Author: cem
Date: Wed Apr 20 03:45:45 2016
New Revision: 298334
URL: https://svnweb.freebsd.org/changeset/base/298334
Log:
drm2(4): Fix double-free in low-memory error path
Reallocf frees 'block'; don't attempt to free it again.
Reported by: Coverity
CID: 1091165
Sponsored by: EMC / Isilon Storage Division
Modified:
head/sys/dev/drm2/drm_edid.c
Modified: head/sys/dev/drm2/drm_edid.c
==============================================================================
--- head/sys/dev/drm2/drm_edid.c Wed Apr 20 03:24:59 2016
(r298333)
+++ head/sys/dev/drm2/drm_edid.c Wed Apr 20 03:45:45 2016
(r298334)
@@ -353,8 +353,10 @@ drm_do_get_edid(struct drm_connector *co
new = reallocf(block, (block[0x7e] + 1) * EDID_LENGTH, DRM_MEM_KMS,
M_NOWAIT);
- if (!new)
+ if (!new) {
+ block = NULL;
goto out;
+ }
block = new;
for (j = 1; j <= block[0x7e]; j++) {
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