2017-12-06 4:07 GMT+08:00 syzbot <bot+75375385991b4f8c599704a10849863c586ea284@xxxxxxxxxxxxxxxxxxxxxxxxx>: > Hello, > > syzkaller hit the following crash on > fb20eb9d798d2f4c1a75b7fe981d72dfa8d7270d > 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. > > syzkaller reproducer is attached. See https://goo.gl/kgGztJ > for information about syzkaller reproducers > Is there a c program to reproduce? Regards, Wanpeng Li > > kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu > WARNING: CPU: 1 PID: 3526 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: 1 PID: 3526 Comm: syz-executor4 Not tainted 4.15.0-rc1-next-20171201+ > #57 > 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+0x22/0x40 arch/x86/entry/entry_64.S:1066 > RIP: 0010:x86_emulate_insn+0xd01/0x3cf0 arch/x86/kvm/emulate.c:5654 > RSP: 0018:ffff8801d0fff3e8 EFLAGS: 00010293 > RAX: ffff8801d17b60c0 RBX: 1ffff1003a1ffe86 RCX: ffffffff81154351 > RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffff8801d0b5b5c8 > RBP: ffff8801d0fff4f8 R08: ffff8801d0b58d80 R09: ffffffff85224da0 > R10: 0000000000000001 R11: ffffed003a16b6d4 R12: 00000000000000ff > R13: ffff8801d0b5b5a0 R14: 0000000000000002 R15: ffff8801d0b5b6c3 > x86_emulate_instruction+0x411/0x1ad0 arch/x86/kvm/x86.c:5771 > emulate_instruction arch/x86/include/asm/kvm_host.h:1164 [inline] > complete_emulated_io arch/x86/kvm/x86.c:7190 [inline] > complete_emulated_pio+0xdd/0x1b0 arch/x86/kvm/x86.c:7201 > kvm_arch_vcpu_ioctl_run+0x2db2/0x5c60 arch/x86/kvm/x86.c:7305 > 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:00007f6b6b2d5c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 00000000004529d9 > RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000004 > RBP: 000000000000039b R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2728 > R13: 00000000ffffffff R14: 00007f6b6b2d66d4 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 > If you want to test a patch for this bug, please reply with: > #syz test: git://repo/address.git branch > and provide the patch inline or as an attachment. > 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.
