From 4867f1184c943f7738bb7b42cab2e62cf16cdb18 Mon Sep 17 00:00:00 2001
From: Patrick Steinhardt <ps@pks.im>
Date: Tue, 23 Feb 2016 12:59:17 +0100
Subject: [PATCH] xdiff/xmerge: fix memory leak in xdl_merge
When building the script for the second file that is to be merged
we have already allocated memory for data structures related to
the first file. When we encounter an error in building the second
script we only free allocated memory related to the second file
before erroring out.
Fix this memory leak by also releasing allocated memory related
to the first file.
Helped-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
xdiff/xmerge.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/xdiff/xmerge.c b/xdiff/xmerge.c
index 625198e0585..e272424cfba 100644
--- a/xdiff/xmerge.c
+++ b/xdiff/xmerge.c
@@ -579,8 +579,11 @@ int xdl_merge(mmfile_t *orig, mmfile_t *mf1, mmfile_t *mf2,
result->ptr = NULL;
result->size = 0;
- if (xdl_do_diff(orig, mf1, xpp, &xe1) < 0 ||
- xdl_do_diff(orig, mf2, xpp, &xe2) < 0) {
+ if (xdl_do_diff(orig, mf1, xpp, &xe1) < 0) {
+ return -1;
+ }
+ if (xdl_do_diff(orig, mf2, xpp, &xe2) < 0) {
+ xdl_free_env(&xe1);
return -1;
}
if (xdl_change_compact(&xe1.xdf1, &xe1.xdf2, xpp->flags) < 0 ||
@@ -592,6 +595,8 @@ int xdl_merge(mmfile_t *orig, mmfile_t *mf1, mmfile_t *mf2,
if (xdl_change_compact(&xe2.xdf1, &xe2.xdf2, xpp->flags) < 0 ||
xdl_change_compact(&xe2.xdf2, &xe2.xdf1, xpp->flags) < 0 ||
xdl_build_script(&xe2, &xscr2) < 0) {
+ xdl_free_script(xscr1);
+ xdl_free_env(&xe1);
xdl_free_env(&xe2);
return -1;
}