From: Robert Ellison <papillo@vmware.com>
Date: Fri, 8 May 2009 20:40:38 +0000 (-0600)
Subject: i965: fix segfault on low memory conditions
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e15aebe10e20aacce63175b68ec8daa5c1dc4e0c;p=mesa.git

i965: fix segfault on low memory conditions

When out of memory (in at least one case, triggered by a longrunning
memory leak), this code will segfault and crash.  By checking for the
out-of-memory condition, the system can continue, and will report
the out-of-memory error later, a much preferable outcome.
(cherry picked from commit 44a4abfd4f8695809eaec07df8eeb191d6e017d7)
---

diff --git a/src/mesa/drivers/dri/i965/brw_wm.c b/src/mesa/drivers/dri/i965/brw_wm.c
index bd296aa2a76..8a3b7df9c78 100644
--- a/src/mesa/drivers/dri/i965/brw_wm.c
+++ b/src/mesa/drivers/dri/i965/brw_wm.c
@@ -146,6 +146,13 @@ static void do_wm_prog( struct brw_context *brw,
    if (c == NULL) {
       brw->wm.compile_data = calloc(1, sizeof(*brw->wm.compile_data));
       c = brw->wm.compile_data;
+      if (c == NULL) {
+         /* Ouch - big out of memory problem.  Can't continue
+          * without triggering a segfault, no way to signal,
+          * so just return.
+          */
+         return;
+      }
    } else {
       memset(c, 0, sizeof(*brw->wm.compile_data));
    }