[Bug 91467] New: SIGSEGV "get_fb: failed to add fb" / sna_block_handler

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91467

            Bug ID: 91467
           Summary: SIGSEGV "get_fb: failed to add fb" / sna_block_handler
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: andreas.reis at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 117383
  --> https://bugs.freedesktop.org/attachment.cgi?id=117383&action=edit
Xorg.0.log including compton+mpv config

Seemingly random crash when resizing a h.264 (8-bit) mpv video. Can't seem to
reproduce it:

[   595.155] (EE) intel(0): get_fb: failed to add fb: 1920x1080 depth=24,
bpp=32, pitch=7680: 22
[   595.155] (II) intel(0): switch to mode 1920x1080 at 60.0 on HDMI2 using pipe
0, position (0, 0), rotation normal, reflection none
[   595.155] (EE) intel(0): get_fb: failed to add fb: 1920x1080 depth=24,
bpp=32, pitch=7680: 22
[   596.930] (EE) 
[   596.930] (EE) Backtrace:
[   596.934] (EE) 0: /usr/bin/xorg-server/Xorg (OsSigHandler+0x29) [0x5f1619]
[   596.934] (EE) 1: /usr/lib/libc.so.6 (killpg+0x40) [0x7fe4711bc5ef]
[   596.935] (EE) 2: /usr/lib/xorg/modules/drivers/intel_drv.so
(sna_block_handler+0x72) [0x7fe46b3c6e22]
[   596.935] (EE) 3: /usr/bin/xorg-server/Xorg (BlockHandler+0x4a) [0x4401fa]
[   596.935] (EE) 4: /usr/bin/xorg-server/Xorg (WaitForSomething+0x265)
[0x5e7bd5]
[   596.935] (EE) 5: /usr/bin/xorg-server/Xorg (Dispatch+0x8e) [0x43984e]
[   596.935] (EE) 6: /usr/bin/xorg-server/Xorg (dix_main+0x3d4) [0x43f784]
[   596.935] (EE) 7: /usr/lib/libc.so.6 (__libc_start_main+0xf0)
[0x7fe4711a9790]
[   596.935] (EE) 8: /usr/bin/xorg-server/Xorg (_start+0x29) [0x4246e9]

xserver / video-intel / mesa / compton / drm-intel-nightly (ie, 4.2-rc3) / mpv
(lastest git)

Haswell 4770, one 1080p monitor on HDMI2

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