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 A1EDA171A1 for ; Mon, 22 May 2023 19:15:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 31794C433D2; Mon, 22 May 2023 19:15:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1684782953; bh=RIs3bOZOYO+vIpkypdWAjJCJO9m9XDgB9ZN7hJMrgeE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RSGJvYgApsdpzN6Jf7fYRVzC4zB/vqL1DRgNzRcZKR8Iy6PmExDq45otszIHGSbxz hITXVsAksdC+YULjeEGZlptggd9aMRzIUyM22O1d0I8+hOWyw+f3z5HO2tt3Ykj8sz l58c9FdOK1FlerHLlkGMpre1h2xo6dIGJRgYS874= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+45d4691b1ed3c48eba05@syzkaller.appspotmail.com, Andreas Gruenbacher , Sasha Levin Subject: [PATCH 5.15 060/203] gfs2: Fix inode height consistency check Date: Mon, 22 May 2023 20:08:04 +0100 Message-Id: <20230522190356.655605594@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230522190354.935300867@linuxfoundation.org> References: <20230522190354.935300867@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Andreas Gruenbacher [ Upstream commit cfcdb5bad34f600aed7613c3c1a5e618111f77b7 ] The maximum allowed height of an inode's metadata tree depends on the filesystem block size; it is lower for bigger-block filesystems. When reading in an inode, make sure that the height doesn't exceed the maximum allowed height. Arrays like sd_heightsize are sized to be big enough for any filesystem block size; they will often be slightly bigger than what's needed for a specific filesystem. Reported-by: syzbot+45d4691b1ed3c48eba05@syzkaller.appspotmail.com Signed-off-by: Andreas Gruenbacher Signed-off-by: Sasha Levin --- fs/gfs2/glops.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c index 450032b4c886e..558932ad89d5d 100644 --- a/fs/gfs2/glops.c +++ b/fs/gfs2/glops.c @@ -394,6 +394,7 @@ static int inode_go_demote_ok(const struct gfs2_glock *gl) static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) { + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); const struct gfs2_dinode *str = buf; struct timespec64 atime; u16 height, depth; @@ -440,7 +441,7 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */ gfs2_set_inode_flags(inode); height = be16_to_cpu(str->di_height); - if (unlikely(height > GFS2_MAX_META_HEIGHT)) + if (unlikely(height > sdp->sd_max_height)) goto corrupt; ip->i_height = (u8)height; -- 2.39.2