Hello, When using Syzkaller to fuzz the latest Linux kernel, the following crash was triggered. HEAD commit: a7904a538933 Linux 5.16-rc6 git tree: upstream console output: https://paste.ubuntu.com/p/rnV5TYkykk/plain/ kernel config: https://paste.ubuntu.com/p/FDDNHDxtwz/plain/ Sorry, I don't have a reproducer for this crash, hope the symbolized report can help. If you fix this issue, please add the following tag to the commit: Reported-by: Yiru Xu <xyru1999@xxxxxxxxx> INFO: task kworker/2:12:10249 blocked for more than 143 seconds. Not tainted 5.16.0-rc6 #9 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/2:12 state:D stack:26368 pid:10249 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: <TASK> context_switch kernel/sched/core.c:4972 [inline] __schedule+0xcd9/0x2530 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385 __mutex_lock_common kernel/locking/mutex.c:680 [inline] __mutex_lock+0xc48/0x1610 kernel/locking/mutex.c:740 hub_port_connect drivers/usb/core/hub.c:5250 [inline] hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] port_event drivers/usb/core/hub.c:5643 [inline] hub_event+0x1b4c/0x4090 drivers/usb/core/hub.c:5725 process_one_work+0x9df/0x16d0 kernel/workqueue.c:2298 worker_thread+0x90/0xed0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> Showing all locks held in the system: 1 lock held by khungtaskd/39: #0: ffffffff8bb80e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 1 lock held by in:imklog/6757: #0: ffff88801812a670 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:1034 3 locks held by syz-executor.6/6796: 3 locks held by syz-executor.3/6797: #0: ffff888063f39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x1e/0x30 kernel/sched/core.c:478 #1: ffffffff8bb80e20 (rcu_read_lock){....}-{1:2}, at: perf_iterate_sb+0x0/0x9c0 kernel/events/core.c:7750 #2: ffffffff8bb80e20 (rcu_read_lock){....}-{1:2}, at: folio_memcg_lock+0x0/0x580 include/linux/cgroup.h:574 2 locks held by kworker/u8:5/11482: 5 locks held by kworker/1:67/21640: #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8c3/0x16d0 kernel/workqueue.c:2269 #1: ffffc90003fcfdc8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8f7/0x16d0 kernel/workqueue.c:2273 #2: ffff88801bccd220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff88801bccd220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4090 drivers/usb/core/hub.c:5671 #3: ffff88801bd185c0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3086 [inline] #3: ffff88801bd185c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5249 [inline] #3: ffff88801bd185c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] #3: ffff88801bd185c0 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] #3: ffff88801bd185c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1b23/0x4090 drivers/usb/core/hub.c:5725 #4: ffff88801a7cce68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5250 [inline] #4: ffff88801a7cce68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] #4: ffff88801a7cce68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] #4: ffff88801a7cce68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x1b4c/0x4090 drivers/usb/core/hub.c:5725 5 locks held by kworker/2:12/10249: #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8c3/0x16d0 kernel/workqueue.c:2269 #1: ffffc900141afdc8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8f7/0x16d0 kernel/workqueue.c:2273 #2: ffff88801be3f220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff88801be3f220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4090 drivers/usb/core/hub.c:5671 #3: ffff8881088da5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3086 [inline] #3: ffff8881088da5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5249 [inline] #3: ffff8881088da5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] #3: ffff8881088da5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] #3: ffff8881088da5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1b23/0x4090 drivers/usb/core/hub.c:5725 #4: ffff888108882a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5250 [inline] #4: ffff888108882a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] #4: ffff888108882a68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] #4: ffff888108882a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x1b4c/0x4090 drivers/usb/core/hub.c:5725 5 locks held by kworker/3:85/14401: #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888102b41d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8c3/0x16d0 kernel/workqueue.c:2269 #1: ffffc9000611fdc8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8f7/0x16d0 kernel/workqueue.c:2273 #2: ffff8881087e6220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff8881087e6220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4090 drivers/usb/core/hub.c:5671 #3: ffff88801bdb15c0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3086 [inline] #3: ffff88801bdb15c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5249 [inline] #3: ffff88801bdb15c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] #3: ffff88801bdb15c0 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] #3: ffff88801bdb15c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1b23/0x4090 drivers/usb/core/hub.c:5725 #4: ffff888108882a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5250 [inline] #4: ffff888108882a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] #4: ffff888108882a68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] #4: ffff888108882a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x1b4c/0x4090 drivers/usb/core/hub.c:5725 3 locks held by kworker/3:97/14413: #0: ffff8880116b1538 ((wq_completion)pm){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880116b1538 ((wq_completion)pm){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8880116b1538 ((wq_completion)pm){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff8880116b1538 ((wq_completion)pm){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff8880116b1538 ((wq_completion)pm){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff8880116b1538 ((wq_completion)pm){+.+.}-{0:0}, at: process_one_work+0x8c3/0x16d0 kernel/workqueue.c:2269 #1: ffffc9000621fdc8 ((work_completion)(&hcd->wakeup_work)){+.+.}-{0:0}, at: process_one_work+0x8f7/0x16d0 kernel/workqueue.c:2273 #2: ffff8881085b8220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff8881085b8220 (&dev->mutex){....}-{3:3}, at: usb_remote_wakeup+0x1f/0xe0 drivers/usb/core/hub.c:3720 2 locks held by syz-executor.0/5478: 3 locks held by syz-executor.2/5490: 5 locks held by syz-executor.6/5499: ============================================= NMI backtrace for cpu 3 CPU: 3 PID: 39 Comm: khungtaskd Not tainted 5.16.0-rc6 #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Call Trace: <TASK> __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:111 nmi_trigger_cpumask_backtrace+0x1a1/0x1e0 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+0xcc8/0x1010 kernel/hung_task.c:295 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> Sending NMI from CPU 3 to CPUs 0-2: NMI backtrace for cpu 1 CPU: 1 PID: 5478 Comm: syz-executor.0 Not tainted 5.16.0-rc6 #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:hlock_class kernel/locking/lockdep.c:194 [inline] RIP: 0010:mark_lock.part.0+0xc4/0x27c0 kernel/locking/lockdep.c:4583 Code: 00 41 bd 01 00 00 00 44 89 f1 41 d3 e5 4d 63 ed 4d 8d 7c 24 20 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e 8c 09 00 00 41 0f b7 54 24 20 66 81 e2 ff RSP: 0018:ffffc900007e05c0 EFLAGS: 00000016 RAX: 0000000000000000 RBX: 1ffff920000fc0c0 RCX: ffffffff815c1d52 RDX: 1ffff11025cd7c24 RSI: ffff88812e6be100 RDI: ffff88812e6be122 RBP: ffffc900007e0730 R08: 1ffff11025cd7c1f R09: fffffbfff1fee129 R10: ffffffff8ff70947 R11: fffffbfff1fee128 R12: ffff88812e6be100 R13: 0000000000000200 R14: 0000000000000009 R15: ffff88812e6be120 FS: 00007fc709689700(0000) GS:ffff888135c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056396e881f17 CR3: 000000011b375000 CR4: 0000000000350ee0 Call Trace: <IRQ> mark_lock kernel/locking/lockdep.c:4569 [inline] mark_usage kernel/locking/lockdep.c:4526 [inline] __lock_acquire+0x8e1/0x57e0 kernel/locking/lockdep.c:4981 lock_acquire kernel/locking/lockdep.c:5637 [inline] lock_acquire+0x1ab/0x520 kernel/locking/lockdep.c:5602 rcu_lock_acquire include/linux/rcupdate.h:268 [inline] rcu_read_lock include/linux/rcupdate.h:688 [inline] __perf_output_begin kernel/events/ring_buffer.c:163 [inline] perf_output_begin_forward+0xb0/0xa30 kernel/events/ring_buffer.c:268 __perf_event_output kernel/events/core.c:7489 [inline] perf_event_output_forward+0xf2/0x280 kernel/events/core.c:7507 __perf_event_overflow+0x13c/0x3d0 kernel/events/core.c:9207 perf_swevent_hrtimer+0x37c/0x3f0 kernel/events/core.c:10600 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x5f0/0xdf0 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6668 Code: 55 53 65 48 8b 1c 25 40 70 02 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 62 44 0c f8 e8 6d 6c 39 f8 fb bf 01 00 00 00 <e8> 22 cf ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 00 2a 0c RSP: 0018:ffffc900062ef2a8 EFLAGS: 00000206 RAX: 0000000000000dbb RBX: ffff88812e6bd640 RCX: 1ffffffff1ff599e RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffed1025cd7ac8 R08: 0000000000000001 R09: fffffbfff1fee13c R10: 0000000000000001 R11: fffffbfff1fee13b R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 irqentry_exit+0x31/0x80 kernel/entry/common.c:425 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:380 [inline] RIP: 0010:__rcu_read_unlock+0x11/0x570 kernel/rcu/tree_plugin.h:419 Code: e8 b4 34 5a 00 e9 a6 f9 ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 56 41 55 41 54 55 65 48 8b 2c 25 40 70 02 00 53 <48> 8d bd fc 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffffc900062ef370 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88812e6bd640 RDX: 0000000000000000 RSI: ffff88812e6bd640 RDI: 0000000000000002 RBP: ffff88812e6bd640 R08: ffffffff818411dc R09: 0000000000000000 R10: 0000000000000001 R11: fffffbfff1fee128 R12: ffffc900062ef400 R13: 0000000000000000 R14: ffff88812e6bd640 R15: ffff88804c446280 rcu_read_unlock include/linux/rcupdate.h:720 [inline] is_bpf_text_address+0x81/0x170 kernel/bpf/core.c:717 kernel_text_address kernel/extable.c:124 [inline] kernel_text_address+0x39/0x80 kernel/extable.c:93 __kernel_text_address+0x9/0x30 kernel/extable.c:78 unwind_get_return_address arch/x86/kernel/unwind_orc.c:318 [inline] unwind_get_return_address+0x5a/0xa0 arch/x86/kernel/unwind_orc.c:313 arch_stack_walk+0x93/0xe0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0x100/0x140 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook mm/slub.c:1749 [inline] slab_free mm/slub.c:3513 [inline] kfree+0x107/0x4c0 mm/slub.c:4561 tomoyo_check_open_permission+0x169/0x370 security/tomoyo/file.c:786 tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline] tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:306 security_file_open+0x52/0x650 security/security.c:1635 do_dentry_open+0x353/0x1250 fs/open.c:809 do_open fs/namei.c:3426 [inline] path_openat+0x1c3c/0x26c0 fs/namei.c:3559 do_filp_open+0x1c1/0x290 fs/namei.c:3586 do_sys_openat2+0x61b/0x9a0 fs/open.c:1212 do_sys_open+0xc3/0x140 fs/open.c:1228 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: 0033:0x7fc70ad1789d Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc709688c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fc70ae36f60 RCX: 00007fc70ad1789d RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000400 RBP: 00007fc70ad8400d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9fe1f68f R14: 00007fc70ae36f60 R15: 00007fc709688dc0 </TASK> NMI backtrace for cpu 0 CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 5.16.0-rc6 #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_pc+0x1a/0x40 kernel/kcov.c:200 Code: 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 65 48 8b 0c 25 40 70 02 00 bf 02 00 00 00 48 89 ce 4c 8b 04 24 e8 76 ff ff ff <84> c0 74 20 48 8b 91 48 15 00 00 8b 89 44 15 00 00 48 8b 02 48 83 RSP: 0018:ffffc900007279f8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88801161b980 RDX: 0000000000000000 RSI: ffff88801161b980 RDI: 0000000000000002 RBP: ffffc90000727b80 R08: ffffffff8727162b R09: 0000000000000000 R10: 0000000000000001 R11: fffffbfff1b20a2a R12: ffff888044bb06c2 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888044bb0640 FS: 0000000000000000(0000) GS:ffff888063e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6256488000 CR3: 000000010755d000 CR4: 0000000000350ef0 Call Trace: <TASK> __netif_receive_skb_core+0x11bb/0x3a60 net/core/dev.c:5375 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5463 __netif_receive_skb+0x24/0x1c0 net/core/dev.c:5579 process_backlog+0x223/0x770 net/core/dev.c:6455 __napi_poll+0xb3/0x630 net/core/dev.c:7023 napi_poll net/core/dev.c:7090 [inline] net_rx_action+0x823/0xbc0 net/core/dev.c:7177 __do_softirq+0x1d7/0x93b kernel/softirq.c:558 run_ksoftirqd kernel/softirq.c:921 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> NMI backtrace for cpu 2 CPU: 2 PID: 5461 Comm: systemd-udevd Not tainted 5.16.0-rc6 #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:hlock_class kernel/locking/lockdep.c:194 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4701 [inline] RIP: 0010:__lock_acquire+0x43b/0x57e0 kernel/locking/lockdep.c:4977 Code: fa 48 c1 ea 03 0f b6 04 02 84 c0 74 06 0f 8e f0 11 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 30 45 0f b6 a7 b8 00 00 00 <48> c1 e9 03 0f b6 04 01 84 c0 74 08 3c 03 0f 8e b6 11 00 00 44 0f RSP: 0018:ffffc900036df450 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 0000000000000007 RCX: ffff88812cf02728 RDX: 1ffffffff1fee26b RSI: 0000000000000008 RDI: ffffffff8ff71358 RBP: ffff88812cf02708 R08: 1ffff110259e04e0 R09: fffffbfff1fee129 R10: ffffffff8ff70947 R11: fffffbfff1fee128 R12: 0000000000000002 R13: ffff88812cf01cc0 R14: ffffffff8bb80e20 R15: ffffffff8ff712a0 FS: 00007f62c61298c0(0000) GS:ffff888063f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcb6541ff8 CR3: 000000011c0da000 CR4: 0000000000350ee0 Call Trace: <TASK> lock_acquire kernel/locking/lockdep.c:5637 [inline] lock_acquire+0x1ab/0x520 kernel/locking/lockdep.c:5602 rcu_lock_acquire include/linux/rcupdate.h:268 [inline] rcu_read_lock include/linux/rcupdate.h:688 [inline] is_bpf_text_address+0x36/0x170 kernel/bpf/core.c:715 kernel_text_address kernel/extable.c:124 [inline] kernel_text_address+0x39/0x80 kernel/extable.c:93 __kernel_text_address+0x9/0x30 kernel/extable.c:78 unwind_get_return_address arch/x86/kernel/unwind_orc.c:318 [inline] unwind_get_return_address+0x5a/0xa0 arch/x86/kernel/unwind_orc.c:313 arch_stack_walk+0x93/0xe0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] ____kasan_kmalloc mm/kasan/common.c:472 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:269 [inline] __kmalloc+0x1d2/0x3d0 mm/slub.c:4423 kmalloc include/linux/slab.h:595 [inline] tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x219/0x420 security/tomoyo/file.c:822 security_inode_getattr+0xcf/0x140 security/security.c:1334 vfs_getattr+0x22/0x60 fs/stat.c:157 vfs_fstat+0x49/0x90 fs/stat.c:182 __do_sys_newfstat+0x81/0x100 fs/stat.c:422 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: 0033:0x7f62c4f9c2e2 Code: 48 8b 05 b9 db 2b 00 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 83 ff 01 77 33 48 63 fe b8 05 00 00 00 48 89 d6 0f 05 <48> 3d 00 f0 ff ff 77 06 f3 c3 0f 1f 40 00 48 8b 15 81 db 2b 00 f7 RSP: 002b:00007ffc339204b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000005 RAX: ffffffffffffffda RBX: 00007f62c5257440 RCX: 00007f62c4f9c2e2 RDX: 00007ffc339204c0 RSI: 00007ffc339204c0 RDI: 000000000000000f RBP: 000056396e682d30 R08: 0000000000000b40 R09: 000056396e67ee40 R10: 000056396e682d30 R11: 0000000000000246 R12: 0000000000000001 R13: 000000000000003e R14: 000056396e67ee40 R15: 00007ffc33920760 </TASK> ---------------- Code disassembly (best guess): 0: 00 41 bd add %al,-0x43(%rcx) 3: 01 00 add %eax,(%rax) 5: 00 00 add %al,(%rax) 7: 44 89 f1 mov %r14d,%ecx a: 41 d3 e5 shl %cl,%r13d d: 4d 63 ed movslq %r13d,%r13 10: 4d 8d 7c 24 20 lea 0x20(%r12),%r15 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 4c 89 fa mov %r15,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax * 2a: 84 c0 test %al,%al <-- trapping instruction 2c: 74 08 je 0x36 2e: 3c 03 cmp $0x3,%al 30: 0f 8e 8c 09 00 00 jle 0x9c2 36: 41 0f b7 54 24 20 movzwl 0x20(%r12),%edx 3c: 66 data16 3d: 81 .byte 0x81 3e: e2 ff loop 0x3f Best Regards, Yiru
