2018-02-06 16:30 GMT+08:00 syzbot <syzbot+c1d9517cab094dae65e446c0c5b4de6c40f4dc58@xxxxxxxxxxxxxxxxxxxxxxxxx>: > syzbot has found reproducer for the following crash on upstream commit > 2deb41b245320f0eefb535a5c8ea19ed66b33c04 (Mon Feb 5 18:07:40 2018 +0000) > Merge tag 'rproc-v4.16' of git://github.com/andersson/remoteproc > > So far this crash happened 234 times on linux-next, mmots, upstream. > C reproducer is attached. > syzkaller reproducer is attached. > Raw console output is attached. > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: > syzbot+c1d9517cab094dae65e446c0c5b4de6c40f4dc58@xxxxxxxxxxxxxxxxxxxxxxxxx > It will help syzbot understand when the bug is fixed. > > WARNING: CPU: 0 PID: 4187 at arch/x86/kvm/vmx.c:6771 > handle_ept_misconfig+0x140/0x520 arch/x86/kvm/vmx.c:6771 > Kernel panic - not syncing: panic_on_warn set ... I can reproduce, will have a look. Regards, Wanpeng Li > > CPU: 0 PID: 4187 Comm: syzkaller225100 Not tainted 4.15.0+ #298 > 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:178 > fixup_bug arch/x86/kernel/traps.c:247 [inline] > do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 > do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 > invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:984 > RIP: 0010:handle_ept_misconfig+0x140/0x520 arch/x86/kvm/vmx.c:6771 > RSP: 0018:ffff8801b2807360 EFLAGS: 00010293 > RAX: ffff8801b2a16740 RBX: 1ffff10036500e6e RCX: ffffffff81193de0 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffed0036500e58 > RBP: ffff8801b2807438 R08: 0000000000000007 R09: ffff8801b28071d8 > R10: ffff8801b2806f30 R11: 0000000000000002 R12: ffff8801c5618480 > R13: 00000000fffffff2 R14: ffff8801b2807410 R15: dffffc0000000000 > vmx_handle_exit+0x25d/0x1ce0 arch/x86/kvm/vmx.c:8955 > vcpu_enter_guest arch/x86/kvm/x86.c:7083 [inline] > vcpu_run arch/x86/kvm/x86.c:7145 [inline] > kvm_arch_vcpu_ioctl_run+0x1c69/0x5bf0 arch/x86/kvm/x86.c:7312 > kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2564 > vfs_ioctl fs/ioctl.c:46 [inline] > do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686 > SYSC_ioctl fs/ioctl.c:701 [inline] > SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 > do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287 > entry_SYSCALL_64_after_hwframe+0x26/0x9b > RIP: 0033:0x448a79 > RSP: 002b:00007ff13702fda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00000000006ddc3c RCX: 0000000000448a79 > RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000011b > RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc38 > R13: 6d766b2f7665642f R14: 00007ff1370309c0 R15: 000000000000000d > > Dumping ftrace buffer: > (ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds.. >
