mailmap: avoid out-of-bounds memory access

diff --git a/builtin/diff.c b/builtin/diff.c
index ac2b1cc63f8dcc655c353032f94b06c7c273f7a2..9650be2c50e6f79dbe033fae39f490d49c6318da 100644 (file)
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -289,6 +289,10 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        /* Otherwise, we are doing the usual "git" diff */
        rev.diffopt.skip_stat_unmatch = !!diff_auto_refresh_index;
 
+       /* Scale to real terminal size and respect statGraphWidth config */
+       rev.diffopt.stat_width = -1;
+       rev.diffopt.stat_graph_width = -1;
+
        /* Default to let external and textconv be used */
        DIFF_OPT_SET(&rev.diffopt, ALLOW_EXTERNAL);
        DIFF_OPT_SET(&rev.diffopt, ALLOW_TEXTCONV);
@@ -298,19 +302,12 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        argc = setup_revisions(argc, argv, &rev, NULL);
        if (!rev.diffopt.output_format) {
                rev.diffopt.output_format = DIFF_FORMAT_PATCH;
-               if (diff_setup_done(&rev.diffopt) < 0)
-                       die(_("diff_setup_done failed"));
+               diff_setup_done(&rev.diffopt);
        }
 
        DIFF_OPT_SET(&rev.diffopt, RECURSIVE);
 
-       /*
-        * If the user asked for our exit code then don't start a
-        * pager or we would end up reporting its exit code instead.
-        */
-       if (!DIFF_OPT_TST(&rev.diffopt, EXIT_WITH_STATUS) &&
-           check_pager_config("diff") != 0)
-               setup_pager();
+       setup_diff_pager(&rev.diffopt);
 
        /*
         * Do we have --cached and not have a pending object, then
@@ -327,7 +324,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                                add_head_to_pending(&rev);
                                if (!rev.pending.nr) {
                                        struct tree *tree;
-                                       tree = lookup_tree((const unsigned char*)EMPTY_TREE_SHA1_BIN);
+                                       tree = lookup_tree(EMPTY_TREE_SHA1_BIN);
                                        add_pending_object(&rev, &tree->object, "HEAD");
                                }
                                break;
@@ -421,3 +418,19 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                refresh_index_quietly();
        return result;
 }
+
+void setup_diff_pager(struct diff_options *opt)
+{
+       /*
+        * If the user asked for our exit code, then either they want --quiet
+        * or --exit-code. We should definitely not bother with a pager in the
+        * former case, as we will generate no output. Since we still properly
+        * report our exit code even when a pager is run, we _could_ run a
+        * pager with --exit-code. But since we have not done so historically,
+        * and because it is easy to find people oneline advising "git diff
+        * --exit-code" in hooks and other scripts, we do not do so.
+        */
+       if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) &&
+           check_pager_config("diff") != 0)
+               setup_pager();
+}