INFO: task kworker/u4:1:27837 blocked for more than 143 seconds.
      Not tainted 6.7.0-syzkaller-02320-gacc657692aed #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:1    state:D stack:25792 pid:27837 tgid:27837 ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5399 [inline]
 __schedule+0xf12/0x5c00 kernel/sched/core.c:6726
 __schedule_loop kernel/sched/core.c:6801 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6816
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6873
 rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
 __down_write_common+0x948/0x1400 kernel/locking/rwsem.c:1306
 rdma_dev_exit_net+0x178/0x590 drivers/infiniband/core/device.c:1123
 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:170
 cleanup_net+0x505/0xb20 net/core/net_namespace.c:614
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.7.0-syzkaller-02320-gacc657692aed #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xf87/0x1210 kernel/hung_task.c:379
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 14697 Comm: syz-executor.5 Not tainted 6.7.0-syzkaller-02320-gacc657692aed #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:_raw_spin_unlock_irqrestore+0xe/0x70 kernel/locking/spinlock.c:193
Code: 75 85 c0 74 02 5b c3 e8 d0 20 78 f6 5b c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 55 48 89 f5 53 48 8b 74 24 10 <48> 89 fb 48 83 c7 18 e8 96 ed de f6 48 89 df e8 8e 65 df f6 f7 c5
RSP: 0018:ffffc9000aadfc90 EFLAGS: 00000082
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9001b877000
RDX: ffffc9000aadfe70 RSI: ffffffff8163c7cf RDI: ffff888045364298
RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffff88804427d940 R12: 0000000000000000
R13: 0000000000000246 R14: 0000000008000001 R15: 7fffffffffffffff
FS:  00007f915fd486c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000b80e80 CR3: 0000000056b4b000 CR4: 00000000003506f0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 __wake_up_common_lock kernel/sched/wait.c:108 [inline]
 __wake_up+0x3f/0x50 kernel/sched/wait.c:127
 io_cqring_wake io_uring/io_uring.h:251 [inline]
 io_cqring_wake io_uring/io_uring.h:238 [inline]
 io_cq_unlock_post+0xed/0x190 io_uring/io_uring.c:681
 __io_cqring_overflow_flush+0x3e2/0x570 io_uring/io_uring.c:731
 io_cqring_do_overflow_flush io_uring/io_uring.c:739 [inline]
 io_cqring_wait io_uring/io_uring.c:2651 [inline]
 __do_sys_io_uring_enter+0x1fcc/0x2690 io_uring/io_uring.c:3757
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f915f07cd29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f915fd480c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007f915f1abf80 RCX: 00007f915f07cd29
RDX: 0000000000400000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f915f0c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f915f1abf80 R15: 00007ffcaf1f1dc8
 </TASK>