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Fri, 21 Jun 2019 05:57:08 -0700 (PDT) Date: Fri, 21 Jun 2019 05:57:08 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000008f38a058bd500b9@google.com> Subject: BUG: unable to handle kernel paging request in cpuacct_account_field From: syzbot To: fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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: syzbot+a952f743523593b39174@syzkaller.appspotmail.com 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: 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 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 syzkaller@googlegroups.com. 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