INFO: task syz-executor.1:20181 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29168 pid:20181 ppid: 29316 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: 0033:0x7f8e02afd739 RSP: 002b:00007f8e00074188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f8e02c01f80 RCX: 00007f8e02afd739 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007f8e02b57cc4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f8e02c01f80 R13: 00007ffe5b8b15df R14: 00007f8e00074300 R15: 0000000000022000 INFO: task syz-executor.1:20199 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29592 pid:20199 ppid: 29316 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: 0033:0x7f8e02afd739 RSP: 002b:00007f8e00032188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f8e02c020f0 RCX: 00007f8e02afd739 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007f8e02b57cc4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f8e02c020f0 R13: 00007ffe5b8b15df R14: 00007f8e00032300 R15: 0000000000022000 INFO: task syz-executor.4:20183 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29168 pid:20183 ppid: 6660 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: 0033:0x7f9cd83ff739 RSP: 002b:00007f9cd5976188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f9cd8503f80 RCX: 00007f9cd83ff739 RDX: bfffffffffffffff RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f9cd8459cc4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f9cd8503f80 R13: 00007ffee39a6e2f R14: 00007f9cd5976300 R15: 0000000000022000 INFO: task syz-executor.4:20188 blocked for more than 144 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28040 pid:20188 ppid: 6660 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: 0033:0x7f9cd83ff739 RSP: 002b:00007f9cd5955188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f9cd8504038 RCX: 00007f9cd83ff739 RDX: bfffffffffffffff RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f9cd8459cc4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f9cd8504038 R13: 00007ffee39a6e2f R14: 00007f9cd5955300 R15: 0000000000022000 INFO: task syz-executor.0:20176 blocked for more than 144 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27664 pid:20176 ppid: 8450 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:10944 __tun_detach+0x48d/0x13d0 drivers/net/tun.c:654 tun_detach drivers/net/tun.c:687 [inline] tun_chr_close+0xc4/0x180 drivers/net/tun.c:3397 __fput+0x288/0x9f0 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ff6f714654b RSP: 002b:00007ffe2bdfec70 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000008 RCX: 00007ff6f714654b RDX: ffffffffffffffbc RSI: ffffffff814f06af RDI: 0000000000000007 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2bd27878 R10: 0000000000001b91 R11: 0000000000000293 R12: 00007ff6f7298b00 R13: 00007ff6f7298b00 R14: 00007ff6f7297f80 R15: 00000000002b8a74 INFO: task syz-executor.0:20179 blocked for more than 144 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29168 pid:20179 ppid: 8450 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: 0033:0x7ff6f7193739 RSP: 002b:00007ff6f470a188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007ff6f7297f80 RCX: 00007ff6f7193739 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007ff6f71edcc4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007ff6f7297f80 R13: 00007ffe2bdfec0f R14: 00007ff6f470a300 R15: 0000000000022000 INFO: task syz-executor.0:20185 blocked for more than 145 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27016 pid:20185 ppid: 8450 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: 0033:0x7ff6f7193739 RSP: 002b:00007ff6f46e9188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007ff6f7298038 RCX: 00007ff6f7193739 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007ff6f71edcc4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007ff6f7298038 R13: 00007ffe2bdfec0f R14: 00007ff6f46e9300 R15: 0000000000022000 INFO: task syz-executor.2:20180 blocked for more than 145 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:29168 pid:20180 ppid: 8454 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: 0033:0x7f1d61068739 RSP: 002b:00007f1d5e5df188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f1d6116cf80 RCX: 00007f1d61068739 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f1d610c2cc4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f1d6116cf80 R13: 00007ffde309168f R14: 00007f1d5e5df300 R15: 0000000000022000 INFO: task syz-executor.2:20187 blocked for more than 145 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27928 pid:20187 ppid: 8454 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: 0033:0x7f1d61068739 RSP: 002b:00007f1d5e5be188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f1d6116d038 RCX: 00007f1d61068739 RDX: ffffffbfffffffff RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f1d610c2cc4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f1d6116d038 R13: 00007ffde309168f R14: 00007f1d5e5be300 R15: 0000000000022000 INFO: task syz-executor.2:20195 blocked for more than 146 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:25496 pid:20195 ppid: 8454 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: 0033:0x7f1d61068739 RSP: 002b:00007f1d5e59d188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f1d6116d0f0 RCX: 00007f1d61068739 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f1d610c2cc4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f1d6116d0f0 R13: 00007ffde309168f R14: 00007f1d5e59d300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1648: #0: ffffffff8b97fc60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by khugepaged/1666: #0: ffffffff8ba62d48 (lock#6){+.+.}-{3:3}, at: __lru_add_drain_all+0x65/0x760 mm/swap.c:769 3 locks held by kworker/0:3/4843: #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268 #1: ffffc90000eefdb0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272 #2: ffffffff8d0e65e8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x83/0xe10 net/wireless/reg.c:2423 1 lock held by in:imklog/8138: #0: ffff888076ac1270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 4 locks held by kworker/u4:4/1625: #0: ffff88801ecc4138 ((wq_completion)phy81){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88801ecc4138 ((wq_completion)phy81){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff88801ecc4138 ((wq_completion)phy81){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff88801ecc4138 ((wq_completion)phy81){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff88801ecc4138 ((wq_completion)phy81){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff88801ecc4138 ((wq_completion)phy81){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268 #1: ffffc90001ecfdb0 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272 #2: ffff888016c84d80 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1014 [inline] #2: ffff888016c84d80 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x93/0xe80 net/mac80211/ibss.c:1676 #3: ffff888085ed1770 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_sta_expire net/mac80211/ibss.c:1255 [inline] #3: ffff888085ed1770 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_sta_merge_ibss net/mac80211/ibss.c:1298 [inline] #3: ffff888085ed1770 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x481/0xe80 net/mac80211/ibss.c:1704 2 locks held by kworker/1:1/11454: 1 lock held by syz-executor.1/20181: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.1/20199: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.4/20183: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.4/20188: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 2 locks held by syz-executor.0/20176: #0: ffffffff8d0e65e8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:684 [inline] #0: ffffffff8d0e65e8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3a/0x180 drivers/net/tun.c:3397 #1: ffffffff8b988fe8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #1: ffffffff8b988fe8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d5/0x620 kernel/rcu/tree_exp.h:837 2 locks held by syz-executor.0/20179: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 #1: ffffffff8b988fe8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8b988fe8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fc/0x620 kernel/rcu/tree_exp.h:837 1 lock held by syz-executor.0/20185: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.2/20180: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.2/20187: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.2/20195: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.2/20202: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.3/20184: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.3/20200: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.5/20186: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x31ed/0x3b10 kernel/events/core.c:11619 1 lock held by syz-executor.5/20191: #0: ffffffff8ba4b4a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11386 [inline] #0: ffffffff8ba4b4a8 (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: 1648 Comm: khungtaskd Not tainted 5.14.0-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:105 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: 4847 Comm: systemd-journal Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kmalloc_slab+0x7/0xe0 mm/slab_common.c:733 Code: e9 ee 73 15 00 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 3d 41 48 7e 0e 02 0f 97 c0 c3 0f 1f 44 00 00 48 81 ff c0 00 00 00 <41> 54 55 89 f5 53 77 53 48 85 ff b8 10 00 00 00 74 44 83 ef 01 c1 RSP: 0018:ffffc9000ab3fdc0 EFLAGS: 00000287 RAX: 0000000000000000 RBX: 0000000000000010 RCX: 0000000000000000 RDX: ffff88807bf78000 RSI: 0000000000400dc0 RDI: 0000000000000010 RBP: ffff88801efdd700 R08: 0000000000000000 R09: 0000000000000100 R10: ffffffff839e9d1b R11: 0000000000000000 R12: 0000000000400dc0 R13: ffff88804252d700 R14: 0000000000000010 R15: ffff88801efdd700 FS: 00007fb62f0ba8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb62bf22000 CR3: 000000001e5bc000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __kmalloc+0x36/0x330 mm/slub.c:4106 kmalloc include/linux/slab.h:596 [inline] kzalloc include/linux/slab.h:721 [inline] lsm_cred_alloc security/security.c:537 [inline] security_prepare_creds+0x10e/0x190 security/security.c:1691 prepare_creds+0x56e/0x7b0 kernel/cred.c:293 access_override_creds fs/open.c:351 [inline] do_faccessat+0x3f4/0x850 fs/open.c:415 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: 0033:0x7fb62e3759c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffe9a931c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffe9a934ca0 RCX: 00007fb62e3759c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055facadaa9a3 RBP: 00007ffe9a931dc0 R08: 000055facada03e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 000055facbd7c8a0 R15: 00007ffe9a9322b0 ---------------- Code disassembly (best guess): 0: e9 ee 73 15 00 jmpq 0x1573f3 5: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) c: 00 00 00 00 10: 0f 1f 00 nopl (%rax) 13: 83 3d 41 48 7e 0e 02 cmpl $0x2,0xe7e4841(%rip) # 0xe7e485b 1a: 0f 97 c0 seta %al 1d: c3 retq 1e: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 23: 48 81 ff c0 00 00 00 cmp $0xc0,%rdi * 2a: 41 54 push %r12 <-- trapping instruction 2c: 55 push %rbp 2d: 89 f5 mov %esi,%ebp 2f: 53 push %rbx 30: 77 53 ja 0x85 32: 48 85 ff test %rdi,%rdi 35: b8 10 00 00 00 mov $0x10,%eax 3a: 74 44 je 0x80 3c: 83 ef 01 sub $0x1,%edi 3f: c1 .byte 0xc1