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authorNikanth Karthikesan <knikanth@suse.de>2010-02-16 21:42:47 +0300
committerAlasdair G Kergon <agk@redhat.com>2010-02-16 21:42:47 +0300
commit781248c1b50c776a9ef4be1130f84ced1cba42fe (patch)
treeaa102797cde7b10623eefbeee493c36fdf2bdfe3 /drivers/md
parent0813e22d4e0d618eac9b47bec942bf856adca4c5 (diff)
downloadlinux-781248c1b50c776a9ef4be1130f84ced1cba42fe.tar.xz
dm stripe: avoid divide by zero with invalid stripe count
If a table containing zero as stripe count is passed into stripe_ctr the code attempts to divide by zero. This patch changes DM_TABLE_LOAD to return -EINVAL if the stripe count is zero. We now get the following error messages: device-mapper: table: 253:0: striped: Invalid stripe count device-mapper: ioctl: error adding target to table Signed-off-by: Nikanth Karthikesan <knikanth@suse.de> Cc: stable@kernel.org Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-stripe.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index e0efc1adcaff..bd58703ee8f6 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -110,7 +110,7 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv)
}
stripes = simple_strtoul(argv[0], &end, 10);
- if (*end) {
+ if (!stripes || *end) {
ti->error = "Invalid stripe count";
return -EINVAL;
}