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| author | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2017-12-04 06:14:12 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2018-01-17 17:16:13 +0300 |
| commit | 7690e25302dc7d0cd42b349e746fe44b44a94f2b (patch) | |
| tree | c2172d68ef5a03d1a309be7d7fbb10605ecc8274 /drivers/md/dm-flakey.c | |
| parent | 7efd5fed6fd713e206ace4b71116d0a5d719fb0a (diff) | |
| download | linux-7690e25302dc7d0cd42b349e746fe44b44a94f2b.tar.xz | |
dm flakey: check for null arg_name in parse_features()
One can crash dm-flakey by specifying more feature arguments than the
number of features supplied. Checking for null in arg_name avoids
this.
dmsetup create flakey-test --table "0 66076080 flakey /dev/sdb9 0 0 180 2 drop_writes"
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-flakey.c')
| -rw-r--r-- | drivers/md/dm-flakey.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c index b82cb1ab1eaa..1b907b15f5c3 100644 --- a/drivers/md/dm-flakey.c +++ b/drivers/md/dm-flakey.c @@ -70,6 +70,11 @@ static int parse_features(struct dm_arg_set *as, struct flakey_c *fc, arg_name = dm_shift_arg(as); argc--; + if (!arg_name) { + ti->error = "Insufficient feature arguments"; + return -EINVAL; + } + /* * drop_writes */ |