From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 63A4C2472AF; Mon, 23 Jun 2025 13:40:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750686045; cv=none; b=W/yrBlN6qMKWY8+MLevY+XwlHfibLWXsLgoH+JguHaw8JInq1YdF6Q70KH+PejkSqddHPDkBCL2ZvMF2IzVqk6fHFQy0kL1XVE3VKOcM9d3erlhN+Lr/QjyrmkBonEZ44B/unLhrTHaDB5xzxJ6zFvI2kbRB+XtXk6vsk216dYU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750686045; c=relaxed/simple; bh=Pi77n1zypkNh8gdmom/pSHnuFelK8ITmXAdTnEL+3B0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Xnq0RSKmDM4M0jlZj2Mok4Ky3Re/FTLgbOCLvhjleZFx++2oc0QbCgwqDKZpxqLXocAgtLeo2d3eHxDhTFQtCfn96uf0qlZB15Bher7DdeTf8zkI+V9tbwGuBGBUdgGRmtKNvYZOBLzG2rQDH4KtBNubEVSDM/uPXvwKXzMGCTs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=zOhrbpUy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="zOhrbpUy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ED14FC4CEEA; Mon, 23 Jun 2025 13:40:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750686045; bh=Pi77n1zypkNh8gdmom/pSHnuFelK8ITmXAdTnEL+3B0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zOhrbpUyYILK5U2CbT/lPeTrZsq9nTbAYQtXIqKYZU5M1gOVHZqtMNXqp4po3dwMx TBhoXqkyLZW/9XoNcdEtrdqaw3KykoVe6gwdFfkgcYhpY9/yUf6zE+1b62Vi60n196 AnzvuSqRSPHpPtnqpIyhBjHcFuhN5iWHmhTvJzdA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+b974bd41515f770c608b@syzkaller.appspotmail.com, Aditya Dutt , Dave Kleikamp , Sasha Levin Subject: [PATCH 6.15 278/592] jfs: fix array-index-out-of-bounds read in add_missing_indices Date: Mon, 23 Jun 2025 15:03:56 +0200 Message-ID: <20250623130706.950073107@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250623130700.210182694@linuxfoundation.org> References: <20250623130700.210182694@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Aditya Dutt [ Upstream commit 5dff41a86377563f7a2b968aae00d25b4ceb37c9 ] stbl is s8 but it must contain offsets into slot which can go from 0 to 127. Added a bound check for that error and return -EIO if the check fails. Also make jfs_readdir return with error if add_missing_indices returns with an error. Reported-by: syzbot+b974bd41515f770c608b@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com./bug?extid=b974bd41515f770c608b Signed-off-by: Aditya Dutt Signed-off-by: Dave Kleikamp Signed-off-by: Sasha Levin --- fs/jfs/jfs_dtree.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c index 93db6eec44655..ab11849cf9cc3 100644 --- a/fs/jfs/jfs_dtree.c +++ b/fs/jfs/jfs_dtree.c @@ -2613,7 +2613,7 @@ void dtInitRoot(tid_t tid, struct inode *ip, u32 idotdot) * fsck.jfs should really fix this, but it currently does not. * Called from jfs_readdir when bad index is detected. */ -static void add_missing_indices(struct inode *inode, s64 bn) +static int add_missing_indices(struct inode *inode, s64 bn) { struct ldtentry *d; struct dt_lock *dtlck; @@ -2622,7 +2622,7 @@ static void add_missing_indices(struct inode *inode, s64 bn) struct lv *lv; struct metapage *mp; dtpage_t *p; - int rc; + int rc = 0; s8 *stbl; tid_t tid; struct tlock *tlck; @@ -2647,6 +2647,16 @@ static void add_missing_indices(struct inode *inode, s64 bn) stbl = DT_GETSTBL(p); for (i = 0; i < p->header.nextindex; i++) { + if (stbl[i] < 0) { + jfs_err("jfs: add_missing_indices: Invalid stbl[%d] = %d for inode %ld, block = %lld", + i, stbl[i], (long)inode->i_ino, (long long)bn); + rc = -EIO; + + DT_PUTPAGE(mp); + txAbort(tid, 0); + goto end; + } + d = (struct ldtentry *) &p->slot[stbl[i]]; index = le32_to_cpu(d->index); if ((index < 2) || (index >= JFS_IP(inode)->next_index)) { @@ -2664,6 +2674,7 @@ static void add_missing_indices(struct inode *inode, s64 bn) (void) txCommit(tid, 1, &inode, 0); end: txEnd(tid); + return rc; } /* @@ -3017,7 +3028,8 @@ int jfs_readdir(struct file *file, struct dir_context *ctx) } if (fix_page) { - add_missing_indices(ip, bn); + if ((rc = add_missing_indices(ip, bn))) + goto out; page_fixed = 1; } -- 2.39.5