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dm mpath: fix potential NULL pointer in feature arg processing

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commit 286f367dad40beb3234a18c17391d03ba939a7f3 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Mike Snitzer
2011-08-02 12:32:00 +01:00
committed by Greg Kroah-Hartman
parent b41ed9c38a
commit eb81cf19f5
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) 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--;