commit: 286f367dad40beb3234a18c17391d03ba939a7f3
From: Mike Snitzer <snit...@redhat.com>
Date: Tue, 2 Aug 2011 12:32:00 +0100
Subject: [PATCH] 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 <snit...@redhat.com>
Signed-off-by: Alasdair G Kergon <a...@redhat.com>
Cc: sta...@kernel.org
---
drivers/md/dm-mpath.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index c354701..adf851a 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--;
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