| Message ID | 1436779298-20993-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/md/dm-stats.c b/drivers/md/dm-stats.c index 28a90122a5a8..b3b0697a9fd7 100644 --- a/drivers/md/dm-stats.c +++ b/drivers/md/dm-stats.c @@ -795,6 +795,8 @@ static int message_stats_create(struct mapped_device *md, return -EINVAL; if (sscanf(argv[2], "/%u%c", &divisor, &dummy) == 1) { + if (!divisor) + return -EINVAL; step = end - start; if (do_div(step, divisor)) step++;
This is a note to let you know that I have just added a patch titled dm stats: fix divide by zero if 'number_of_areas' arg is zero to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue This patch is scheduled to be released in version 3.16.7-ckt15. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.16.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From cc86bf606c197e320e79ce17146926be4f691fd5 Mon Sep 17 00:00:00 2001 From: Mikulas Patocka <mpatocka@redhat.com> Date: Fri, 5 Jun 2015 09:50:42 -0400 Subject: dm stats: fix divide by zero if 'number_of_areas' arg is zero 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@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/md/dm-stats.c | 2 ++ 1 file changed, 2 insertions(+)