On Mon, Nov 20, 2017 at 10:19 AM, Wanpeng Li <kernellwp@xxxxxxxxx> wrote: > Hi Dmitry, > 2017-11-20 12:09 GMT+08:00 Wanpeng Li <kernellwp@xxxxxxxxx>: >> 2017-11-18 4:22 GMT+08:00 syzbot >> <bot+d9fbc5c299aa8a95ac07572b4f6e191c0f4efff6@xxxxxxxxxxxxxxxxxxxxxxxxx>: >>> Hello, >>> >>> syzbot has tested the proposed patch but the reproducer still triggered >>> crash: >>> WARNING in kvm_arch_vcpu_ioctl_run >>> >>> VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 >>> reason=80000021 qualification=0000000000000000 >>> IDTVectoring: info=00000000 errcode=00000000 >>> TSC Offset = 0xffffffeeb46bc6ac >>> EPT pointer = 0x00000001ce37601e >>> WARNING: CPU: 0 PID: 3023 at arch/x86/kvm/x86.c:7293 >>> kvm_arch_vcpu_ioctl_run+0x213/0x5d20 >>> Kernel panic - not syncing: panic_on_warn set ... >>> >>> CPU: 0 PID: 3023 Comm: syz-executor4 Not tainted 4.14.0-next-20171117+ #9 >>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS >>> Google 01/01/2011 >>> Call Trace: >>> dump_stack+0x173/0x237 >>> panic+0x1e4/0x41c >>> __warn+0x1d9/0x1f0 >>> report_bug+0x20a/0x2d0 >>> fixup_bug.part.10+0x32/0x80 >>> do_error_trap+0x29c/0x370 >>> invalid_op+0x18/0x20 >>> RIP: 0010:kvm_arch_vcpu_ioctl_run+0x213/0x5d20 >>> RSP: 0018:ffff8801ce197680 EFLAGS: 00010293 >>> RAX: ffff8801ce588440 RBX: ffff8801d5b8f000 RCX: ffffffff810d4003 >>> RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801ce0e02b8 >>> RBP: ffff8801ce197a50 R08: 0000000000000001 R09: 0000000000000001 >>> R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 >>> R13: ffff8801ce0e0168 R14: ffff8801cec10980 R15: ffff8801ce0e0080 >>> kvm_vcpu_ioctl+0x619/0xf80 >>> do_vfs_ioctl+0x18b/0x13e0 >>> SyS_ioctl+0x7e/0xb0 >>> entry_SYSCALL_64_fastpath+0x1f/0x96 >>> RIP: 0033:0x452879 >>> RSP: 002b:00007f4bc97fdbe8 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 >>> RAX: ffffffffffffffda RBX: 0000000000000082 RCX: 0000000000452879 >>> RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000004 >>> RBP: 00007ffce1993510 R08: 0000000000000000 R09: 0000000000000000 >>> R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000 >>> R13: 00007ffce199348f R14: 00007f4bc97fe9c0 R15: 0000000000000006 >>> Dumping ftrace buffer: >>> (ftrace buffer empty) >>> Kernel Offset: disabled >>> Rebooting in 86400 seconds.. >> >> I will have a look. > > Please have a try. https://lkml.org/lkml/2017/11/20/118 Hi Wanpeng, There is shiny new feature being rolled for syzbot, see "#syz test" here: https://github.com/google/syzkaller/blob/master/docs/syzbot.md#communication-with-syzbot Please have a try ;)
