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| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-06-22 10:12:10 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-06-22 10:12:10 +0100 |
| commit | e094f4f15f5169526c7200b9bde44b900548a81e (patch) | |
| tree | 5ca573d45371779a183276066578bed1f38f11c6 /drivers/md/dm-mpath.c | |
| parent | 0e0497c0c017664994819f4602dc07fd95896c52 (diff) | |
| download | linux-e094f4f15f5169526c7200b9bde44b900548a81e.tar.gz linux-e094f4f15f5169526c7200b9bde44b900548a81e.tar.bz2 linux-e094f4f15f5169526c7200b9bde44b900548a81e.zip | |
dm mpath: validate hw_handler argument count
Fix arg count parsing error in hw handlers.
Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-mpath.c')
| -rw-r--r-- | 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 d880299334e9..f25bdebcb4ab 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -705,6 +705,11 @@ static int parse_hw_handler(struct arg_set *as, struct multipath *m) if (!hw_argc) return 0; + if (hw_argc > as->argc) { + ti->error = "not enough arguments for hardware handler"; + return -EINVAL; + } + m->hw_handler_name = kstrdup(shift(as), GFP_KERNEL); request_module("scsi_dh_%s", m->hw_handler_name); if (scsi_dh_handler_exist(m->hw_handler_name) == 0) { |