nx-match: Avoid null pointer dereference in nx_pull_header__() error …

…case. Found by LLVM scan-build. Reported-by: Kevin Lo <[email protected]> Signed-off-by: Ben Pfaff <[email protected]> Acked-by: Jarno Rajahalme <[email protected]>
huiweics · Apr 17, 2015 · 38221f4 · 38221f4
1 parent 255a54e
commit 38221f4
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/lib/nx-match.c b/lib/nx-match.c
@@ -319,7 +319,9 @@ nx_pull_header__(struct ofpbuf *b, bool allow_cookie, uint64_t *header,
                 b->size);
 error:
     *header = 0;
-    *field = NULL;
+    if (field) {
+        *field = NULL;
+    }
     return OFPERR_OFPBMC_BAD_LEN;
 }