diff options
| author |   Josef Bacik <josef@toxicpanda.com> | 2021-05-19 13:13:15 -0400 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-10 13:37:13 +0200 |
| commit | 6d4da27bd9efdbdffbaf6aa12617a2b549a3b752 (patch) | |
| tree | 15782bce5dfbf76de67a407895783f3727656da6 | |
| parent | btrfs: return errors from btrfs_del_csums in cleanup_ref_head (diff) | |
| download | wireguard-linux-6d4da27bd9efdbdffbaf6aa12617a2b549a3b752.tar.xz wireguard-linux-6d4da27bd9efdbdffbaf6aa12617a2b549a3b752.zip | |
btrfs: fixup error handling in fixup_inode_link_counts
commit 011b28acf940eb61c000059dd9e2cfcbf52ed96b upstream.
This function has the following pattern
while (1) {
ret = whatever();
if (ret)
goto out;
}
ret = 0
out:
return ret;
However several places in this while loop we simply break; when there's
a problem, thus clearing the return value, and in one case we do a
return -EIO, and leak the memory for the path.
Fix this by re-arranging the loop to deal with ret == 1 coming from
btrfs_search_slot, and then simply delete the
ret = 0;
out:
bit so everybody can break if there is an error, which will allow for
proper error handling to occur.
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/btrfs/tree-log.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 54647eb9c6ed..4ff381c23cef 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -1775,6 +1775,7 @@ static noinline int fixup_inode_link_counts(struct btrfs_trans_handle *trans, break; if (ret == 1) { + ret = 0; if (path->slots[0] == 0) break; path->slots[0]--; @@ -1787,17 +1788,19 @@ static noinline int fixup_inode_link_counts(struct btrfs_trans_handle *trans, ret = btrfs_del_item(trans, root, path); if (ret) - goto out; + break; btrfs_release_path(path); inode = read_one_inode(root, key.offset); - if (!inode) - return -EIO; + if (!inode) { + ret = -EIO; + break; + } ret = fixup_inode_link_count(trans, root, inode); iput(inode); if (ret) - goto out; + break; /* * fixup on a directory may create new entries, @@ -1806,8 +1809,6 @@ static noinline int fixup_inode_link_counts(struct btrfs_trans_handle *trans, */ key.offset = (u64)-1; } - ret = 0; -out: btrfs_release_path(path); return ret; } |