diff options
Diffstat (limited to 'results/classifier/gemma3:12b/device/1679126')
| -rw-r--r-- | results/classifier/gemma3:12b/device/1679126 | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/results/classifier/gemma3:12b/device/1679126 b/results/classifier/gemma3:12b/device/1679126 new file mode 100644 index 000000000..6bacb2ed6 --- /dev/null +++ b/results/classifier/gemma3:12b/device/1679126 @@ -0,0 +1,39 @@ + +null pointer access on migration resume of systemrescuecd boot menu with qxl-vga + +With qemu-2.8.0 up to 2.9.0-rc2 and git master (6954cdc), when resuming from a migration state file created from a VM suspended while showing the System Rescue CD 4.9.2 boot menu and using the QXL VGA device, I get a null point access in pixman_image_get_data called from qemu_spice_create_update (spice-display.c:215). When I added assert(ssd->mirror != NULL) above that line, assert failed. I don't get the crash when using standard VGA or cirrus-vga. I am using gcc-4.9.3 on Gentoo x86_64 with Intel i7-4700HQ CPU and kernel: 4.9.15-gentoo. + +Here is the valgrind trace from the git version: +==2634== Thread 1: +==2634== Invalid read of size 4 +==3516== at 0x65F3050: pixman_image_get_data (in /usr/lib64/libpixman-1.so.0.34.0) +==3516== by 0x6F0CEB: qemu_spice_create_update (spice-display.c:215) +==3516== by 0x6F1CC7: qemu_spice_display_refresh (spice-display.c:502) +==3516== by 0x58CF77: display_refresh (qxl.c:1948) +==3516== by 0x6E8084: do_safe_dpy_refresh (console.c:1591) +==3516== by 0x6E80D5: dpy_refresh (console.c:1604) +==3516== by 0x6E4508: gui_update (console.c:201) +==3516== by 0x81898E: timerlist_run_timers (qemu-timer.c:536) +==3516== by 0x8189D6: qemu_clock_run_timers (qemu-timer.c:547) +==3516== by 0x818D98: qemu_clock_run_all_timers (qemu-timer.c:662) +==3516== by 0x81952A: main_loop_wait (main-loop.c:514) +==3516== by 0x4ADD29: main_loop (vl.c:1898) + +Minimal steps to reproduce: + +Compile (debug compile flags are just so valgrind works, the crash occurs with non-debug compile flags as well): +CFLAGS="-g -O0" CXXFLAGS="-g -O0" ./configure --target-list=i386-softmmu,x86_64-softmmu +./configure +make + +Start VM and leave it on the System Rescue CD graphical boot menu: +x86_64-softmmu/qemu-system-x86_64 -nodefaults -machine pc -drive file=systemrescuecd-x86-4.9.2.iso,if=none,id=cdrom-cd,readonly=on -device ide-cd,bus=ide.0,drive=cdrom-cd,bootindex=1 -device qxl-vga -monitor unix:monitor.sock,server,nowait -display gtk + +Suspend VM and save state: +socat - unix:monitor.sock + stop + migrate "exec:cat > vm.state" + quit + +Attempt to resume VM (but this crashes): +x86_64-softmmu/qemu-system-x86_64 -nodefaults -machine pc -drive file=systemrescuecd-x86-4.9.2.iso,if=none,id=cdrom-cd,readonly=on -device ide-cd,bus=ide.0,drive=cdrom-cd,bootindex=1 -device qxl-vga -monitor unix:monitor.sock,server,nowait -display gtk -incoming exec:"cat vm.state" \ No newline at end of file |