syzbot

INFO: task kworker/u4:4:356 blocked for more than 143 seconds.
      Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:4    D27504   356      2 0x80004000
Workqueue: netns cleanup_net
Call Trace:
 context_switch kernel/sched/core.c:3367 [inline]
 __schedule+0x805/0xc90 kernel/sched/core.c:4083
 schedule+0x188/0x220 kernel/sched/core.c:4158
 schedule_timeout+0x43/0x250 kernel/time/timer.c:1874
 mark_held_locks kernel/locking/lockdep.c:3628 [inline]
 __trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline]
 lockdep_hardirqs_on+0x4a4/0x8a0 kernel/locking/lockdep.c:3702
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
 _raw_spin_unlock_irq+0x1f/0x80 kernel/locking/spinlock.c:199
 do_wait_for_common+0x232/0x370 kernel/sched/completion.c:85
 console_conditional_schedule+0x30/0x30
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x43/0x50 kernel/sched/completion.c:138
 __flush_work+0xca/0x120 kernel/workqueue.c:3045
 start_flush_work+0x730/0x730 kernel/workqueue.c:3017
 flush_all_backlogs net/core/dev.c:5527 [inline]
 rollback_registered_many+0x6ac/0x1450 net/core/dev.c:8813
 unregister_netdevice_many+0x46/0x260 net/core/dev.c:9990
 ip_tunnel_delete_nets+0x2d4/0x310 net/ipv4/ip_tunnel.c:1105
 ip_tunnel_delete_nets+0x2e5/0x310 net/ipv4/ip_tunnel.c:1109
 vti_init_net+0xf0/0xf0 net/ipv4/ip_vti.c:456
 ops_exit_list net/core/net_namespace.c:189 [inline]
 cleanup_net+0x78c/0xb80 net/core/net_namespace.c:603
 process_one_work+0x76e/0xfd0 kernel/workqueue.c:2268
 worker_thread+0xa7f/0x1450 kernel/workqueue.c:2414
 kthread+0x353/0x380 kernel/kthread.c:268
 rcu_lock_release+0x20/0x20 include/linux/rcupdate.h:213
 kthread_blkcg+0xd0/0xd0 kernel/kthread.c:1247
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
INFO: task kworker/1:4:3470 blocked for more than 143 seconds.
      Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:4     D27344  3470      2 0x80004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 context_switch kernel/sched/core.c:3367 [inline]
 __schedule+0x805/0xc90 kernel/sched/core.c:4083
 schedule+0x188/0x220 kernel/sched/core.c:4158
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217
 __mutex_lock_common+0x129f/0x2fc0 kernel/locking/mutex.c:1033
 addrconf_dad_work+0x61/0x1d00 net/ipv6/addrconf.c:4043
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 addrconf_dad_work+0x61/0x1d00 net/ipv6/addrconf.c:4043
 lock_is_held include/linux/lockdep.h:406 [inline]
 rcu_read_lock_sched_held+0x106/0x170 kernel/rcu/update.c:121
 process_one_work+0x76e/0xfd0 kernel/workqueue.c:2268
 worker_thread+0xa7f/0x1450 kernel/workqueue.c:2414
 kthread+0x353/0x380 kernel/kthread.c:268
 rcu_lock_release+0x20/0x20 include/linux/rcupdate.h:213
 kthread_blkcg+0xd0/0xd0 kernel/kthread.c:1247
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
INFO: task syz-executor.0:9329 blocked for more than 143 seconds.
      Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28464  9329   7023 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3367 [inline]
 __schedule+0x805/0xc90 kernel/sched/core.c:4083
 schedule+0x188/0x220 kernel/sched/core.c:4158
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217
 __mutex_lock_common+0x129f/0x2fc0 kernel/locking/mutex.c:1033
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 do_vfs_ioctl+0x6ea/0x1a00 fs/ioctl.c:749
 sock_ioctl+0x4aa/0x690 net/socket.c:1204
 sock_poll+0x2f0/0x2f0 include/linux/compiler.h:199
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:771 [inline]
 __do_sys_ioctl fs/ioctl.c:780 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:778
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
INFO: task syz-executor.0:9366 blocked for more than 143 seconds.
      Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D29136  9366   7023 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3367 [inline]
 __schedule+0x805/0xc90 kernel/sched/core.c:4083
 schedule+0x188/0x220 kernel/sched/core.c:4158
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217
 __mutex_lock_common+0x129f/0x2fc0 kernel/locking/mutex.c:1033
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 do_vfs_ioctl+0x6ea/0x1a00 fs/ioctl.c:749
 sock_ioctl+0x4aa/0x690 net/socket.c:1204
 sock_poll+0x2f0/0x2f0 include/linux/compiler.h:199
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:771 [inline]
 __do_sys_ioctl fs/ioctl.c:780 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:778
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
INFO: task syz-executor.2:9353 blocked for more than 144 seconds.
      Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D29120  9353   7211 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3367 [inline]
 __schedule+0x805/0xc90 kernel/sched/core.c:4083
 schedule+0x188/0x220 kernel/sched/core.c:4158
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217
 __mutex_lock_common+0x129f/0x2fc0 kernel/locking/mutex.c:1033
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 do_vfs_ioctl+0x6ea/0x1a00 fs/ioctl.c:749
 sock_ioctl+0x4aa/0x690 net/socket.c:1204
 sock_poll+0x2f0/0x2f0 include/linux/compiler.h:199
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:771 [inline]
 __do_sys_ioctl fs/ioctl.c:780 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:778
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
INFO: task syz-executor.1:9352 blocked for more than 144 seconds.
      Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D29136  9352   7153 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3367 [inline]
 __schedule+0x805/0xc90 kernel/sched/core.c:4083
 schedule+0x188/0x220 kernel/sched/core.c:4158
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217
 __mutex_lock_common+0x129f/0x2fc0 kernel/locking/mutex.c:1033
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 do_vfs_ioctl+0x6ea/0x1a00 fs/ioctl.c:749
 sock_ioctl+0x4aa/0x690 net/socket.c:1204
 sock_poll+0x2f0/0x2f0 include/linux/compiler.h:199
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:771 [inline]
 __do_sys_ioctl fs/ioctl.c:780 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:778
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
INFO: task syz-executor.1:9355 blocked for more than 144 seconds.
      Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28896  9355   7153 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3367 [inline]
 __schedule+0x805/0xc90 kernel/sched/core.c:4083
 schedule+0x188/0x220 kernel/sched/core.c:4158
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217
 __mutex_lock_common+0x129f/0x2fc0 kernel/locking/mutex.c:1033
 dev_ioctl+0x4c3/0xc70 net/core/dev_ioctl.c:495
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 dev_ioctl+0x4c3/0xc70 net/core/dev_ioctl.c:495
 sock_do_ioctl+0x169/0x260 net/socket.c:1076
 sock_ioctl+0x4aa/0x690 net/socket.c:1204
 sock_poll+0x2f0/0x2f0 include/linux/compiler.h:199
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:771 [inline]
 __do_sys_ioctl fs/ioctl.c:780 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:778
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
INFO: task syz-executor.1:9373 blocked for more than 144 seconds.
      Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D29136  9373   7153 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3367 [inline]
 __schedule+0x805/0xc90 kernel/sched/core.c:4083
 schedule+0x188/0x220 kernel/sched/core.c:4158
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217
 __mutex_lock_common+0x129f/0x2fc0 kernel/locking/mutex.c:1033
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 do_vfs_ioctl+0x6ea/0x1a00 fs/ioctl.c:749
 sock_ioctl+0x4aa/0x690 net/socket.c:1204
 sock_poll+0x2f0/0x2f0 include/linux/compiler.h:199
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:771 [inline]
 __do_sys_ioctl fs/ioctl.c:780 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:778
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
INFO: task syz-executor.1:9377 blocked for more than 144 seconds.
      Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D29136  9377   7153 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3367 [inline]
 __schedule+0x805/0xc90 kernel/sched/core.c:4083
 schedule+0x188/0x220 kernel/sched/core.c:4158
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217
 __mutex_lock_common+0x129f/0x2fc0 kernel/locking/mutex.c:1033
 dev_ioctl+0x4c3/0xc70 net/core/dev_ioctl.c:495
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 dev_ioctl+0x4c3/0xc70 net/core/dev_ioctl.c:495
 sock_do_ioctl+0x169/0x260 net/socket.c:1076
 sock_ioctl+0x4aa/0x690 net/socket.c:1204
 sock_poll+0x2f0/0x2f0 include/linux/compiler.h:199
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:771 [inline]
 __do_sys_ioctl fs/ioctl.c:780 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:778
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
INFO: task syz-executor.4:9359 blocked for more than 144 seconds.
      Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D29136  9359   7469 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3367 [inline]
 __schedule+0x805/0xc90 kernel/sched/core.c:4083
 schedule+0x188/0x220 kernel/sched/core.c:4158
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217
 __mutex_lock_common+0x129f/0x2fc0 kernel/locking/mutex.c:1033
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 sock_do_ioctl+0x11e/0x260 net/socket.c:1066
 do_vfs_ioctl+0x6ea/0x1a00 fs/ioctl.c:749
 sock_ioctl+0x4aa/0x690 net/socket.c:1204
 sock_poll+0x2f0/0x2f0 include/linux/compiler.h:199
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:771 [inline]
 __do_sys_ioctl fs/ioctl.c:780 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:778
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3

Showing all locks held in the system:
5 locks held by kworker/u4:4/356:
 #0: ffff8880a9bb4938 ((wq_completion)netns){+.+.}-{0:0}, at: spin_unlock_irq include/linux/spinlock.h:403 [inline]
 #0: ffff8880a9bb4938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x6df/0xfd0 kernel/workqueue.c:2241
 #1: ffffc90002067d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x71e/0xfd0 kernel/workqueue.c:2243
 #2: ffffffff895ac530 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xac/0xb80 net/core/net_namespace.c:565
 #3: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_delete_nets+0x7b/0x310 net/ipv4/ip_tunnel.c:1104
 #4: ffffffff892d86d8 (cpu_hotplug_lock){++++}-{0:0}, at: get_online_cpus include/linux/cpu.h:143 [inline]
 #4: ffffffff892d86d8 (cpu_hotplug_lock){++++}-{0:0}, at: flush_all_backlogs net/core/dev.c:5520 [inline]
 #4: ffffffff892d86d8 (cpu_hotplug_lock){++++}-{0:0}, at: rollback_registered_many+0x4dd/0x1450 net/core/dev.c:8813
1 lock held by khungtaskd/1140:
 #0: ffffffff892e85d0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 net/mptcp/pm_netlink.c:860
3 locks held by kworker/1:4/3470:
 #0: ffff888214cd6938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: spin_unlock_irq include/linux/spinlock.h:403 [inline]
 #0: ffff888214cd6938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6df/0xfd0 kernel/workqueue.c:2241
 #1: ffffc900032afd80 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x71e/0xfd0 kernel/workqueue.c:2243
 #2: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x61/0x1d00 net/ipv6/addrconf.c:4043
1 lock held by in:imklog/6704:
 #0: ffff8880999e7bb0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x25d/0x2f0 fs/file.c:826
1 lock held by syz-executor.1/8939:
 #0: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:704 [inline]
 #0: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3c/0x130 drivers/net/tun.c:3413
1 lock held by syz-executor.0/9329:
 #0: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x11e/0x260 net/socket.c:1066
1 lock held by syz-executor.0/9366:
 #0: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x11e/0x260 net/socket.c:1066
1 lock held by syz-executor.2/9353:
 #0: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x11e/0x260 net/socket.c:1066
1 lock held by syz-executor.1/9352:
 #0: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x11e/0x260 net/socket.c:1066
1 lock held by syz-executor.1/9355:
 #0: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x4c3/0xc70 net/core/dev_ioctl.c:495
1 lock held by syz-executor.1/9373:
 #0: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x11e/0x260 net/socket.c:1066
1 lock held by syz-executor.1/9377:
 #0: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x4c3/0xc70 net/core/dev_ioctl.c:495
1 lock held by syz-executor.4/9359:
 #0: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x11e/0x260 net/socket.c:1066
1 lock held by syz-executor.3/9380:
 #0: ffffffff895ae218 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x11e/0x260 net/socket.c:1066

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1140 Comm: khungtaskd Not tainted 5.7.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1e9/0x30e lib/dump_stack.c:118
 nmi_cpu_backtrace+0x9f/0x180 lib/nmi_backtrace.c:101
 arch_trigger_cpumask_backtrace+0x10/0x10 arch/x86/kernel/apic/hw_nmi.c:38
 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
 watchdog+0xd2a/0xd40 kernel/hung_task.c:289
 kthread+0x353/0x380 kernel/kthread.c:268
 hungtask_pm_notify+0x50/0x50 kernel/hung_task.c:265
 kthread_blkcg+0xd0/0xd0 kernel/kthread.c:1247
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9309 Comm: syz-executor.5 Not tainted 5.7.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:debug_lockdep_rcu_enabled+0x2/0xe0 kernel/rcu/update.c:274
Code: 74 2c 51 00 eb cf 66 90 8a 05 6a 8b 0b 08 c3 66 0f 1f 84 00 00 00 00 00 e8 eb bc 00 00 e9 e6 bd 00 00 66 0f 1f 44 00 00 41 57 <41> 56 53 48 c7 c0 24 c0 6b 89 48 c1 e8 03 49 bf 00 00 00 00 00 fc
RSP: 0018:ffffc90006cdfd18 EFLAGS: 00000286
RAX: ffffffff81d37ef8 RBX: ffff8880a30b1110 RCX: 0000000000040000
RDX: 0000000000000000 RSI: 0000000000001c93 RDI: ffffffff88e934c8
RBP: ffff8880a30b1160 R08: dffffc0000000000 R09: ffffed1014616261
R10: ffffed1014616261 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888089dca5e8 R14: 0000000000000000 R15: 1ffff1101461622c
FS:  00007fd2789d3700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcf7eacdd8 CR3: 000000009ee52000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ___might_sleep+0x1f/0x570 kernel/sched/core.c:6766
 io_ring_ctx_wait_and_kill+0xbe/0x820 fs/io_uring.c:7315
 io_uring_flush+0xba0/0xba0 fs/io_uring.c:7407
 io_uring_release+0x59/0x70 fs/io_uring.c:7337
 __fput+0x2ed/0x750 fs/file_table.c:280
 task_work_run+0x147/0x1d0 kernel/task_work.c:123
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:165 [inline]
 prepare_exit_to_usermode+0x48e/0x600 arch/x86/entry/common.c:196
 syscall_return_slowpath+0xf9/0x420 arch/x86/entry/common.c:278
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca29
Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd2789d2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00000000004dac40 RCX: 000000000045ca29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000078 R14: 00000000005255f2 R15: 00007fd2789d36d4