From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:45264 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758149AbdLRN0g (ORCPT ); Mon, 18 Dec 2017 08:26:36 -0500 Subject: Patch "udf: Avoid overflow when session starts at large offset" has been added to the 4.9-stable tree To: jack@suse.cz, alexander.levin@verizon.com, gregkh@linuxfoundation.org, sliwa@ifpan.edu.pl Cc: , From: Date: Mon, 18 Dec 2017 14:24:00 +0100 Message-ID: <1513603440247140@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled udf: Avoid overflow when session starts at large offset to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: udf-avoid-overflow-when-session-starts-at-large-offset.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Mon Dec 18 14:12:35 CET 2017 From: Jan Kara Date: Mon, 16 Oct 2017 11:38:11 +0200 Subject: udf: Avoid overflow when session starts at large offset From: Jan Kara [ Upstream commit abdc0eb06964fe1d2fea6dd1391b734d0590365d ] When session starts beyond offset 2^31 the arithmetics in udf_check_vsd() would overflow. Make sure the computation is done in large enough type. Reported-by: Cezary Sliwa Signed-off-by: Jan Kara Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- fs/udf/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -710,7 +710,7 @@ static loff_t udf_check_vsd(struct super else sectorsize = sb->s_blocksize; - sector += (sbi->s_session << sb->s_blocksize_bits); + sector += (((loff_t)sbi->s_session) << sb->s_blocksize_bits); udf_debug("Starting at sector %u (%ld byte sectors)\n", (unsigned int)(sector >> sb->s_blocksize_bits), Patches currently in stable-queue which might be from jack@suse.cz are queue-4.9/writeback-fix-memory-leak-in-wb_queue_work.patch queue-4.9/mm-handle-0-flags-in-_calc_vm_trans-macro.patch queue-4.9/udf-avoid-overflow-when-session-starts-at-large-offset.patch