From 0fb1eaa8850557249a8d1c43a4f0f3ac5a5f75ce Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Mon, 4 Dec 2006 02:11:39 -0800 Subject: [PATCH] unpack-trees: make sure "df_conflict_entry.name" is NUL terminated. The structure that ends with a flexible array member (or 0 length array with older GCC) "char name[FLEX_ARRAY]" is allocated on the stack and we use it after clearing its entire size with memset. That does not guarantee that "name" is properly NUL terminated as we intended on platforms with more forgiving structure alignment requirements. Reported breakage on m68k by Roman Zippel. Signed-off-by: Junio C Hamano --- unpack-trees.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/unpack-trees.c b/unpack-trees.c index 7cfd628d8e..47aa804a86 100644 --- a/unpack-trees.c +++ b/unpack-trees.c @@ -370,7 +370,7 @@ int unpack_trees(struct object_list *trees, struct unpack_trees_options *o) int i; struct object_list *posn = trees; struct tree_entry_list df_conflict_list; - struct cache_entry df_conflict_entry; + static struct cache_entry *dfc; memset(&df_conflict_list, 0, sizeof(df_conflict_list)); df_conflict_list.next = &df_conflict_list; @@ -381,8 +381,10 @@ int unpack_trees(struct object_list *trees, struct unpack_trees_options *o) state.refresh_cache = 1; o->merge_size = len; - memset(&df_conflict_entry, 0, sizeof(df_conflict_entry)); - o->df_conflict_entry = &df_conflict_entry; + + if (!dfc) + dfc = xcalloc(1, sizeof(struct cache_entry) + 1); + o->df_conflict_entry = dfc; if (len) { posns = xmalloc(len * sizeof(struct tree_entry_list *));