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authorMarc-André Lureau <marcandre.lureau@redhat.com>2017-04-06 14:05:13 +0200
committerGerd Hoffmann <kraxel@redhat.com>2017-04-07 12:31:46 +0200
commita703d3aef5991b72a5a45880e7491232b8032f09 (patch)
tree2a11768e07134d89f31545365899254b3db0ef0e /hw/display/qxl.c
parent5fe2339e6b09da7d6f48b9bef0f1a7360392b489 (diff)
qxl: switch display on entering VGA
Since commit cd958edb1fae85d, same size console resize is skipped. This change broke QXL incoming migration in VGA mode, qemu_spice_display_switch() is no longer called during qxl_post_load(), because default message surface is of the same size, and during displaychangelistener registration, PCIQXLDevice.mode is QXL_MODE_UNDEFINED. This triggers a later crash on refresh: ==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) One way to solve this is to explicitely call qemu_spice_display_switch() on entering VGA mode, which is called during qxl_post_load(). Fixes: "null pointer access on migration resume of systemrescuecd boot menu with qxl-vga" https://bugs.launchpad.net/qemu/+bug/1679126 https://bugzilla.redhat.com/show_bug.cgi?id=1438566 Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-id: 20170406120513.638-4-marcandre.lureau@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/display/qxl.c')
-rw-r--r--hw/display/qxl.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index 0d02f0efe6..c31b293bb7 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -1146,6 +1146,7 @@ static void qxl_enter_vga_mode(PCIQXLDevice *d)
update_displaychangelistener(&d->ssd.dcl, GUI_REFRESH_INTERVAL_DEFAULT);
qemu_spice_create_host_primary(&d->ssd);
d->mode = QXL_MODE_VGA;
+ qemu_spice_display_switch(&d->ssd, d->ssd.ds);
vga_dirty_log_start(&d->vga);
graphic_hw_update(d->vga.con);
}