refs can be used with uninitialized data if btrfs_lookup_extent_info() fails on the first pass through the loop. In the original code if that happens then check_path_shared() probably returns 1, but with this patch it will continue through the loop. I'm not super familiar with this code so please look it over carefully. Signed-off-by: Dan Carpenter <error27@xxxxxxxxx> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index fa6ccc1..9640dae 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -2673,7 +2673,7 @@ static int check_path_shared(struct btrfs_root *root, struct extent_buffer *eb; int level; int ret; - u64 refs; + u64 refs = 0; for (level = 0; level < BTRFS_MAX_LEVEL; level++) { if (!path->nodes[level]) -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html