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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: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: stable@kernel.org
This commit is contained in:
Mike Snitzer 2011-08-02 12:32:00 +01:00 committed by Alasdair G Kergon
parent 762a80d9fc
commit 286f367dad
1 changed files with 5 additions and 0 deletions
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5
drivers/md/dm-mpath.c
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@ -807,6 +807,11 @@ static int parse_features(struct arg_set *as, struct multipath *m)
if (!argc)
return 0;
if (argc > as->argc) {
ti->error = "not enough arguments for features";
return -EINVAL;
}
do {
param_name = shift(as);
argc--;