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 A2BBB1D5AD7; Wed, 6 Nov 2024 12:11:08 +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=1730895068; cv=none; b=fdH4PboHGWN90VI05NQ1wC/f0SgiMMheD7FO/L+fynCMerJ5BOe3U4FlwP0uELWpq9UUsr9hl6TonkFbDAZCTIrjyyINI9pemUI//kMulRq06xTc7Pqa9bJ3z2b9TZBQZP398FYQQ6/g3Z7AFbgTBWBjClmJSoNvMGUwSjSkrs8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730895068; c=relaxed/simple; bh=PSzCCoNDsfZIuuMCBt46opMlN1EK/pzTzYQ1HbxT1H8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nvb46o/CIX332KKlnCKmiIcmGSdOjOmsTBMy+e2FwmNctgd6p9ys3IPK2Ka+M8fPFJfylmJXHZeD25RCH+Cgnq5ffNlOYOPBb/MwMVpP6WIyktatSuJhlNWifR7pecT+W4Zo8uCgrU9OOyB1dANpMWniFUx5FkGtGNJWy+CcLxM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=l/Xoxz/z; 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="l/Xoxz/z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1EA32C4CECD; Wed, 6 Nov 2024 12:11:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1730895068; bh=PSzCCoNDsfZIuuMCBt46opMlN1EK/pzTzYQ1HbxT1H8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=l/Xoxz/zFyaA6hE6k11b5FT8gHKbM5m7FXtr9Wk6vF5Uxf9a7UV2c42Iy29gKjfUx fshQvyyUIZvEAN8V0UN2D0ZaLPwVyGPc7p60byNLp2sqPmAMMvlJw8jh7LUf478XIO DO9tor+SY0XekKTaSc3+aTgRM5eHpBYbOCyqpR5g= 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 4.19 058/350] jfs: fix out-of-bounds in dbNextAG() and diAlloc() Date: Wed, 6 Nov 2024 12:59:46 +0100 Message-ID: <20241106120322.321530837@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241106120320.865793091@linuxfoundation.org> References: <20241106120320.865793091@linuxfoundation.org> User-Agent: quilt/0.67 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 4.19-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 893bc59658dad..1128bcdf5024a 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -200,7 +200,7 @@ 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; } @@ -665,7 +665,7 @@ 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 9893cb6b8a756..1e9a3ec4bfa84 100644 --- a/fs/jfs/jfs_imap.c +++ b/fs/jfs/jfs_imap.c @@ -1375,7 +1375,7 @@ 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