2017-12-08 11:22 GMT+08:00 syzbot <bot+75375385991b4f8c599704a10849863c586ea284@xxxxxxxxxxxxxxxxxxxxxxxxx>: > syzkaller has found reproducer for the following crash on > 968edbd93c0cbb40ab48aca972392d377713a0c3 > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.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 > I will have a look. Regards, Wanpeng Li > > kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu > WARNING: CPU: 0 PID: 3153 at arch/x86/kvm/emulate.c:5654 > x86_emulate_insn+0xd01/0x3cf0 arch/x86/kvm/emulate.c:5654 > Kernel panic - not syncing: panic_on_warn set ... > > CPU: 0 PID: 3153 Comm: syzkaller990902 Not tainted 4.15.0-rc2+ #212 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:17 [inline] > dump_stack+0x194/0x257 lib/dump_stack.c:53 > panic+0x1e4/0x41c kernel/panic.c:183 > __warn+0x1dc/0x200 kernel/panic.c:547 > report_bug+0x211/0x2d0 lib/bug.c:184 > fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:177 > fixup_bug arch/x86/kernel/traps.c:246 [inline] > do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:295 > do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314 > invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:930 > RIP: 0010:x86_emulate_insn+0xd01/0x3cf0 arch/x86/kvm/emulate.c:5654 > RSP: 0018:ffff8801c56f7300 EFLAGS: 00010293 > RAX: ffff8801c62d2080 RBX: 1ffff10038adee69 RCX: ffffffff81154231 > RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffff8801c55da888 > RBP: ffff8801c56f7410 R08: ffff8801c55d8040 R09: ffffffff85224dc0 > R10: 0000000000000002 R11: ffffed0038abb551 R12: 00000000000000ff > R13: ffff8801c55da860 R14: 0000000000000002 R15: ffff8801c55da983 > x86_emulate_instruction+0x411/0x1ad0 arch/x86/kvm/x86.c:5769 > emulate_instruction arch/x86/include/asm/kvm_host.h:1164 [inline] > handle_invalid_guest_state arch/x86/kvm/vmx.c:6606 [inline] > vmx_handle_exit+0x6e3/0x1ce0 arch/x86/kvm/vmx.c:8826 > vcpu_enter_guest arch/x86/kvm/x86.c:7082 [inline] > vcpu_run arch/x86/kvm/x86.c:7144 [inline] > kvm_arch_vcpu_ioctl_run+0x1cb4/0x5c60 arch/x86/kvm/x86.c:7312 > 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: 0033:0x4402e9 > RSP: 002b:00007ffde2bdf2c8 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004402e9 > RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 > RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401c50 > R13: 0000000000401ce0 R14: 0000000000000000 R15: 0000000000000000 > > Dumping ftrace buffer: > (ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds.. >
