protocol 88fb is buggy, dev hsr_slave_1 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: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.20.0+ #396 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:task_css include/linux/cgroup.h:479 [inline] RIP: 0010:task_ca kernel/sched/cpuacct.c:43 [inline] RIP: 0010:cpuacct_account_field+0x140/0x3d0 kernel/sched/cpuacct.c:365 Code: 76 95 08 00 85 c0 74 0d 80 3d 77 3a d4 08 00 0f 84 a4 01 00 00 49 8d 7e 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4e 02 00 00 4d 8b 7e 10 49 81 ff 00 52 78 89 0f RSP: 0018:ffff8880ae6078a8 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: ffff8880ae607918 RCX: ffffffff81627a44 RDX: 000000000836b158 RSI: 0000000000000008 RDI: 0000000041b58ac3 RBP: ffff8880ae607940 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff0dda544 R11: ffffffff86ed2a27 R12: 00000000008f6c0c R13: dffffc0000000000 R14: 0000000041b58ab3 R15: ffff8880a9424240 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f09b5006518 CR3: 0000000092652000 CR4: 00000000001406f0 Call Trace: cgroup_account_cputime_field include/linux/cgroup.h:777 [inline] task_group_account_field kernel/sched/cputime.c:108 [inline] account_system_index_time+0x1e8/0x5d0 kernel/sched/cputime.c:171 irqtime_account_process_tick.isra.6+0x38e/0x490 kernel/sched/cputime.c:380 account_process_tick+0x282/0x350 kernel/sched/cputime.c:483 update_process_times+0x21/0x70 kernel/time/timer.c:1633 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:161 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 Modules linked in: ---[ end trace 2916bd7896708b7c ]--- general protection fault: 0000 [#2] PREEMPT SMP KASAN CPU: 1 PID: 8135 Comm: syz-executor0 Tainted: G D 4.20.0+ #396 RIP: 0010:task_css include/linux/cgroup.h:479 [inline] RIP: 0010:task_ca kernel/sched/cpuacct.c:43 [inline] RIP: 0010:cpuacct_account_field+0x140/0x3d0 kernel/sched/cpuacct.c:365 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Code: 76 95 08 00 85 c0 74 0d 80 3d 77 3a d4 08 00 0f 84 a4 01 00 00 49 8d 7e 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4e 02 00 00 4d 8b 7e 10 49 81 ff 00 52 78 89 0f RIP: 0010:lock_accessed kernel/locking/lockdep.c:968 [inline] RIP: 0010:__bfs+0x2dd/0x7a0 kernel/locking/lockdep.c:1035 RSP: 0018:ffff8880ae6078a8 EFLAGS: 00010002 Code: 4a 01 00 00 48 8d 7b 10 48 89 d8 4c 8b 1d bb 25 cd 09 48 89 f9 48 2d 60 76 10 8b 44 8b 15 0b 24 40 09 48 c1 e9 03 48 c1 f8 06 <42> 80 3c 21 00 0f 85 37 03 00 00 4c 8b 43 10 49 8d 70 2c 48 89 f1 RAX: dffffc0000000000 RBX: ffff8880ae607918 RCX: ffffffff81627a44 RSP: 0018:ffff8880ae706860 EFLAGS: 00010003 RDX: 000000000836b158 RSI: 0000000000000008 RDI: 0000000041b58ac3 RAX: 0000000001d3be26 RBX: 0000000000000000 RCX: 0000000000000002 RBP: ffff8880ae607940 R08: 0000000000000000 R09: 0000000000000000 RDX: 1ffff11015ce0d25 RSI: 0000000000000001 RDI: 0000000000000010 R10: fffffbfff0dda544 R11: ffffffff86ed2a27 R12: 00000000008f6c0c R13: dffffc0000000000 R14: 0000000041b58ab3 R15: ffff8880a9424240 RBP: ffff8880ae7069d0 R08: 1ffff11015ce0d2d R09: ffffffff8b0800d0 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 R10: 000000000000fa9a R11: 00000000000024b0 R12: dffffc0000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 R13: ffffffff8b0800d0 R14: ffffed1015ce0d2d R15: ffff8880ae7069a8 CR2: 00007f09b5006518 CR3: 0000000092652000 CR4: 00000000001406f0 FS: 00007f7e0d406700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000