From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZpIhf3Cv/fHrAhX9CdWlTW1xs28Snme7j1f7F23OI06/N8XdmDOvKMI8RFhldXswErCSIVu ARC-Seal: i=1; a=rsa-sha256; t=1524652733; cv=none; d=google.com; s=arc-20160816; b=MZo91XXZja10fzP2aGFDw789VMd+9vzUz6jN6DBTJamFOPqp/AJxkhlAlhePraVFj8 CMh/Kd0yqdlbJdus4g8I+jmwWf56snhjMGV4okaZ7aBiEIMYN6fHJISJtPgP8DG8Ysga /Sc0Dzs2q4egvAJYqL64nSWXFGtxqmJg+3GIJdMIgtBIwWFvvp7jitS3lFxGkHjMYQMx noimQzoyrT0cQCcL2NVFhb+yGxA8xMge6qN5x7cgeT+ec22NKS54BY+tHUuTK8CpM38s HShliKtyBC+HUOU2YfveGaJ31nLsXEDGhi1Zcun0LKhPPrFt43kkb2ddyi1WSqRvHz60 SFcA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=aBgoYylHLffuEKY85Qq3WJgeeJgDsLn6+nWrDNxcx4M=; b=RBJtKpl5ZffpaGo48bp7sEPWOC1YV2gU4QSo+HiwmltjRTDlZ7NPg2+ukDjTFwAnH0 +/o5+W4PUBTr3iaBGEM39cVFbaBy5QKTO7mLfz0yI9YplQ7KNbu96XPmcT/CNCyV1w7o NCT6D/TK+7+RPthyhCPH3yVwgBxbBXd72w60HTKJSFV94hPHMv7pyvnglNOv6vOVWPu7 6kBeTabJsLS8zKCruKmDRHc9uD1ONP7dxPQ+X5x+/YYym4ifvq/5LnhoY8iZXRTRTT9c DbLK8MASP0S4vBVG52syXEA95IqXO8f7YKs1FezW/fDXvHY2Qi14v5TmjjnKxLP0jnmR gefg== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.61.202 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.61.202 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hyunchul Lee , Geert Uytterhoeven , Richard Weinberger , Sasha Levin Subject: [PATCH 4.14 049/183] ubifs: Fix uninitialized variable in search_dh_cookie() Date: Wed, 25 Apr 2018 12:34:29 +0200 Message-Id: <20180425103244.527151465@linuxfoundation.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180425103242.532713678@linuxfoundation.org> References: <20180425103242.532713678@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1598714265069543698?= X-GMAIL-MSGID: =?utf-8?q?1598714265069543698?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Geert Uytterhoeven [ Upstream commit c877154d307f4a91e0b5b85b75535713dab945ae ] 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 Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- fs/ubifs/tnc.c | 21 +++++++-------------- 1 file changed, 7 insertions(+), 14 deletions(-) --- a/fs/ubifs/tnc.c +++ b/fs/ubifs/tnc.c @@ -1890,35 +1890,28 @@ static int search_dh_cookie(struct ubifs 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,