Fix buffer overflow in git diff
If PATH_MAX on your system is smaller than a path stored, it may cause
buffer overflow and stack corruption in diff_addremove() and diff_change()
functions when running git-diff
Signed-off-by: Dmitry Potapov <dpotapov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/diff-lib.c b/diff-lib.c
index b17722d..e7eaff9 100644
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -171,7 +171,7 @@
if (silent_on_removed)
continue;
diff_addremove(&revs->diffopt, '-', ce->ce_mode,
- ce->sha1, ce->name, NULL);
+ ce->sha1, ce->name);
continue;
}
changed = ce_match_stat(ce, &st, ce_option);
@@ -184,7 +184,7 @@
newmode = ce_mode_from_stat(ce, st.st_mode);
diff_change(&revs->diffopt, oldmode, newmode,
ce->sha1, (changed ? null_sha1 : ce->sha1),
- ce->name, NULL);
+ ce->name);
}
diffcore_std(&revs->diffopt);
@@ -208,7 +208,7 @@
const unsigned char *sha1, unsigned int mode)
{
diff_addremove(&revs->diffopt, prefix[0], mode,
- sha1, ce->name, NULL);
+ sha1, ce->name);
}
static int get_stat_data(struct cache_entry *ce,
@@ -312,7 +312,7 @@
return 0;
diff_change(&revs->diffopt, oldmode, mode,
- old->sha1, sha1, old->name, NULL);
+ old->sha1, sha1, old->name);
return 0;
}
