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Fix an accessing freed memory bug in btrfsck

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This commit is contained in:
Yan Zheng 2009-01-09 14:39:33 -05:00 committed by Chris Mason
parent b8271dc67e
commit 4f0347004e
1 changed files with 7 additions and 5 deletions
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12
btrfsck.c
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@ -473,6 +473,7 @@ static int merge_inode_recs(struct inode_record *src, struct inode_record *dst,
}
}
dst->errors |= src->errors;
if (src->found_inode_item) {
if (!dst->found_inode_item) {
dst->nlink = src->nlink;
@ -480,7 +481,6 @@ static int merge_inode_recs(struct inode_record *src, struct inode_record *dst,
dst->nbytes = src->nbytes;
dst->imode = src->imode;
dst->nodatasum = src->nodatasum;
dst->errors |= src->errors;
dst->found_inode_item = 1;
} else {
dst->errors |= I_ERR_DUP_INODE_ITEM;
@ -503,11 +503,14 @@ static int splice_shared_node(struct shared_node *src_node,
struct ptr_node *node, *ins;
struct cache_tree *src, *dst;
struct inode_record *rec, *conflict;
u64 current_ino = 0;
int splice = 0;
int ret;
if (--src_node->refs == 0)
splice = 1;
if (src_node->current)
current_ino = src_node->current->ino;
src = &src_node->inode_cache;
dst = &dst_node->inode_cache;
@ -537,14 +540,13 @@ static int splice_shared_node(struct shared_node *src_node,
BUG_ON(ret);
}
}
if (src_node->current && (!dst_node->current ||
src_node->current->ino > dst_node->current->ino)) {
if (current_ino > 0 && (!dst_node->current ||
current_ino > dst_node->current->ino)) {
if (dst_node->current) {
dst_node->current->checked = 1;
maybe_free_inode_rec(dst, dst_node->current);
}
dst_node->current =
get_inode_rec(dst, src_node->current->ino, 1);
dst_node->current = get_inode_rec(dst, current_ino, 1);
}
return 0;
}