On Wed, Nov 1, 2017 at 11:05 PM, syzbot <bot+d9fbc5c299aa8a95ac07572b4f6e191c0f4efff6@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Hello, > > syzkaller hit the following crash on > 045c5205823fc3cd4e5cafdedb2cc7d434424909 > 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. > C reproducer is attached > syzkaller reproducer is attached. See https://goo.gl/kgGztJ > for information about syzkaller reproducers This happens on more recent commits as well, including e.g. upstream 5f479447d983111c039f1d6d958553c1ad1b2ff1(Oct 30): ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6790 at arch/x86/kvm/x86.c:7265 kvm_arch_vcpu_ioctl_run+0x213/0x5c70 arch/x86/kvm/x86.c:7265 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 6790 Comm: syz-executor4 Not tainted 4.14.0-rc7+ #155 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 panic+0x1e4/0x417 kernel/panic.c:181 __warn+0x1c4/0x1d9 kernel/panic.c:542 report_bug+0x211/0x2d0 lib/bug.c:183 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline] do_trap+0x260/0x390 arch/x86/kernel/traps.c:261 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905 RIP: 0010:kvm_arch_vcpu_ioctl_run+0x213/0x5c70 arch/x86/kvm/x86.c:7265 RSP: 0018:ffff8801c5307670 EFLAGS: 00010212 RAX: 0000000000010000 RBX: ffff8801d2da1000 RCX: ffffc9000244f000 RDX: 000000000000003e RSI: ffffffff810e0713 RDI: ffff8801c6da1160 RBP: ffff8801c5307a40 R08: 1ffff10038db4abb R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000004 R12: 0000000000000000 R13: ffff8801c18d4700 R14: ffff8801c26f1300 R15: ffff8801c6da0f40 kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2551 vfs_ioctl fs/ioctl.c:45 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:685 SYSC_ioctl fs/ioctl.c:700 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x452869 RSP: 002b:00007f61c0ff0be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000007580d8 RCX: 0000000000452869 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000017 RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f1580 R13: 00000000ffffffff R14: 00007f61c0ff16d4 R15: 0000000000000001 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. > EPT pointer = 0x00000001cbc2801e > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 3247 at arch/x86/kvm/x86.c:7265 > kvm_arch_vcpu_ioctl_run+0x213/0x5c70 arch/x86/kvm/x86.c:7265 > Kernel panic - not syncing: panic_on_warn set ... > > CPU: 0 PID: 3247 Comm: syzkaller201086 Not tainted 4.14.0-rc2-next-20170927+ > #30 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:16 [inline] > dump_stack+0x194/0x257 lib/dump_stack.c:52 > panic+0x1e4/0x417 kernel/panic.c:181 > __warn+0x1c4/0x1d9 kernel/panic.c:542 > report_bug+0x211/0x2d0 lib/bug.c:183 > fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178 > do_trap_no_signal arch/x86/kernel/traps.c:212 [inline] > do_trap+0x260/0x390 arch/x86/kernel/traps.c:261 > do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298 > do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311 > invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905 > RIP: 0010:kvm_arch_vcpu_ioctl_run+0x213/0x5c70 arch/x86/kvm/x86.c:7265 > RSP: 0018:ffff8801cb807670 EFLAGS: 00010297 > RAX: ffff8801cbf28280 RBX: ffff8801cbef1000 RCX: ffff8801cd678adc > RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801cd6788f8 > RBP: ffff8801cb807a40 R08: 0000000000000000 R09: 0000000000000001 > R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 > R13: 1ffff10039700f72 R14: ffff8801d6928c00 R15: ffff8801cd6786c0 > kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2551 > vfs_ioctl fs/ioctl.c:45 [inline] > do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685 > SYSC_ioctl fs/ioctl.c:700 [inline] > SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 > entry_SYSCALL_64_fastpath+0x1f/0xbe > RIP: 0033:0x446039 > RSP: 002b:00007f520767adc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000446039 > RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000000f > RBP: 0000000000000086 R08: 00007f520767b700 R09: 00007f520767b700 > R10: 00007f520767b700 R11: 0000000000000202 R12: 0000000000000000 > R13: 00007ffdb6946c2f R14: 00007f520767b9c0 R15: 0000000000000000 > Dumping ftrace buffer: > (ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds.. > > > --- > 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. > > -- > 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/001a114aa95cf6decb055cf1623b%40google.com. > For more options, visit https://groups.google.com/d/optout.
