general protection fault in rb

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
kernel panic: corrupted stack end in wb_workfn mm	C	done		14	1943d	1944d

done

1943d

1944d

Title	Replies (including bot)	Last reply
general protection fault in rb_next (2)	1 (2)	2018/12/31 07:15

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general protection fault in rb_next (2)

1 (2)

2018/12/31 07:15

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in rb_next (3) kernel	syz	done	done	1	1777d	1775d	12/26	fixed on 2019/08/27 17:15
upstream	general protection fault in rb_next kernel				1	2110d	2110d	8/26	fixed on 2018/08/07 13:43

kasan: CONFIG_KASAN_INLINE enabled 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: 64 Comm: ksoftirq³œ1 Not tainted 4.20.0+ #13 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rb_next+0xd7/0x140 lib/rbtree.c:541 Code: 49 89 dc 4c 89 eb 48 83 e3 fc 48 89 d8 75 c8 48 83 c4 08 5b 41 5c 41 5d 41 5e 5d c3 48 89 d0 48 8d 78 10 48 89 fa 48 c1 ea 03 <80> 3c 1a 00 75 1a 48 8b 50 10 48 85 d2 75 e3 48 83 c4 08 5b 41 5c RSP: 0018:ffff8880ae707bd8 EFLAGS: 00010002 RAX: 0000000041b58ab3 RBX: dffffc0000000000 RCX: ffffffff87ee38f0 RDX: 000000000836b158 RSI: 0000000000000008 RDI: 0000000041b58ac3 RBP: ffff8880ae707c00 R08: ffff8880a94ba440 R09: fffffbfff16d60be R10: fffffbfff16d60bd R11: ffffffff8b6b05eb R12: ffff8880ae726620 R13: ffff8880ae7268c1 R14: dffffc0000000000 R15: ffff8880ae725d40 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000068 CR3: 0000000092a61000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> timerqueue_del+0xd8/0x150 lib/timerqueue.c:83 __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 </IRQ> Modules linked in: ====================================================== WARNING: possible circular locking dependency detected 4.20.0+ #13 Not tainted ------------------------------------------------------ modprobe/18936 is trying to acquire lock: 00000000474bda00 ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: 000000003f9907be (&obj_hash[i].lock){-.-.}, at: __debug_check_no_obj_freed lib/debugobjects.c:776 [inline] 000000003f9907be (&obj_hash[i].lock){-.-.}, at: debug_check_no_obj_freed+0x170/0x588 lib/debugobjects.c:817 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: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:10058 sched_fork+0x437/0xb90 kernel/sched/core.c:2359 copy_process+0x1ff6/0x8730 kernel/fork.c:1888 _do_fork+0x1a9/0x1170 kernel/fork.c:2217 kernel_thread+0x34/0x40 kernel/fork.c:2276 rest_init+0x28/0x37b init/main.c:408 arch_call_rest_init+0xe/0x1b start_kernel+0x882/0x8bd init/main.c:740 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+0x57/0x16a 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: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 __debug_check_no_obj_freed lib/debugobjects.c:777 [inline] debug_check_no_obj_freed+0x1a6/0x588 lib/debugobjects.c:817 kmem_cache_free+0x192/0x260 mm/slab.c:3746 putname+0xef/0x130 fs/namei.c:261 filename_lookup+0x359/0x530 fs/namei.c:2357 user_path_at_empty+0x43/0x50 fs/namei.c:2608 user_path_at include/linux/namei.h:57 [inline] do_faccessat+0x26e/0x860 fs/open.c:378 __do_sys_access fs/open.c:430 [inline] __se_sys_access fs/open.c:428 [inline] __x64_sys_access+0x59/0x80 fs/open.c:428 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 *** 2 locks held by modprobe/18936: #0: 000000003f9907be (&obj_hash[i].lock){-.-.}, at: __debug_check_no_obj_freed lib/debugobjects.c:776 [inline] #0: 000000003f9907be (&obj_hash[i].lock){-.-.}, at: debug_check_no_obj_freed+0x170/0x588 lib/debugobjects.c:817 #1: 00000000bd38cd39 (rcu_read_lock){....}, at: atomic_notifier_call_chain+0x0/0x190 kernel/notifier.c:329 stack backtrace: CPU: 0 PID: 18936 Comm: modprobe Not tainted 4.20.0+ #13 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:__debug_check_no_obj_freed lib/debugobjects.c:777 [inline] RIP: 0010:debug_check_no_obj_freed+0x1a6/0x588 lib/debugobjects.c:817 Code: ff ff 80 38 00 0f 85 96 03 00 00 48 8b 85 50 ff ff ff 4c 8b 20 4d 85 e4 0f 84 8b 02 00 00 31 c9 41 89 cd 4c 89 e0 48 c1 e8 03 <42> 80 3c 38 00 0f 85 9d 02 00 00 49 8d 7c 24 18 41 83 c5 01 49 8b RSP: 0018:ffff88808c2b7a48 EFLAGS: 00010802 RAX: 18777c6fdaebbb40 RBX: c3bbe37ed75dda00 RCX: 0000000000000000 RDX: 1ffffffff16cdf67 RSI: 0000000000000004 RDI: ffff8880a8ed3478 RBP: ffff88808c2b7b30 R08: 1ffff11011856f35 R09: ffffed1011856f36 R10: ffffed1011856f35 R11: 0000000000000003 R12: c3bbe37ed75dda00 R13: 0000000000000001 R14: ffffffff8b66fb28 R15: dffffc0000000000 kmem_cache_free+0x192/0x260 mm/slab.c:3746 putname+0xef/0x130 fs/namei.c:261 filename_lookup+0x359/0x530 fs/namei.c:2357 user_path_at_empty+0x43/0x50 fs/namei.c:2608 user_path_at include/linux/namei.h:57 [inline] do_faccessat+0x26e/0x860 fs/open.c:378 __do_sys_access fs/open.c:430 [inline] __se_sys_access fs/open.c:428 [inline] __x64_sys_access+0x59/0x80 fs/open.c:428 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f7faf18b267 Code: 73 01 c3 48 8d 0d 3d af 20 00 31 d2 48 29 c2 89 11 48 83 c8 ff eb eb 90 90 90 90 90 90 90 90 90 90 90 90 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 0d af 20 00 31 d2 48 29 c2 89 RSP: 002b:00007ffe1c62df98 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007f7faf3961c8 RCX: 00007f7faf18b267 RDX: 00007f7faf175158 RSI: 0000000000000004 RDI: 00007f7faf191e30 RBP: 00007ffe1c62e0f0 R08: 00007f7faf396770 R09: 0000000000000050 R10: ffffffffffffffb0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe1c7452f4 R14: 00007f7faf396bc8 R15: 0000000000000000 ---[ end trace 8eb95c440de05a46 ]--- general protection fault: 0000 [#2] PREEMPT SMP KASAN CPU: 0 PID: 18936 Comm: modprobe Tainted: G D 4.20.0+ #13 RIP: 0010:rb_next+0xd7/0x140 lib/rbtree.c:541 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Code: 49 89 dc 4c 89 eb 48 83 e3 fc 48 89 d8 75 c8 48 83 c4 08 5b 41 5c 41 5d 41 5e 5d c3 48 89 d0 48 8d 78 10 48 89 fa 48 c1 ea 03 <80> 3c 1a 00 75 1a 48 8b 50 10 48 85 d2 75 e3 48 83 c4 08 5b 41 5c RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:777 [inline] RIP: 0010:debug_check_no_obj_freed+0x1a6/0x588 lib/debugobjects.c:817 RSP: 0018:ffff8880ae707bd8 EFLAGS: 00010002 Code: ff ff 80 38 00 0f 85 96 03 00 00 48 8b 85 50 ff ff ff 4c 8b 20 4d 85 e4 0f 84 8b 02 00 00 31 c9 41 89 cd 4c 89 e0 48 c1 e8 03 <42> 80 3c 38 00 0f 85 9d 02 00 00 49 8d 7c 24 18 41 83 c5 01 49 8b RAX: 0000000041b58ab3 RBX: dffffc0000000000 RCX: ffffffff87ee38f0 RSP: 0018:ffff88808c2b7a48 EFLAGS: 00010802 RDX: 000000000836b158 RSI: 0000000000000008 RDI: 0000000041b58ac3 RBP: ffff8880ae707c00 R08: ffff8880a94ba440 R09: fffffbfff16d60be RAX: 18777c6fdaebbb40 RBX: c3bbe37ed75dda00 RCX: 0000000000000000 R10: fffffbfff16d60bd R11: ffffffff8b6b05eb R12: ffff8880ae726620 RDX: 1ffffffff16cdf67 RSI: 0000000000000004 RDI: ffff8880a8ed3478 R13: ffff8880ae7268c1 R14: dffffc0000000000 R15: ffff8880ae725d40 RBP: ffff88808c2b7b30 R08: 1ffff11011856f35 R09: ffffed1011856f36 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 R10: ffffed1011856f35 R11: 0000000000000003 R12: c3bbe37ed75dda00 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 R13: 0000000000000001 R14: ffffffff8b66fb28 R15: dffffc0000000000 CR2: 0000000000000068 CR3: 0000000092a61000 CR4: 00000000001426e0 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 CR2: 00007f7faf191e30 CR3: 0000000054b4d000 CR4: 00000000001426f0

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2019/01/07 08:45	upstream	574823bfab82	ee332608	.config	console log	report					ci-upstream-kasan-gce-smack-root
2018/11/23 04:36	upstream	edeca3a769ad	87815d9d	.config	console log	report					ci-upstream-kasan-gce-selinux-root

Crashes (2):

Assets (help?)