Commit 286f367d authored by Mike Snitzer's avatar Mike Snitzer Committed by Alasdair G Kergon

dm mpath: fix potential NULL pointer in feature arg processing

Avoid dereferencing a NULL pointer if the number of feature arguments
supplied is fewer than indicated.
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
Cc: stable@kernel.org
parent 762a80d9
...@@ -807,6 +807,11 @@ static int parse_features(struct arg_set *as, struct multipath *m) ...@@ -807,6 +807,11 @@ static int parse_features(struct arg_set *as, struct multipath *m)
if (!argc) if (!argc)
return 0; return 0;
if (argc > as->argc) {
ti->error = "not enough arguments for features";
return -EINVAL;
}
do { do {
param_name = shift(as); param_name = shift(as);
argc--; argc--;
......
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