This is a note to let you know that I've just added the patch titled
dm stats: fix divide by zero if 'number_of_areas' arg is zero
to the 4.1-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:
dm-stats-fix-divide-by-zero-if-number_of_areas-arg-is-zero.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From dd4c1b7d0c95be1c9245118a3accc41a16f1db67 Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Date: Fri, 5 Jun 2015 09:50:42 -0400
Subject: dm stats: fix divide by zero if 'number_of_areas' arg is zero
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
commit dd4c1b7d0c95be1c9245118a3accc41a16f1db67 upstream.
If the number_of_areas argument was zero the kernel would crash on
div-by-zero. Add better input validation.
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-stats.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/md/dm-stats.c
+++ b/drivers/md/dm-stats.c
@@ -795,6 +795,8 @@ static int message_stats_create(struct m
return -EINVAL;
if (sscanf(argv[2], "/%u%c", &divisor, &dummy) == 1) {
+ if (!divisor)
+ return -EINVAL;
step = end - start;
if (do_div(step, divisor))
step++;
Patches currently in stable-queue which might be from mpatocka@xxxxxxxxxx are
queue-4.1/dm-stats-fix-divide-by-zero-if-number_of_areas-arg-is-zero.patch
queue-4.1/libata-increase-the-timeout-when-setting-transfer-mode.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html