Package: qemu-system-x86 Version: 1:2.1+dfsg-11 Severity: important I don't know if this bug lies in qemu or in the kernel. I can reproduce it with the latest kernel from git (4.1-rc3), as well as with 3.16 (Debian package 3.16.7-ckt9-3). I can also reproduce this bug with the latest qemu from git (commit 266745cacb848d7cd0ae8889ae262e8718ace4d4).
I can reliably reproduce the following error on a Broadwell system (/proc/cpuinfo attached) with KVM acceleration enabled, when booting a self-built OVMF BIOS image with -bios. The same image works fine on other systems, or on this system with KVM acceleration disabled. KVM internal error. Suberror: 1 emulation failure RAX=00000000fffe75cc RBX=00000000fffe60e4 RCX=0000000000000402 RDX=0000000000000402 RSI=00000000fffe62c4 RDI=0000000000005042 RBP=000000000007ffd0 RSP=000000000007fd08 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=00000000fffe75cc RFL=00010046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0008 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] CS =0018 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0008 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0008 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] FS =0008 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] GS =0008 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy GDT= 00000000ffffff80 0000001f IDT= 0000000000000000 0000ffff CR0=c0000033 CR2=0000000000000000 CR3=00000000ffffe000 CR4=00000660 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000500 Code=00 00 00 48 b8 50 7c fe ff 00 00 00 00 ff d0 c9 c3 90 90 90 <9b> db e3 68 7f 03 00 00 48 8d 04 24 d9 28 58 0f 20 e0 48 0d 00 02 00 00 0f 22 e0 68 80 1f (qemu then stops emulation.) Decoding that instruction stream (either from those bytes, or via the 'x' command in the qemu console) shows (starting with the failing instruction): 0: 9b db e3 finit 3: 68 7f 03 00 00 pushq $0x37f 8: 48 8d 04 24 lea (%rsp),%rax c: d9 28 fldcw (%rax) e: 58 pop %rax f: 0f 20 e0 mov %cr4,%rax 12: 48 0d 00 02 00 00 or $0x200,%rax 18: 0f 22 e0 mov %rax,%cr4 If I disable kvm acceleration, this failure does not occur. The failure still occurs with other values for the -cpu option. Happy to collect additional information about the crash, or try with other options, to help debug this. I can also run a qemu binary under gdb and collect information that way, if that helps. - Josh Triplett -- System Information: Debian Release: stretch/sid APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 4.1.0-rc3 (SMP w/4 CPU cores) Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages qemu-system-x86 depends on: ii ipxe-qemu 1.0.0+git-20150424.a25a16d-1 ii libaio1 0.3.110-1 ii libasound2 1.0.28-1 ii libbluetooth3 5.23-2+b1 ii libbrlapi0.6 5.2~20141018-5 ii libc6 2.19-18 ii libcurl3-gnutls 7.42.1-2 ii libfdt1 1.4.0+dfsg-1 ii libgcc1 1:5.1.1-5 ii libglib2.0-0 2.44.0-2 ii libgnutls-deb0-28 3.3.15-2 ii libiscsi2 1.12.0-2 ii libjpeg62-turbo 1:1.3.1-12 ii libncurses5 5.9+20140913-1+b1 ii libpixman-1-0 0.32.6-3 ii libpng12-0 1.2.50-2+b2 ii libpulse0 6.0-2 ii librados2 0.80.9-2 ii librbd1 0.80.9-2 ii libsasl2-2 2.1.26.dfsg1-13 ii libsdl1.2debian 1.2.15-11 ii libseccomp2 2.1.1-1 ii libspice-server1 0.12.5-1+b1 ii libssh2-1 1.5.0-2+b1 ii libtinfo5 5.9+20140913-1+b1 ii libusb-1.0-0 2:1.0.19-1 ii libusbredirparser1 0.7-1 ii libuuid1 2.26.2-2 ii libvdeplug2 2.3.2+r586-2 ii libx11-6 2:1.6.3-1 ii libxen-4.4 4.4.1-9 ii libxenstore3.0 4.4.1-9 ii qemu-system-common 1:2.1+dfsg-11 ii seabios 1.8.1-2 ii zlib1g 1:1.2.8.dfsg-2+b1 Versions of packages qemu-system-x86 recommends: ii qemu-utils 1:2.1+dfsg-11 Versions of packages qemu-system-x86 suggests: ii kmod 20-1 pn ovmf <none> pn samba <none> pn sgabios <none> pn vde2 <none> -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
