INFO: task khugepaged:33 blocked for more than 143 seconds. Not tainted 5.15.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:khugepaged state:D stack:23720 pid: 33 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 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+0x176/0x280 kernel/sched/completion.c:138 __flush_work+0x56e/0xb10 kernel/workqueue.c:3083 __lru_add_drain_all+0x3fd/0x760 mm/swap.c:820 khugepaged_do_scan mm/khugepaged.c:2214 [inline] khugepaged+0x10f/0x55a0 mm/khugepaged.c:2275 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task kworker/u4:2:148 blocked for more than 143 seconds. Not tainted 5.15.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:2 state:D stack:24664 pid: 148 ppid: 2 flags:0x00004000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 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+0x176/0x280 kernel/sched/completion.c:138 __synchronize_srcu+0x1f4/0x290 kernel/rcu/srcutree.c:930 fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:164 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task kworker/u4:11:10336 blocked for more than 144 seconds. Not tainted 5.15.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:11 state:D stack:24296 pid:10336 ppid: 2 flags:0x00004000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 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+0x176/0x280 kernel/sched/completion.c:138 __synchronize_srcu+0x1f4/0x290 kernel/rcu/srcutree.c:930 fsnotify_mark_destroy_workfn+0xfd/0x340 fs/notify/mark.c:861 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task syz-executor.5:30007 blocked for more than 144 seconds. Not tainted 5.15.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27448 pid:30007 ppid: 6885 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 account_event kernel/events/core.c:11386 [inline] perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 perf_event_alloc kernel/events/core.c:11971 [inline] __do_sys_perf_event_open+0x4ae/0x3130 kernel/events/core.c:12069 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+0x44/0xae RIP: 0033:0x7f191366c8d9 RSP: 002b:00007f1910be3188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f1913770f60 RCX: 00007f191366c8d9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f19136c6cb4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffda10d7bf R14: 00007f1910be3300 R15: 0000000000022000 INFO: task syz-executor.5:30023 blocked for more than 145 seconds. Not tainted 5.15.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27448 pid:30023 ppid: 6885 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 account_event kernel/events/core.c:11386 [inline] perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 perf_event_alloc kernel/events/core.c:11971 [inline] __do_sys_perf_event_open+0x4ae/0x3130 kernel/events/core.c:12069 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+0x44/0xae RIP: 0033:0x7f191366c8d9 RSP: 002b:00007f1910ba1188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f19137710e0 RCX: 00007f191366c8d9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f19136c6cb4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffda10d7bf R14: 00007f1910ba1300 R15: 0000000000022000 INFO: task syz-executor.1:30015 blocked for more than 145 seconds. Not tainted 5.15.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29168 pid:30015 ppid: 24777 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 account_event kernel/events/core.c:11386 [inline] perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 perf_event_alloc kernel/events/core.c:11971 [inline] __do_sys_perf_event_open+0x4ae/0x3130 kernel/events/core.c:12069 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+0x44/0xae RIP: 0033:0x7f65e11168d9 RSP: 002b:00007f65de68d188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f65e121af60 RCX: 00007f65e11168d9 RDX: bfffffffffffffff RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f65e1170cb4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffec257065f R14: 00007f65de68d300 R15: 0000000000022000 INFO: task syz-executor.1:30019 blocked for more than 145 seconds. Not tainted 5.15.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27592 pid:30019 ppid: 24777 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 account_event kernel/events/core.c:11386 [inline] perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 perf_event_alloc kernel/events/core.c:11971 [inline] __do_sys_perf_event_open+0x4ae/0x3130 kernel/events/core.c:12069 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+0x44/0xae RIP: 0033:0x7f65e11168d9 RSP: 002b:00007f65de66c188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f65e121b020 RCX: 00007f65e11168d9 RDX: bfffffffffffffff RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f65e1170cb4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffec257065f R14: 00007f65de66c300 R15: 0000000000022000 INFO: task syz-executor.4:30004 blocked for more than 146 seconds. Not tainted 5.15.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29032 pid:30004 ppid: 24755 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 synchronize_rcu_expedited+0x473/0x620 kernel/rcu/tree_exp.h:853 synchronize_rcu+0x132/0x190 kernel/rcu/tree.c:3746 account_event kernel/events/core.c:11394 [inline] perf_event_alloc.part.0+0x3362/0x3b10 kernel/events/core.c:11619 perf_event_alloc kernel/events/core.c:11971 [inline] __do_sys_perf_event_open+0x4ae/0x3130 kernel/events/core.c:12069 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+0x44/0xae RIP: 0033:0x7fea42b6a8d9 RSP: 002b:00007fea400e1188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fea42c6ef60 RCX: 00007fea42b6a8d9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000380 RBP: 00007fea42bc4cb4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe31eb1cbf R14: 00007fea400e1300 R15: 0000000000022000 INFO: task syz-executor.4:30009 blocked for more than 146 seconds. Not tainted 5.15.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29616 pid:30009 ppid: 24755 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 account_event kernel/events/core.c:11386 [inline] perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 perf_event_alloc kernel/events/core.c:11971 [inline] __do_sys_perf_event_open+0x4ae/0x3130 kernel/events/core.c:12069 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+0x44/0xae RIP: 0033:0x7fea42b6a8d9 RSP: 002b:00007fea400c0188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fea42c6f020 RCX: 00007fea42b6a8d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000500 RBP: 00007fea42bc4cb4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe31eb1cbf R14: 00007fea400c0300 R15: 0000000000022000 INFO: task syz-executor.4:30013 blocked for more than 147 seconds. Not tainted 5.15.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28112 pid:30013 ppid: 24755 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] synchronize_rcu_expedited+0x2d5/0x620 kernel/rcu/tree_exp.h:837 synchronize_net+0x3c/0x60 net/core/dev.c:10948 dev_deactivate_many+0x495/0xc50 net/sched/sch_generic.c:1291 __dev_close_many+0x135/0x2f0 net/core/dev.c:1555 __dev_close net/core/dev.c:1580 [inline] __dev_change_flags+0x2ca/0x750 net/core/dev.c:8759 dev_change_flags+0x93/0x170 net/core/dev.c:8832 devinet_ioctl+0x15d1/0x1ca0 net/ipv4/devinet.c:1142 inet_ioctl+0x1e6/0x320 net/ipv4/af_inet.c:971 sock_do_ioctl+0xcc/0x230 net/socket.c:1118 sock_ioctl+0x2f1/0x640 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7fea42b6a8d9 RSP: 002b:00007fea4009f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fea42c6f0e0 RCX: 00007fea42b6a8d9 RDX: 0000000020000000 RSI: 0000000000008914 RDI: 0000000000000005 RBP: 00007fea42bc4cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe31eb1cbf R14: 00007fea4009f300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b97fea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by khugepaged/33: #0: ffffffff8ba62f88 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x65/0x760 mm/swap.c:769 2 locks held by kworker/u4:2/148: #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268 #1: ffffc9000171fdb0 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272 1 lock held by in:imklog/6400: #0: ffff888073ce59f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 3 locks held by kworker/1:7/8488: 3 locks held by kworker/0:7/8571: 2 locks held by kworker/u4:11/10336: #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268 #1: ffffc90004a4fdb0 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272 1 lock held by syz-executor.5/30007: #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.5/30023: #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.1/30015: #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.1/30019: #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 2 locks held by syz-executor.4/30004: #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 #1: ffffffff8b989228 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8b989228 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fc/0x620 kernel/rcu/tree_exp.h:837 1 lock held by syz-executor.4/30009: #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 2 locks held by syz-executor.4/30013: #0: ffffffff8d0e3aa8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x1b3/0x1ca0 net/ipv4/devinet.c:1066 #1: ffffffff8b989228 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #1: ffffffff8b989228 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d5/0x620 kernel/rcu/tree_exp.h:837 2 locks held by syz-executor.4/30016: #0: ffffffff8d176e50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802 #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 1 lock held by syz-executor.4/30021: #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.4/30030: #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.2/30006: #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 3 locks held by syz-executor.0/30008: #0: ffffffff8d176e50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802 #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 #2: ffffffff8d0e3aa8 (rtnl_mutex){+.+.}-{3:3}, at: tipc_nl_bearer_set+0x13/0x30 net/tipc/bearer.c:1159 2 locks held by syz-executor.0/30014: #0: ffffffff8d176e50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802 #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 2 locks held by syz-executor.0/30017: #0: ffffffff8d176e50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802 #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 2 locks held by syz-executor.0/30022: #0: ffffffff8d176e50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802 #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 2 locks held by syz-executor.0/30026: #0: ffffffff8d176e50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802 #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 2 locks held by syz-executor.0/30029: #0: ffffffff8d176e50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802 #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8d176f08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 1 lock held by syz-executor.3/30011: #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.3/30034: #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b6e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10 Comm: kworker/u4:1 Not tainted 5.15.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_tt_purge RIP: 0010:check_preemption_disabled+0x2c/0x140 lib/smp_processor_id.c:16 Code: 41 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 6d 7d cc 76 65 8b 1d fe d7 cc 76 81 e3 ff ff ff 7f 31 ff 89 de <0f> 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b 5d 41 5c 41 RSP: 0018:ffffc90000cf7c60 EFLAGS: 00000046 RAX: 0000000080000001 RBX: 0000000000000001 RCX: 1ffffffff204931c RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffffff89e42b20 R08: 0000000000000000 R09: ffff8880277c9243 R10: ffffffff817c32bd R11: 0000000000000000 R12: 0000000000000001 R13: ffffffff898a94c0 R14: ffff8881400d8300 R15: 0000000000000249 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffa1004c000 CR3: 000000000b68e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __local_bh_enable_ip+0xe2/0x120 kernel/softirq.c:378 spin_unlock_bh include/linux/spinlock.h:408 [inline] batadv_tt_global_purge net/batman-adv/translation-table.c:2300 [inline] batadv_tt_purge+0x3a3/0xaf0 net/batman-adv/translation-table.c:3562 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 41 55 push %r13 2: 49 89 f5 mov %rsi,%r13 5: 41 54 push %r12 7: 55 push %rbp 8: 48 89 fd mov %rdi,%rbp b: 53 push %rbx c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 11: 65 44 8b 25 6d 7d cc mov %gs:0x76cc7d6d(%rip),%r12d # 0x76cc7d86 18: 76 19: 65 8b 1d fe d7 cc 76 mov %gs:0x76ccd7fe(%rip),%ebx # 0x76ccd81e 20: 81 e3 ff ff ff 7f and $0x7fffffff,%ebx 26: 31 ff xor %edi,%edi 28: 89 de mov %ebx,%esi * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: 85 db test %ebx,%ebx 31: 74 11 je 0x44 33: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 38: 44 89 e0 mov %r12d,%eax 3b: 5b pop %rbx 3c: 5d pop %rbp 3d: 41 5c pop %r12 3f: 41 rex.B