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| author | Geert Uytterhoeven <geert@linux-m68k.org> | 2017-09-17 11:32:20 +0300 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2018-01-17 21:28:53 +0300 |
| commit | c877154d307f4a91e0b5b85b75535713dab945ae (patch) | |
| tree | 88a8b224272d08b87ad8223d9c2eab97411140c0 | |
| parent | a8750ddca918032d6349adbf9a4b6555e7db20da (diff) | |
| download | linux-c877154d307f4a91e0b5b85b75535713dab945ae.tar.xz | |
ubifs: Fix uninitialized variable in search_dh_cookie()
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 <hyc.lee@gmail.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
| -rw-r--r-- | fs/ubifs/tnc.c | 21 |
1 files changed, 7 insertions, 14 deletions
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, |