From c877154d307f4a91e0b5b85b75535713dab945ae Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 17 Sep 2017 10:32:20 +0200 Subject: ubifs: Fix uninitialized variable in search_dh_cookie() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit fs/ubifs/tnc.c: In function ‘search_dh_cookie’: fs/ubifs/tnc.c:1893: warning: ‘err’ is used uninitialized in this function Indeed, err is always used uninitialized. According to an original review comment from Hyunchul, acknowledged by Richard, err should be initialized to -ENOENT to avoid the first call to tnc_next(). But we can achieve the same by reordering the code. Fixes: 781f675e2d7e ("ubifs: Fix unlink code wrt. double hash lookups") Reported-by: Hyunchul Lee Signed-off-by: Geert Uytterhoeven Signed-off-by: Richard Weinberger --- fs/ubifs/tnc.c | 21 +++++++-------------- 1 file changed, 7 insertions(+), 14 deletions(-) (limited to 'fs/ubifs') diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c index 0a213dcba2a1..ba3d0e0f8615 100644 --- a/fs/ubifs/tnc.c +++ b/fs/ubifs/tnc.c @@ -1890,35 +1890,28 @@ static int search_dh_cookie(struct ubifs_info *c, const union ubifs_key *key, union ubifs_key *dkey; for (;;) { - if (!err) { - err = tnc_next(c, &znode, n); - if (err) - goto out; - } - zbr = &znode->zbranch[*n]; dkey = &zbr->key; if (key_inum(c, dkey) != key_inum(c, key) || key_type(c, dkey) != key_type(c, key)) { - err = -ENOENT; - goto out; + return -ENOENT; } err = tnc_read_hashed_node(c, zbr, dent); if (err) - goto out; + return err; if (key_hash(c, key) == key_hash(c, dkey) && le32_to_cpu(dent->cookie) == cookie) { *zn = znode; - goto out; + return 0; } - } - -out: - return err; + err = tnc_next(c, &znode, n); + if (err) + return err; + } } static int do_lookup_dh(struct ubifs_info *c, const union ubifs_key *key, -- cgit v1.2.3