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| author |   Nikanth Karthikesan <knikanth@suse.de> | 2010-02-16 18:42:47 +0000 |
|---|---|---|
| committer |   Alasdair G Kergon <agk@redhat.com> | 2010-02-16 18:42:47 +0000 |
| commit | 781248c1b50c776a9ef4be1130f84ced1cba42fe (patch) | |
| tree | aa102797cde7b10623eefbeee493c36fdf2bdfe3 /drivers/md/dm-stripe.c | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable (diff) | |
| download | linux-dev-781248c1b50c776a9ef4be1130f84ced1cba42fe.tar.xz linux-dev-781248c1b50c776a9ef4be1130f84ced1cba42fe.zip | |
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/dm-stripe.c')
| -rw-r--r-- | drivers/md/dm-stripe.c | 2 |
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; } |