On Sun, Dec 3, 2017 at 3:28 PM, syzbot <bot+51154054bce9a47d13fe39992500c94154513813@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Hello, > > syzkaller hit the following crash on > d127129e85a020879f334154300ddd3f7ec21c1e > git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached > Raw console output is attached. > > Unfortunately, I don't have any reproducer for this bug yet. > > > BUG: unable to handle kernel paging request at fffffffffffffff8 > IP: wait_lapic_expire+0x98/0x7f0 arch/x86/kvm/lapic.c:1396 > PGD 5e28067 P4D 5e28067 PUD 5e2a067 PMD 0 > Oops: 0002 [#1] SMP KASAN > Dumping ftrace buffer: > (ftrace buffer empty) > Modules linked in: > CPU: 0 PID: 4463 Comm: syz-executor4 Not tainted 4.15.0-rc1-next-20171129+ > #55 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > task: ffff8801cde40380 task.stack: ffff8801ced38000 > RIP: 0010:wait_lapic_expire+0x98/0x7f0 arch/x86/kvm/lapic.c:1396 > RSP: 0018:ffff8801ced3f5c0 EFLAGS: 00010046 > RAX: 1ffff1003a0ce0f4 RBX: 1ffff10039da7ebb RCX: ffffffff81167488 > RDX: 000000000000284c RSI: ffffc900030e0000 RDI: ffff8801d06707a0 > RBP: ffff8801ced3f6a0 R08: ffff88018f4adf58 R09: 1ffff10039da7eaf > R10: ffff8801cde40380 R11: 0000000000000001 R12: ffff8801d06b12c0 > R13: ffff8801d06703c0 R14: ffff8801d06703f0 R15: ffff8801d06703c0 > FS: 00007f4acd2f5700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: fffffffffffffff8 CR3: 00000001d1531000 CR4: 00000000001426f0 > Call Trace: > vcpu_enter_guest arch/x86/kvm/x86.c:7011 [inline] > vcpu_run arch/x86/kvm/x86.c:7146 [inline] > kvm_arch_vcpu_ioctl_run+0x182c/0x5c60 arch/x86/kvm/x86.c:7314 > kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2574 > vfs_ioctl fs/ioctl.c:46 [inline] > do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686 > SYSC_ioctl fs/ioctl.c:701 [inline] > SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 > entry_SYSCALL_64_fastpath+0x1f/0x96 > RIP: 0033:0x4529d9 > RSP: 002b:00007f4acd2f4c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00000000007580d8 RCX: 00000000004529d9 > RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000001a > RBP: 0000000000000214 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f0280 > R13: 00000000ffffffff R14: 00007f4acd2f56d4 R15: 0000000000000021 > Code: 40 10 f3 f3 f3 f3 e8 88 c6 59 00 49 8d bd e0 03 00 00 48 89 f8 48 c1 > e8 03 42 80 3c 20 00 0f 85 f2 06 00 00 4d 8b a5 e0 03 00 00 <cc> 1f 44 00 00 > e8 5e c6 59 00 4d 8d 7c 24 70 e8 54 c6 59 00 4c > RIP: wait_lapic_expire+0x98/0x7f0 arch/x86/kvm/lapic.c:1396 RSP: > ffff8801ced3f5c0 > CR2: fffffffffffffff8 > ---[ end trace ce0f60eca9bd2476 ]--- > Kernel panic - not syncing: Fatal exception > Dumping ftrace buffer: > (ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds.. #syz dup: BUG: unable to handle kernel paging request in __switch_to > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkaller@xxxxxxxxxxxxxxxx. > Please credit me with: Reported-by: syzbot <syzkaller@xxxxxxxxxxxxxxxx> > > syzbot will keep track of this bug report. > Once a fix for this bug is committed, please reply to this email with: > #syz fix: exact-commit-title > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report > If it's a one-off invalid bug report, please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug > report. > Note: all commands must start from beginning of the line in the email body. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/001a113ebf62ae86a6055f7068cd%40google.com. > For more options, visit https://groups.google.com/d/optout.
