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 2841B1D9A42; Tue, 15 Oct 2024 11:43:57 +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=1728992637; cv=none; b=oiwnrPyM4ByMseLn7WUv3AuCUD0MRCsTxQzKFi0z6sqKV8XfNFD/nWDCDr84RVJgiWteoM/i5ycikrTYUd4gN9fChjK1J/qeQX5kxkMImouA1GyTxkM7W402SoYJ9w/fLli2ccdHp3FITHJmdlWMvdt0Ib88hCLLNWlF8H+20HA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728992637; c=relaxed/simple; bh=9aZCCdqIATW/4oowozvTaqTVf1WwfCKKI7lpVJbXI5g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nbXPyEszzf5F64HiVoPXqFKKTO1eZLfBXcMJ+ON73zklYsryu7v3Cs0M8G+tasAyT6jI7q7lK8JU4vrYiqL4YCn0MtmMadTiR2JBM1XBNylUm62GLACk97UjIP88HKHG6R+W6zeNf9KECZXMLrpOMqGc0GFEIeeZQp0KUH1h2Hk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=jfW5mNX0; 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="jfW5mNX0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D491C4CEC6; Tue, 15 Oct 2024 11:43:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728992637; bh=9aZCCdqIATW/4oowozvTaqTVf1WwfCKKI7lpVJbXI5g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jfW5mNX0RlZ9Af3p48DRdKBcPQgrMg+ydzSEi71v97igFlc+h2euObxjsm4/VZLj6 nCkGkf/oNOV1T0lafmIEC5WsAMCKaG6ijLrtYDWbHNK3sLKxq2C/OeyZtRN6xQGYx9 76UCrRHYUXNBEzHMPVgFDbsGUh1kt0RtGXyFr+44= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jeongjun Park , Dave Kleikamp , Sasha Levin Subject: [PATCH 5.15 173/691] jfs: fix out-of-bounds in dbNextAG() and diAlloc() Date: Tue, 15 Oct 2024 13:22:01 +0200 Message-ID: <20241015112447.232203476@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241015112440.309539031@linuxfoundation.org> References: <20241015112440.309539031@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jeongjun Park [ Upstream commit e63866a475562810500ea7f784099bfe341e761a ] In dbNextAG() , there is no check for the case where bmp->db_numag is greater or same than MAXAG due to a polluted image, which causes an out-of-bounds. Therefore, a bounds check should be added in dbMount(). And in dbNextAG(), a check for the case where agpref is greater than bmp->db_numag should be added, so an out-of-bounds exception should be prevented. Additionally, a check for the case where agno is greater or same than MAXAG should be added in diAlloc() to prevent out-of-bounds. Reported-by: Jeongjun Park Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Jeongjun Park Signed-off-by: Dave Kleikamp Signed-off-by: Sasha Levin --- fs/jfs/jfs_dmap.c | 4 ++-- fs/jfs/jfs_imap.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c index 3f5c14315719b..625457e94b30a 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -187,7 +187,7 @@ int dbMount(struct inode *ipbmap) } bmp->db_numag = le32_to_cpu(dbmp_le->dn_numag); - if (!bmp->db_numag) { + if (!bmp->db_numag || bmp->db_numag >= MAXAG) { err = -EINVAL; goto err_release_metapage; } @@ -652,7 +652,7 @@ int dbNextAG(struct inode *ipbmap) * average free space. */ for (i = 0 ; i < bmp->db_numag; i++, agpref++) { - if (agpref == bmp->db_numag) + if (agpref >= bmp->db_numag) agpref = 0; if (atomic_read(&bmp->db_active[agpref])) diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c index ba6f28521360b..c72e97f065798 100644 --- a/fs/jfs/jfs_imap.c +++ b/fs/jfs/jfs_imap.c @@ -1360,7 +1360,7 @@ int diAlloc(struct inode *pip, bool dir, struct inode *ip) /* get the ag number of this iag */ agno = BLKTOAG(JFS_IP(pip)->agstart, JFS_SBI(pip->i_sb)); dn_numag = JFS_SBI(pip->i_sb)->bmap->db_numag; - if (agno < 0 || agno > dn_numag) + if (agno < 0 || agno > dn_numag || agno >= MAXAG) return -EIO; if (atomic_read(&JFS_SBI(pip->i_sb)->bmap->db_active[agno])) { -- 2.43.0