kasan: CONFIG_KASAN_INLINE enabled kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: -1861588088 Comm: R Not tainted 4.20.0+ #6 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rb_set_parent_color include/linux/rbtree_augmented.h:131 [inline] RIP: 0010:____rb_erase_color lib/rbtree.c:271 [inline] RIP: 0010:rb_erase+0x7b0/0x3550 lib/rbtree.c:462 Code: 89 a7 a0 fb ff ff 80 3c 1f 00 0f 85 25 23 00 00 48 c1 e9 03 48 89 c7 4d 89 66 10 48 c1 ef 03 c6 04 19 f8 4c 89 e1 48 83 c9 01 <80> 3c 1f 00 0f 85 54 23 00 00 48 89 08 4c 89 e1 48 c1 e9 03 80 3c RSP: 0018:ffff8880ae707698 EFLAGS: 00010082 RAX: 1c47e888753ca400 RBX: dffffc0000000000 RCX: ffff88807ccb78d9 RDX: 1ffff11015ce0edb RSI: ffffed1015ce0f07 RDI: 0388fd110ea79480 RBP: ffff8880ae707c00 R08: ffff88807ccb78e0 R09: ffff8880a9427470 R10: fffffbfff16d4c6d R11: ffffffff8b6a636b R12: ffff88807ccb78d8 R13: ffff8880ae725e00 R14: ffff8880a9427460 R15: ffff8880ae707bd8 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000068 CR3: 00000000a48e9000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: timerqueue_del+0x86/0x150 lib/timerqueue.c:87 __remove_hrtimer+0xa8/0x1c0 kernel/time/hrtimer.c:975 __run_hrtimer kernel/time/hrtimer.c:1371 [inline] __hrtimer_run_queues+0x311/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 Modules linked in: ====================================================== WARNING: possible circular locking dependency detected 4.20.0+ #6 Not tainted ------------------------------------------------------ syz-executor1/8509 is trying to acquire lock: 00000000dbbab0d5 ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: 00000000e947a71e (&obj_hash[i].lock){-.-.}, at: debug_object_deactivate lib/debugobjects.c:540 [inline] 00000000e947a71e (&obj_hash[i].lock){-.-.}, at: debug_object_deactivate+0x101/0x4b0 lib/debugobjects.c:529 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&obj_hash[i].lock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 __debug_object_init+0xf6/0x12d0 lib/debugobjects.c:383 debug_object_init+0x16/0x20 lib/debugobjects.c:431 debug_hrtimer_init kernel/time/hrtimer.c:401 [inline] debug_init kernel/time/hrtimer.c:449 [inline] hrtimer_init+0x97/0x480 kernel/time/hrtimer.c:1299 init_dl_task_timer+0x1b/0x50 kernel/sched/deadline.c:1057 __sched_fork+0x2bf/0x5b0 kernel/sched/core.c:2166 init_idle+0x75/0x670 kernel/sched/core.c:5374 sched_init+0xb10/0xbe8 kernel/sched/core.c:6063 start_kernel+0x445/0x8bd init/main.c:609 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #2 (&rq->lock){-.-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 rq_lock kernel/sched/sched.h:1149 [inline] task_fork_fair+0xb5/0x7a0 kernel/sched/fair.c:10058 sched_fork+0x437/0xb90 kernel/sched/core.c:2359 copy_process+0x1ff6/0x8730 kernel/fork.c:1893 _do_fork+0x1a9/0x1170 kernel/fork.c:2222 kernel_thread+0x34/0x40 kernel/fork.c:2281 rest_init+0x28/0x37b init/main.c:409 arch_call_rest_init+0xe/0x1b start_kernel+0x882/0x8bd init/main.c:741 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #1 (&p->pi_lock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 try_to_wake_up+0xb9/0x1480 kernel/sched/core.c:1965 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 __up.isra.0+0x1c0/0x2a0 kernel/locking/semaphore.c:262 up+0x13e/0x1c0 kernel/locking/semaphore.c:187 __up_console_sem+0xb7/0x1c0 kernel/printk/printk.c:236 console_unlock+0x778/0x11e0 kernel/printk/printk.c:2426 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1931 dev_vprintk_emit+0x25d/0x560 drivers/base/core.c:3029 dev_printk_emit+0xbb/0xf0 drivers/base/core.c:3040 __dev_printk+0xa9/0x110 drivers/base/core.c:3052 _dev_warn+0x10a/0x160 drivers/base/core.c:3096 _request_firmware+0xe6b/0x15c0 drivers/base/firmware_loader/main.c:590 request_firmware_work_func+0xf1/0x2f0 drivers/base/firmware_loader/main.c:783 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 -> #0 ((console_sem).lock){-.-.}: lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xa8/0x210 kernel/printk/printk.c:219 console_trylock+0x15/0xa0 kernel/printk/printk.c:2242 console_trylock_spinning kernel/printk/printk.c:1662 [inline] vprintk_emit+0x351/0x960 kernel/printk/printk.c:1930 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:1991 kasan_die_handler arch/x86/mm/kasan_init_64.c:252 [inline] kasan_die_handler.cold+0x11/0x23 arch/x86/mm/kasan_init_64.c:247 notifier_call_chain+0x179/0x380 kernel/notifier.c:93 __atomic_notifier_call_chain kernel/notifier.c:183 [inline] atomic_notifier_call_chain+0x96/0x190 kernel/notifier.c:193 notify_die+0x1b2/0x270 kernel/notifier.c:549 do_general_protection+0x13d/0x300 arch/x86/kernel/traps.c:557 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1142 lookup_object lib/debugobjects.c:156 [inline] debug_object_deactivate lib/debugobjects.c:542 [inline] debug_object_deactivate+0x16c/0x4b0 lib/debugobjects.c:529 debug_hrtimer_deactivate kernel/time/hrtimer.c:412 [inline] debug_deactivate kernel/time/hrtimer.c:462 [inline] __run_hrtimer kernel/time/hrtimer.c:1359 [inline] __hrtimer_run_queues+0x225/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 arch_local_irq_enable arch/x86/include/asm/paravirt.h:776 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x54/0x90 kernel/locking/spinlock.c:192 finish_lock_switch kernel/sched/core.c:2581 [inline] finish_task_switch+0x1e9/0xac0 kernel/sched/core.c:2681 context_switch kernel/sched/core.c:2834 [inline] __schedule+0x89f/0x1e90 kernel/sched/core.c:3472 schedule+0xfe/0x350 kernel/sched/core.c:3516 freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x208/0x750 kernel/time/hrtimer.c:1679 hrtimer_nanosleep+0x2e4/0x640 kernel/time/hrtimer.c:1733 __do_sys_nanosleep kernel/time/hrtimer.c:1767 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1754 [inline] __x64_sys_nanosleep+0x1e0/0x280 kernel/time/hrtimer.c:1754 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: (console_sem).lock --> &rq->lock --> &obj_hash[i].lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&obj_hash[i].lock); lock(&rq->lock); lock(&obj_hash[i].lock); lock((console_sem).lock); *** DEADLOCK *** 3 locks held by syz-executor1/8509: #0: 00000000df9a0e7b (hrtimer_bases.lock){-.-.}, at: hrtimer_interrupt+0xff/0x770 kernel/time/hrtimer.c:1490 #1: 00000000e947a71e (&obj_hash[i].lock){-.-.}, at: debug_object_deactivate lib/debugobjects.c:540 [inline] #1: 00000000e947a71e (&obj_hash[i].lock){-.-.}, at: debug_object_deactivate+0x101/0x4b0 lib/debugobjects.c:529 #2: 0000000064b5e2dd (rcu_read_lock){....}, at: atomic_notifier_call_chain+0x0/0x190 kernel/notifier.c:329 stack backtrace: CPU: 0 PID: 8509 Comm: syz-executor1 Not tainted 4.20.0+ #6 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+0x1db/0x2d0 lib/dump_stack.c:113 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1224 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2350 [inline] __lock_acquire+0x3014/0x4a30 kernel/locking/lockdep.c:3338 lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xa8/0x210 kernel/printk/printk.c:219 console_trylock+0x15/0xa0 kernel/printk/printk.c:2242 console_trylock_spinning kernel/printk/printk.c:1662 [inline] vprintk_emit+0x351/0x960 kernel/printk/printk.c:1930 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:1991 kasan_die_handler arch/x86/mm/kasan_init_64.c:252 [inline] kasan_die_handler.cold+0x11/0x23 arch/x86/mm/kasan_init_64.c:247 notifier_call_chain+0x179/0x380 kernel/notifier.c:93 __atomic_notifier_call_chain kernel/notifier.c:183 [inline] atomic_notifier_call_chain+0x96/0x190 kernel/notifier.c:193 notify_die+0x1b2/0x270 kernel/notifier.c:549 do_general_protection+0x13d/0x300 arch/x86/kernel/traps.c:557 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1142 RIP: 0010:lookup_object lib/debugobjects.c:156 [inline] RIP: 0010:debug_object_deactivate lib/debugobjects.c:542 [inline] RIP: 0010:debug_object_deactivate+0x16c/0x4b0 lib/debugobjects.c:529 Code: c1 ea 03 42 80 3c 2a 00 0f 85 49 02 00 00 4d 8b 24 24 4d 85 e4 0f 84 d1 00 00 00 49 8d 7c 24 18 83 c3 01 48 89 fa 48 c1 ea 03 <42> 80 3c 2a 00 0f 85 fa 01 00 00 49 3b 4c 24 18 75 c0 49 8d 7c 24 RSP: 0018:ffff8880ae607b80 EFLAGS: 00010006 RAX: 1ffffffff16dbb64 RBX: 0000000000000004 RCX: ffff8880ae626620 RDX: 0000000000000003 RSI: 0000000000000004 RDI: 0000000000000019 RBP: ffff8880ae607c70 R08: 1ffff11015cc0f5c R09: ffffffff899ad160 R10: 0000000000000086 R11: 0000000000000003 R12: 0000000000000001 R13: dffffc0000000000 R14: 1ffff11015cc0f74 R15: ffffffff8b6ddb28 debug_hrtimer_deactivate kernel/time/hrtimer.c:412 [inline] debug_deactivate kernel/time/hrtimer.c:462 [inline] __run_hrtimer kernel/time/hrtimer.c:1359 [inline] __hrtimer_run_queues+0x225/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 kernel/locking/spinlock.c:192 Code: c0 40 4f 92 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 85 5b 9f 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 82 c3 64 f9 65 8b 05 fb f9 0e 78 85 c0 74 06 41 RSP: 0018:ffff888093957888 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13249e8 RBX: 1ffff1101272af1a RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880979fac7c RBP: ffff888093957890 R08: ffff8880979fa400 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae62ce00 R13: ffff88809df9c040 R14: ffff88807ab06780 R15: ffff888093957950 finish_lock_switch kernel/sched/core.c:2581 [inline] finish_task_switch+0x1e9/0xac0 kernel/sched/core.c:2681 ? __swit Lost 50 message(s)! ---[ end trace e47dcfc1ee5ed8ea ]--- general protection fault: 0000 [#2] PREEMPT SMP KASAN CPU: 0 PID: 8509 Comm: syz-executor1 Tainted: G D 4.20.0+ #6 RIP: 0010:rb_set_parent_color include/linux/rbtree_augmented.h:131 [inline] RIP: 0010:____rb_erase_color lib/rbtree.c:271 [inline] RIP: 0010:rb_erase+0x7b0/0x3550 lib/rbtree.c:462 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Code: 89 a7 a0 fb ff ff 80 3c 1f 00 0f 85 25 23 00 00 48 c1 e9 03 48 89 c7 4d 89 66 10 48 c1 ef 03 c6 04 19 f8 4c 89 e1 48 83 c9 01 <80> 3c 1f 00 0f 85 54 23 00 00 48 89 08 4c 89 e1 48 c1 e9 03 80 3c RIP: 0010:lookup_object lib/debugobjects.c:156 [inline] RIP: 0010:debug_object_deactivate lib/debugobjects.c:542 [inline] RIP: 0010:debug_object_deactivate+0x16c/0x4b0 lib/debugobjects.c:529 RSP: 0018:ffff8880ae707698 EFLAGS: 00010082 Code: c1 ea 03 42 80 3c 2a 00 0f 85 49 02 00 00 4d 8b 24 24 4d 85 e4 0f 84 d1 00 00 00 49 8d 7c 24 18 83 c3 01 48 89 fa 48 c1 ea 03 <42> 80 3c 2a 00 0f 85 fa 01 00 00 49 3b 4c 24 18 75 c0 49 8d 7c 24 RAX: 1c47e888753ca400 RBX: dffffc0000000000 RCX: ffff88807ccb78d9 RSP: 0018:ffff8880ae607b80 EFLAGS: 00010006 RDX: 1ffff11015ce0edb RSI: ffffed1015ce0f07 RDI: 0388fd110ea79480 RAX: 1ffffffff16dbb64 RBX: 0000000000000004 RCX: ffff8880ae626620 RBP: ffff8880ae707c00 R08: ffff88807ccb78e0 R09: ffff8880a9427470 RDX: 0000000000000003 RSI: 0000000000000004 RDI: 0000000000000019 R10: fffffbfff16d4c6d R11: ffffffff8b6a636b R12: ffff88807ccb78d8 RBP: ffff8880ae607c70 R08: 1ffff11015cc0f5c R09: ffffffff899ad160 R13: ffff8880ae725e00 R14: ffff8880a9427460 R15: ffff8880ae707bd8 R10: 0000000000000086 R11: 0000000000000003 R12: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 R13: dffffc0000000000 R14: 1ffff11015cc0f74 R15: ffffffff8b6ddb28 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 FS: 000000000267c940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CR2: 0000000000000068 CR3: 00000000a48e9000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 CR2: 00007f678ca7b000 CR3: 0000000096054000 CR4: 00000000001406f0