Sync with 2.3.10

4 files changed, 17 insertions, 8 deletions

diff --git a/builtin/blame.c b/builtin/blame.c
index b3e948e757..048ed53c2f 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -973,7 +973,10 @@ static void pass_blame_to_parent(struct scoreboard *sb,
 	fill_origin_blob(&sb->revs->diffopt, target, &file_o);
 	num_get_patch++;
 
-	diff_hunks(&file_p, &file_o, 0, blame_chunk_cb, &d);
+	if (diff_hunks(&file_p, &file_o, 0, blame_chunk_cb, &d))
+		die("unable to generate diff (%s -> %s)",
+		    sha1_to_hex(parent->commit->object.sha1),
+		    sha1_to_hex(target->commit->object.sha1));
 	/* The rest are the same as the parent */
 	blame_chunk(&d.dstq, &d.srcq, INT_MAX, d.offset, INT_MAX, parent);
 	*d.dstq = NULL;
@@ -1119,7 +1122,9 @@ static void find_copy_in_blob(struct scoreboard *sb,
 	 * file_p partially may match that image.
 	 */
 	memset(split, 0, sizeof(struct blame_entry [3]));
-	diff_hunks(file_p, &file_o, 1, handle_split_cb, &d);
+	if (diff_hunks(file_p, &file_o, 1, handle_split_cb, &d))
+		die("unable to generate diff (%s)",
+		    sha1_to_hex(parent->commit->object.sha1));
 	/* remainder, if any, all match the preimage */
 	handle_split(sb, ent, d.tlno, d.plno, ent->num_lines, parent, split);
 }
diff --git a/builtin/merge-file.c b/builtin/merge-file.c
index ea8093f676..50d0bc873b 100644
--- a/builtin/merge-file.c
+++ b/builtin/merge-file.c
@@ -75,7 +75,8 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
 			names[i] = argv[i];
 		if (read_mmfile(mmfs + i, fname))
 			return -1;
-		if (buffer_is_binary(mmfs[i].ptr, mmfs[i].size))
+		if (mmfs[i].size > MAX_XDIFF_SIZE ||
+		    buffer_is_binary(mmfs[i].ptr, mmfs[i].size))
 			return error("Cannot merge binary files: %s",
 					argv[i]);
 	}
diff --git a/builtin/merge-tree.c b/builtin/merge-tree.c
index f9ab48597e..2a4aafec6a 100644
--- a/builtin/merge-tree.c
+++ b/builtin/merge-tree.c
@@ -118,7 +118,8 @@ static void show_diff(struct merge_list *entry)
 	if (!dst.ptr)
 		size = 0;
 	dst.size = size;
-	xdi_diff(&src, &dst, &xpp, &xecfg, &ecb);
+	if (xdi_diff(&src, &dst, &xpp, &xecfg, &ecb))
+		die("unable to generate diff");
 	free(src.ptr);
 	free(dst.ptr);
 }
diff --git a/builtin/rerere.c b/builtin/rerere.c
index 7afadd2ead..be55e0d2a7 100644
--- a/builtin/rerere.c
+++ b/builtin/rerere.c
@@ -29,9 +29,10 @@ static int diff_two(const char *file1, const char *label1,
 	xdemitconf_t xecfg;
 	xdemitcb_t ecb;
 	mmfile_t minus, plus;
+	int ret;
 
 	if (read_mmfile(&minus, file1) || read_mmfile(&plus, file2))
-		return 1;
+		return -1;
 
 	printf("--- a/%s\n+++ b/%s\n", label1, label2);
 	fflush(stdout);
@@ -40,11 +41,11 @@ static int diff_two(const char *file1, const char *label1,
 	memset(&xecfg, 0, sizeof(xecfg));
 	xecfg.ctxlen = 3;
 	ecb.outf = outf;
-	xdi_diff(&minus, &plus, &xpp, &xecfg, &ecb);
+	ret = xdi_diff(&minus, &plus, &xpp, &xecfg, &ecb);
 
 	free(minus.ptr);
 	free(plus.ptr);
-	return 0;
+	return ret;
 }
 
 int cmd_rerere(int argc, const char **argv, const char *prefix)
@@ -104,7 +105,8 @@ int cmd_rerere(int argc, const char **argv, const char *prefix)
 		for (i = 0; i < merge_rr.nr; i++) {
 			const char *path = merge_rr.items[i].string;
 			const char *name = (const char *)merge_rr.items[i].util;
-			diff_two(rerere_path(name, "preimage"), path, path, path);
+			if (diff_two(rerere_path(name, "preimage"), path, path, path))
+				die("unable to generate diff for %s", name);
 		}
 	else
 		usage_with_options(rerere_usage, options);