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block: sed-opal: Fix a couple off by one bugs 

resp->num is the number of tokens in resp->tok[].  It gets set in
response_parse().  So if n == resp->num then we're reading beyond the
end of the data.

Fixes: 455a7b238c ("block: Add Sed-opal library")
Reviewed-by: Scott Bauer <scott.bauer@intel.com>
Tested-by: Scott Bauer <scott.bauer@intel.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Dan Carpenter 2018-06-20 13:41:51 +03:00 committed by Jens Axboe
parent a1e7918862
commit ce042c183b
1 changed files with 2 additions and 2 deletions
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4
block/sed-opal.c
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@ -877,7 +877,7 @@ static size_t response_get_string(const struct parsed_resp *resp, int n,
return 0;
}
if (n > resp->num) {
if (n >= resp->num) {
pr_debug("Response has %d tokens. Can't access %d\n",
resp->num, n);
return 0;
@ -916,7 +916,7 @@ static u64 response_get_u64(const struct parsed_resp *resp, int n)
return 0;
}
if (n > resp->num) {
if (n >= resp->num) {
pr_debug("Response has %d tokens. Can't access %d\n",
resp->num, n);
return 0;