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loader: fix close on uninitialized file descriptor value

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Using a drm syscall layer faking a kernel driver :

  ==581460== Conditional jump or move depends on uninitialised value(s)
  ==581460==    by 0x48A4C2B: close (drm-hooks.cpp:185)
  ==581460==    by 0x5A815F1: dri3_alloc_render_buffer (loader_dri3_helper.c:1469)
  ==581460==    by 0x5A82050: dri3_get_buffer (loader_dri3_helper.c:1827)
  ==581460==    by 0x5A82662: loader_dri3_get_buffers (loader_dri3_helper.c:2028)
  ==581460==    by 0x6C78109: intel_update_image_buffers (brw_context.c:1870)
  ==581460==    by 0x6C77805: intel_update_renderbuffers (brw_context.c:1499)
  ==581460==    by 0x6C7789D: intel_prepare_render (brw_context.c:1520)
  ==581460==    by 0x6C773D4: intelMakeCurrent (brw_context.c:1341)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 069fdd5f9f ("egl/x11: Support DRI3 v1.1")
Reviewed-by: Eric Anholt <eric@anholt.net>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3152>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3152>
This commit is contained in:
Lionel Landwerlin
2019-12-18 17:48:26 +02:00
parent 648cc22afb
commit fc2552b644
1 changed files with 4 additions and 1 deletions
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src/loader/loader_dri3_helper.c
+4 -1
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@@ -1394,6 +1394,8 @@ dri3_alloc_render_buffer(struct loader_dri3_drawable *draw, unsigned int format,
image = pixmap_buffer;
}
buffer_fds[i] = -1;
ret = draw->ext->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD,
&buffer_fds[i]);
ret &= draw->ext->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE,
@@ -1466,7 +1468,8 @@ dri3_alloc_render_buffer(struct loader_dri3_drawable *draw, unsigned int format,
no_buffer_attrib:
do {
close(buffer_fds[i]);
if (buffer_fds[i] != -1)
close(buffer_fds[i]);
} while (--i >= 0);
draw->ext->image->destroyImage(pixmap_buffer);
no_linear_buffer: