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 Regards, Wanpeng Li
