syzbot


INFO: task hung in __lru_add_drain_all

Status: upstream: reported on 2024/05/17 20:43
Reported-by: syzbot+96373a7d83fc81843a24@syzkaller.appspotmail.com
First crash: 28d, last: 28d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: task hung in __lru_add_drain_all 1 419d 419d 0/3 auto-obsoleted due to no activity on 2023/08/21 02:18
upstream INFO: task hung in __lru_add_drain_all (2) mm 119 20h55m 28d 0/27 upstream: reported on 2024/05/17 22:28
upstream INFO: task hung in __lru_add_drain_all net C done error 71 216d 1016d 0/27 auto-obsoleted due to no activity on 2024/02/20 10:46

Sample crash report:
INFO: task syz-executor.2:3570 blocked for more than 143 seconds.
      Not tainted 6.1.91-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:21016 pid:3570  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1941
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x350/0x610 kernel/sched/completion.c:138
 __flush_work+0x95b/0xad0 kernel/workqueue.c:3076
 __lru_add_drain_all+0x669/0x7d0 mm/swap.c:918
 invalidate_bdev+0x8f/0xb0 block/bdev.c:86
 ext4_put_super+0x96d/0x10e0 fs/ext4/super.c:1281
 generic_shutdown_super+0x130/0x340 fs/super.c:501
 kill_block_super+0x7a/0xe0 fs/super.c:1459
 deactivate_locked_super+0xa0/0x110 fs/super.c:332
 cleanup_mnt+0x490/0x520 fs/namespace.c:1186
 task_work_run+0x246/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7efe33a7e217
RSP: 002b:00007ffc9a8842a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007efe33a7e217
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc9a884360
RBP: 00007ffc9a884360 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc9a885420
R13: 00007efe33ac8336 R14: 000000000004c68c R15: 0000000000000003
 </TASK>
INFO: task kworker/u4:5:3596 blocked for more than 143 seconds.
      Not tainted 6.1.91-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:5    state:D stack:22816 pid:3596  ppid:2      flags:0x00004000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1941
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x350/0x610 kernel/sched/completion.c:138
 __synchronize_srcu+0x2b7/0x360 kernel/rcu/srcutree.c:1243
 fsnotify_mark_destroy_workfn+0x142/0x340 fs/notify/mark.c:898
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task kworker/u4:6:3660 blocked for more than 144 seconds.
      Not tainted 6.1.91-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:6    state:D stack:20544 pid:3660  ppid:2      flags:0x00004000
Workqueue: events_unbound fsnotify_connector_destroy_workfn
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1941
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x350/0x610 kernel/sched/completion.c:138
 __synchronize_srcu+0x2b7/0x360 kernel/rcu/srcutree.c:1243
 fsnotify_connector_destroy_workfn+0x40/0xa0 fs/notify/mark.c:208
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task syz-executor.3:8847 blocked for more than 144 seconds.
      Not tainted 6.1.91-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:27112 pid:8847  ppid:5814   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1941
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x350/0x610 kernel/sched/completion.c:138
 __synchronize_srcu+0x2b7/0x360 kernel/rcu/srcutree.c:1243
 kvm_swap_active_memslots+0x2ed/0x3d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1593
 kvm_activate_memslot arch/x86/kvm/../../../virt/kvm/kvm_main.c:1715 [inline]
 kvm_create_memslot arch/x86/kvm/../../../virt/kvm/kvm_main.c:1781 [inline]
 kvm_set_memslot+0x5d8/0x1160 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1893
 __kvm_set_memory_region+0x80b/0x9d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2035
 kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:2048 [inline]
 kvm_vm_ioctl_set_memory_region+0x6d/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2060
 kvm_vm_ioctl+0x922/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4741
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1787e7cee9
RSP: 002b:00007f1788caf0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1787fabf80 RCX: 00007f1787e7cee9
RDX: 0000000020000180 RSI: 000000004020ae46 RDI: 0000000000000004
RBP: 00007f1787ec949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1787fabf80 R15: 00007ffca0d44898
 </TASK>
INFO: task syz-executor.1:8858 blocked for more than 145 seconds.
      Not tainted 6.1.91-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:25832 pid:8858  ppid:3946   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1941
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x350/0x610 kernel/sched/completion.c:138
 __flush_work+0x95b/0xad0 kernel/workqueue.c:3076
 flush_work kernel/workqueue.c:3097 [inline]
 flush_delayed_work+0x14b/0x1a0 kernel/workqueue.c:3221
 fsnotify_destroy_group+0x210/0x330 fs/notify/group.c:76
 inotify_release+0x41/0x70 fs/notify/inotify/inotify_user.c:309
 __fput+0x3b7/0x890 fs/file_table.c:320
 task_work_run+0x246/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f660027bdda
RSP: 002b:00007fff91c6fb30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f660027bdda
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fff91c6fc08 R08: 00007f6600200000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000293 R12: 000000000004df7a
R13: 00007f66003abf8c R14: 00007f66003abf80 R15: 0000000000000032
 </TASK>
INFO: task syz-executor.0:8874 blocked for more than 146 seconds.
      Not tainted 6.1.91-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:25832 pid:8874  ppid:5685   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1941
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x350/0x610 kernel/sched/completion.c:138
 __synchronize_srcu+0x2b7/0x360 kernel/rcu/srcutree.c:1243
 mmu_notifier_unregister+0x2be/0x3b0 mm/mmu_notifier.c:854
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1322 [inline]
 kvm_put_kvm+0xca3/0x18a0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1370
 kvm_vcpu_release+0x53/0x60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3856
 __fput+0x3b7/0x890 fs/file_table.c:320
 task_work_run+0x246/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6579a7bdda
RSP: 002b:00007ffe55c25cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007f6579a7bdda
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007ffe55c25d98 R08: 00007f6579a00000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000293 R12: 000000000004eea0
R13: 00007f6579babf8c R14: 00007f6579babf80 R15: 0000000000000032
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8d12ae50 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8d12b650 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
 #0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 #0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
 #0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
2 locks held by kworker/u4:2/33:
2 locks held by getty/3310:
 #0: ffff88801427f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2188
2 locks held by syz-executor.2/3570:
 #0: ffff888055ce20e0 (&type->s_umount_key#31){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:362
 #1: ffffffff8d1d1f48 (lock#3){+.+.}-{3:3}, at: __lru_add_drain_all+0x66/0x7d0 mm/swap.c:873
2 locks held by kworker/u4:5/3596:
 #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #1: ffffc9000437fd20 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
6 locks held by kworker/0:5/3620:
2 locks held by kworker/u4:6/3660:
 #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #1: ffffc90004627d20 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
6 locks held by kworker/0:14/4324:
2 locks held by syz-executor.4/8826:
1 lock held by syz-executor.3/8847:
 #0: ffffc9000337b0a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:2047 [inline]
 #0: ffffc9000337b0a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_vm_ioctl_set_memory_region+0x62/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2060
1 lock held by syz-executor.3/8921:
 #0: ffffc900037c10a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:2047 [inline]
 #0: ffffc900037c10a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_vm_ioctl_set_memory_region+0x62/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2060
1 lock held by syz-executor.3/8923:
 #0: ffffc900037c10a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:2047 [inline]
 #0: ffffc900037c10a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_vm_ioctl_set_memory_region+0x62/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2060

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.91-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xf88/0xfd0 kernel/hung_task.c:377
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8826 Comm: syz-executor.4 Not tainted 6.1.91-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:lock_is_held_type+0x1/0x180 kernel/locking/lockdep.c:5690
Code: 75 d6 48 c7 c7 60 00 ec 8a 48 c7 c6 a0 00 ec 8a e8 f4 a1 c7 f6 0f 0b eb bf e8 ab fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00
RSP: 0018:ffffc90000007bf0 EFLAGS: 00000046
RAX: ffffffff81517ec5 RBX: 0000000000000001 RCX: ffff888056dbd940
RDX: 0000000080010002 RSI: 00000000ffffffff RDI: ffffffff8ce0a058
RBP: ffff888056dbc1b8 R08: ffffffff815b3f07 R09: fffffbfff2093845
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000000f8c R14: 0000000000000001 R15: 0000000000000001
FS:  00007f77ff15f6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffff7000000 CR3: 00000000755c8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 pid_task+0x70/0x140 kernel/pid.c:401
 send_sigqueue+0x1c5/0x720 kernel/signal.c:1977
 posix_timer_event kernel/time/posix-timers.c:354 [inline]
 posix_timer_fn+0x186/0x390 kernel/time/posix-timers.c:380
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: c1 bc f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 fe 5b d5 f6 48 89 df e8 66 99 d6 f6 e8 31 24 fc f6 fb bf 01 00 00 00 <e8> 56 28 c9 f6 65 8b 05 c7 43 6d 75 85 c0 74 02 5b c3 e8 f4 68 6b
RSP: 0018:ffffc9000327fb30 EFLAGS: 00000286
RAX: 9722c88853910600 RBX: ffff888027608940 RCX: ffffffff91c94103
RDX: dffffc0000000000 RSI: ffffffff8aec01c0 RDI: 0000000000000001
RBP: ffffc9000327fc70 R08: dffffc0000000000 R09: ffffed1004ec1129
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11004ec11bb
R13: 000000001c000004 R14: 0000000000000021 R15: ffff888027608dd8
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x154b/0x17d0 kernel/signal.c:2865
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f77fe47cee7
Code: 14 25 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
RSP: 002b:00007f77ff15f0c8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f77fe5abf80 RCX: 00007f77fe47cee9
RDX: 0000000000000000 RSI: 0000800000000006 RDI: 0000000020001300
RBP: 00007f77fe4c949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f77fe5abf80 R15: 00007ffe681db8c8
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/17 20:42 linux-6.1.y 4078fa637fcd a12e99e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in __lru_add_drain_all
* Struck through repros no longer work on HEAD.