueue.c:3073
 __cancel_work_timer+0x517/0x6a0 kernel/workqueue.c:3160
 p9_conn_destroy net/9p/trans_fd.c:885 [inline]
 p9_fd_close+0x24d/0x410 net/9p/trans_fd.c:920
 p9_client_destroy+0xc8/0x610 net/9p/client.c:1018
 v9fs_session_close+0x4d/0x200 fs/9p/v9fs.c:504
 v9fs_kill_super+0x58/0x90 fs/9p/vfs_super.c:226
 deactivate_locked_super+0xa7/0xf0 fs/super.c:331
 v9fs_mount+0xa86/0xcb0 fs/9p/vfs_super.c:207
 legacy_get_tree+0xea/0x180 fs/fs_context.c:610
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x289/0xad0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff6d2797ca9
RSP: 002b:00007ff6d27492f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff6d281f4c0 RCX: 00007ff6d2797ca9
RDX: 0000000020000200 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007ff6d281f4cc R08: 0000000020000600 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff6d27ed06c
R13: 0030656c69662f2e R14: 64663d736e617274 R15: 00007ff6d281f4c8
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #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+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x47c/0x4b0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x169/0x280 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+0xcd5/0xd20 kernel/hung_task.c:369
 kthread+0x266/0x300 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: 9 Comm: kworker/u4:0 Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue:  0x0 (events_unbound)
RIP: 0010:preempt_count_sub+0x2/0x160 kernel/sched/core.c:5666
Code: c7 c1 d8 14 27 8e 80 e1 07 80 c1 03 38 c1 0f 8c 7a ff ff ff 48 c7 c7 d8 14 27 8e e8 38 80 80 00 e9 69 ff ff ff 0f 1f 00 41 56 <53> 89 fb 48 c7 c0 40 6f 7b 91 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc900000e79a0 EFLAGS: 00000086
RAX: 0000000000000001 RBX: ffff8880b9a39c40 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffffc900000e7b38 R08: dffffc0000000000 R09: ffffed1017347389
R10: ffffed1017347389 R11: 1ffff11017347388 R12: dffffc0000000000
R13: 1ffff9200001cf54 R14: ffff8880123b0000 R15: ffff8880b9a39c40
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff6d27ece88 CR3: 000000000ca8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x24/0x40 kernel/locking/spinlock.c:186
 newidle_balance+0x40b/0xfb0 kernel/sched/fair.c:11156
 pick_next_task_fair+0x2a4/0xdf0 kernel/sched/fair.c:7482
 __pick_next_task kernel/sched/core.c:5805 [inline]
 pick_next_task+0xf1/0x1e60 kernel/sched/core.c:5880
 __schedule+0x538/0xe20 kernel/sched/core.c:6459
 schedule+0xcb/0x190 kernel/sched/core.c:6571
 worker_thread+0xfbf/0x1330 kernel/workqueue.c:2457
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>