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 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: udf-avoid-overflow-when-session-starts-at-large-offset.patch and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Mon Dec 18 15:03:25 CET 2017
From: Jan Kara jack@suse.cz Date: Mon, 16 Oct 2017 11:38:11 +0200 Subject: udf: Avoid overflow when session starts at large offset
From: Jan Kara jack@suse.cz
[ 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 sliwa@ifpan.edu.pl Signed-off-by: Jan Kara jack@suse.cz Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/udf/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -706,7 +706,7 @@ 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-3.18/mm-handle-0-flags-in-_calc_vm_trans-macro.patch queue-3.18/udf-avoid-overflow-when-session-starts-at-large-offset.patch