On Fri, 21 Jun 2019, syzbot wrote: Cc+: ....
> Hello, > > syzbot found the following crash on: > > HEAD commit: abf02e29 Merge tag 'pm-5.2-rc6' of git://git.kernel.org/pu.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=164d94f6a00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=e5c77f8090a3b96b > dashboard link: https://syzkaller.appspot.com/bug?extid=a952f743523593b39174 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1372abc6a00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: [email protected] > > BUG: unable to handle page fault for address: ffffde202771d9b9 > #PF: supervisor read access in kernel mode > #PF: error_code(0x0000) - not-present page > PGD 0 P4D 0 > Thread overran stack, or stack corrupted > Oops: 0000 [#1] PREEMPT SMP KASAN > CPU: 1 PID: 8777 Comm: syz-executor.5 Not tainted 5.2.0-rc5+ #38 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google > 01/01/2011 > RIP: 0010:cpuacct_account_field+0x12b/0x2f0 kernel/sched/cpuacct.c:366 > Code: c5 60 02 75 88 48 89 fa 48 c1 ea 03 42 80 3c 32 00 0f 85 81 01 00 00 48 > 03 1c c5 60 02 75 88 4a 8d 3c 3b 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 > 89 01 00 00 4e 01 2c 3b 49 8d bc 24 28 01 00 > RSP: 0018:ffff8880ae909c78 EFLAGS: 00010802 > RAX: 1fffe2202771d9b9 RBX: ffff11013b8ecdb8 RCX: ffffffff83358d3e > RDX: 1ffffffff10ea04d RSI: ffffffff83358d4c RDI: ffff11013b8ecdc8 > RBP: ffff8880ae909ca8 R08: ffff888090866500 R09: 0000000000000001 > R10: fffffbfff1141b45 R11: ffff888090866500 R12: ffff88808cfecc80 > R13: 0000000000966a20 R14: dffffc0000000000 R15: 0000000000000010 > FS: 0000555555ff5940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffffde202771d9b9 CR3: 000000008533e000 CR4: 00000000001406e0 > Call Trace: > <IRQ> > cgroup_account_cputime_field include/linux/cgroup.h:789 [inline] > task_group_account_field kernel/sched/cputime.c:109 [inline] > account_system_index_time+0x11d/0x390 kernel/sched/cputime.c:172 > irqtime_account_process_tick.isra.0+0x386/0x490 kernel/sched/cputime.c:389 > account_process_tick+0x27f/0x350 kernel/sched/cputime.c:484 > update_process_times+0x25/0x80 kernel/time/timer.c:1637 > tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 > tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1298 > __run_hrtimer kernel/time/hrtimer.c:1389 [inline] > __hrtimer_run_queues+0x33b/0xdd0 kernel/time/hrtimer.c:1451 > hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 > local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] > smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1066 > apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806 > </IRQ> > Modules linked in: > CR2: ffffde202771d9b9 > ---[ end trace 4a0799d29c250606 ]--- > RIP: 0010:cpuacct_account_field+0x12b/0x2f0 kernel/sched/cpuacct.c:366 > Code: c5 60 02 75 88 48 89 fa 48 c1 ea 03 42 80 3c 32 00 0f 85 81 01 00 00 48 > 03 1c c5 60 02 75 88 4a 8d 3c 3b 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 > 89 01 00 00 4e 01 2c 3b 49 8d bc 24 28 01 00 > RSP: 0018:ffff8880ae909c78 EFLAGS: 00010802 > RAX: 1fffe2202771d9b9 RBX: ffff11013b8ecdb8 RCX: ffffffff83358d3e > RDX: 1ffffffff10ea04d RSI: ffffffff83358d4c RDI: ffff11013b8ecdc8 > RBP: ffff8880ae909ca8 R08: ffff888090866500 R09: 0000000000000001 > R10: fffffbfff1141b45 R11: ffff888090866500 R12: ffff88808cfecc80 > R13: 0000000000966a20 R14: dffffc0000000000 R15: 0000000000000010 > FS: 0000555555ff5940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffffde202771d9b9 CR3: 000000008533e000 CR4: 00000000001406e0 > > > --- > This bug is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at [email protected]. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this bug, for details see: > https://goo.gl/tpsmEJ#testing-patches
