diff options
| -rw-r--r-- | lib/fstree/xattr.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/lib/fstree/xattr.c b/lib/fstree/xattr.c index cc84cea..38f7703 100644 --- a/lib/fstree/xattr.c +++ b/lib/fstree/xattr.c @@ -23,8 +23,16 @@ static void remove_from_list(fstree_t *fs, tree_xattr_t *xattr) static tree_xattr_t *grow_xattr_block(tree_xattr_t *xattr) { - size_t count = (xattr == NULL) ? 4 : (xattr->max_attr * 2); - void *new = realloc(xattr, sizeof(*xattr) + sizeof(uint64_t) * count); + size_t new_size, old_size = 0, new_count = 4; + void *new; + + if (xattr != NULL) { + new_count = xattr->max_attr * 2; + old_size = sizeof(*xattr) + sizeof(uint64_t) * xattr->max_attr; + } + + new_size = sizeof(*xattr) + sizeof(uint64_t) * new_count; + new = realloc(xattr, new_size); if (new == NULL) { perror("adding extended attributes"); @@ -32,8 +40,10 @@ static tree_xattr_t *grow_xattr_block(tree_xattr_t *xattr) return NULL; } + memset((char *)new + old_size, 0, new_size - old_size); + xattr = new; - xattr->max_attr = count; + xattr->max_attr = new_count; return xattr; } |