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authorMike Snitzer <snitzer@redhat.com>2011-08-02 15:32:00 +0400
committerAlasdair G Kergon <agk@redhat.com>2011-08-02 15:32:00 +0400
commit286f367dad40beb3234a18c17391d03ba939a7f3 (patch)
tree50e7b04332ce6e8ab920284528d555e67aae2081 /drivers/md/dm-mpath.c
parent762a80d9fc9f690a3a35983f3b4619a220650808 (diff)
downloadlinux-286f367dad40beb3234a18c17391d03ba939a7f3.tar.xz
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
Diffstat (limited to 'drivers/md/dm-mpath.c')
-rw-r--r--drivers/md/dm-mpath.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index c3547016f0f1..adf851a081bd 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -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--;