IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 kasan: CONFIG_KASAN_INLINE enabled ================================================================== BUG: KASAN: stack-out-of-bounds in lookup_object lib/debugobjects.c:156 [inline] BUG: KASAN: stack-out-of-bounds in debug_object_deactivate lib/debugobjects.c:542 [inline] BUG: KASAN: stack-out-of-bounds in debug_object_deactivate+0x385/0x4b0 lib/debugobjects.c:529 kasan: GPF could be caused by NULL-ptr deref or user memory access Read of size 8 at addr ffff8880a854cab8 by task swapper/0/0 general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 7907 Comm: syz-executor466 Not tainted 4.20.0+ #3 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.20.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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 Call Trace: 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:ffff8880ae707b80 EFLAGS: 00010006 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 RAX: 1ffffffff16d4c90 RBX: 0000000000000009 RCX: ffff8880ae726620 RDX: 0000000000000003 RSI: 0000000000000004 RDI: 0000000000000019 RBP: ffff8880ae707c70 R08: 1ffff11015ce0f5c R09: ffffffff899ae220 R10: 0000000000000082 R11: 0000000000000003 R12: 0000000000000001 R13: dffffc0000000000 R14: 1ffff11015ce0f74 R15: ffffffff8b6a6488 FS: 0000000001eec880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200000c0 CR3: 00000000a1bf5000 CR4: 00000000001406e0 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 lookup_object lib/debugobjects.c:156 [inline] debug_object_deactivate lib/debugobjects.c:542 [inline] debug_object_deactivate+0x385/0x4b0 lib/debugobjects.c:529 Call Trace: 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 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 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:native_safe_halt+0x2/0x10 arch/x86/include/asm/irqflags.h:58 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 Code: ff ff ff 48 89 c7 48 89 45 d8 e8 c9 1a ce f9 48 8b 45 d8 e9 ce fe ff ff 48 89 df e8 b8 1a ce f9 eb 82 90 90 90 90 90 90 fb f4 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 f4 c3 90 90 90 90 90 90 RSP: 0018:ffffffff89807c60 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 Modules linked in: RAX: 1ffffffff1324a09 RBX: 1ffffffff1300f8f RCX: 0000000000000000 ====================================================== WARNING: possible circular locking dependency detected 4.20.0+ #3 Not tainted ------------------------------------------------------ syz-executor466/7907 is trying to acquire lock: 000000004bb77632 ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: 00000000bf17e612 (&obj_hash[i].lock){-.-.}, at: debug_object_deactivate lib/debugobjects.c:540 [inline] 00000000bf17e612 (&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+0x440/0x8bd init/main.c:608 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:10083 sched_fork+0x437/0xb90 kernel/sched/core.c:2359 copy_process+0x1ff6/0x8730 kernel/fork.c:1892 _do_fork+0x1a9/0x1170 kernel/fork.c:2221 kernel_thread+0x34/0x40 kernel/fork.c:2280 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 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 check_stack_usage kernel/exit.c:755 [inline] do_exit.cold+0x155/0x16a kernel/exit.c:916 do_group_exit+0x177/0x430 kernel/exit.c:970 __do_sys_exit_group kernel/exit.c:981 [inline] __se_sys_exit_group kernel/exit.c:979 [inline] __x64_sys_exit_group+0x44/0x50 kernel/exit.c:979 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #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:250 [inline] kasan_die_handler.cold+0x11/0x23 arch/x86/mm/kasan_init_64.c:245 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 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 *** 6 locks held by syz-executor466/7907: #0: 000000000ef89f7e (&tfile->napi_mutex){+.+.}, at: tun_get_user+0x125f/0x4150 drivers/net/tun.c:1842 #1: 000000002e28d845 (rcu_read_lock){....}, at: arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline] #1: 000000002e28d845 (rcu_read_lock){....}, at: netif_receive_skb_internal+0x9c/0x690 net/core/dev.c:5160 #2: 000000002e28d845 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2158 [inline] #2: 000000002e28d845 (rcu_read_lock){....}, at: ip_local_deliver_finish+0x13a/0x390 net/ipv4/ip_input.c:231 #3: 000000006ea68e3b (hrtimer_bases.lock){-.-.}, at: hrtimer_interrupt+0xff/0x770 kernel/time/hrtimer.c:1490 #4: 00000000bf17e612 (&obj_hash[i].lock){-.-.}, at: debug_object_deactivate lib/debugobjects.c:540 [inline] #4: 00000000bf17e612 (&obj_hash[i].lock){-.-.}, at: debug_object_deactivate+0x101/0x4b0 lib/debugobjects.c:529 #5: 000000002e28d845 (rcu_read_lock){....}, at: atomic_notifier_call_chain+0x0/0x190 kernel/notifier.c:329 stack backtrace: CPU: 1 PID: 7907 Comm: syz-executor466 Not tainted 4.20.0+ #3 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:250 [inline] kasan_die_handler.cold+0x11/0x23 arch/x86/mm/kasan_init_64.c:245 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:ffff8880ae707b80 EFLAGS: 00010006 RAX: 1ffffffff16d4c90 RBX: 0000000000000009 RCX: ffff8880ae726620 RDX: 0000000000000003 RSI: 0000000000000004 RDI: 0000000000000019 RBP: ffff8880ae707c70 R08: 1ffff11015ce0f5c R09: ffffffff899ae220 R10: 0000000000000082 R11: 0000000000000003 R12: 0000000000000001 R13: dffffc0000000000 R14: 1ffff11015ce0f74 R15: ffffffff8b6a6488 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 ---[ end trace 9991f0df0986b6d9 ]--- RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff8987b73c 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 RBP: ffffffff89807d20 R08: ffffffff8987aec0 R09: 0000000000000000 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 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 RSP: 0018:ffff8880ae707b80 EFLAGS: 00010006 R13: ffffffff89807cf8 R14: 0000000000000000 R15: ffffffff89925038 RAX: 1ffffffff16d4c90 RBX: 0000000000000009 RCX: ffff8880ae726620 RDX: 0000000000000003 RSI: 0000000000000004 RDI: 0000000000000019 RBP: ffff8880ae707c70 R08: 1ffff11015ce0f5c R09: ffffffff899ae220 R10: 0000000000000082 R11: 0000000000000003 R12: 0000000000000001 R13: dffffc0000000000 R14: 1ffff11015ce0f74 R15: ffffffff8b6a6488 FS: 0000000001eec880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200000c0 CR3: 00000000a1bf5000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:555 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 default_idle_call+0x36/0x90 kernel/sched/idle.c:93