Bug 95246

Summary:	Segfault in glBindFramebuffer()
Product:	Mesa	Reporter:	Daniel Scharrer <daniel>
Component:	Mesa core	Assignee:	mesa-dev
Status:	RESOLVED FIXED	QA Contact:	mesa-dev
Severity:	normal
Priority:	medium
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Daniel Scharrer 2016-05-03 02:35:44 UTC

I've found a reproducible segfault when binding a framebuffer. It crashes in the last call in this apitrace for me:

 http://constexpr.org/tmp/shadows.trace (105 KiB)

I wouldn't be surprised if this contains invalid calls (nothing detected by Mesa though), but it still shouldn't crash. Haven't tried this on any other drivers yet.

GPU: AMD R9 380X
Mesa 11.3.0-devel (git-750c38f)

Comment 1 Daniel Scharrer 2016-05-03 02:36:26 UTC

Backtrace:

#0  driver_RenderTexture_is_safe (att=att@entry=0xb33570)
    at /var/tmp/portage/media-libs/mesa-9999/work/mesa-9999/src/mesa/main/fbobject.c:392
#1  0x00007ffff29aabc3 in check_begin_texture_render (fb=0xb33300, ctx=0xa9fdb0)
    at /var/tmp/portage/media-libs/mesa-9999/work/mesa-9999/src/mesa/main/fbobject.c:2443
#2  _mesa_bind_framebuffers (ctx=0xa9fdb0, newDrawFb=0xb33300, newReadFb=0xb33300)
    at /var/tmp/portage/media-libs/mesa-9999/work/mesa-9999/src/mesa/main/fbobject.c:2579
#3  0x00000000005773f6 in retrace_glBindFramebuffer (call=...)
[...]

Comment 2 Marek Olšák 2016-05-30 14:31:15 UTC

Fix: https://lists.freedesktop.org/archives/mesa-dev/2016-May/118763.html

Comment 3 Daniel Scharrer 2016-06-13 12:46:19 UTC

Looks like the fix has been pushed, thanks.

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