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dm mpath: validate hw_handler argument count

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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>
This commit is contained in:
Mikulas Patocka 2009-06-22 10:12:10 +01:00 committed by Alasdair G Kergon
parent 0e0497c0c0
commit e094f4f15f
1 changed files with 5 additions and 0 deletions
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5
drivers/md/dm-mpath.c
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@ -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) {