Messages in this thread Patch in this message | | | From | trix@redhat ... | Subject | [PATCH] rndis_wlan: tighten check of rndis_query_oid return | Date | Tue, 11 Aug 2020 07:02:19 -0700 |
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From: Tom Rix <trix@redhat.com>
clang static analysis reports this problem
rndis_wlan.c:3147:25: warning: Assigned value is garbage or undefined wiphy->max_num_pmkids = le32_to_cpu(caps.num_pmkids); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The setting of caps happens here, with a call to rndis_query_oid()
retval = rndis_query_oid(usbdev, if (retval >= 0) {
Reviewing rndis_query_oid() shows that on success 0 is returned, failure is otherwise. So the retval check is not tight enough. So tighten the retval check. Similar problem in rndis_wlan_get_caps().
Signed-off-by: Tom Rix <trix@redhat.com> --- drivers/net/wireless/rndis_wlan.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/rndis_wlan.c b/drivers/net/wireless/rndis_wlan.c index 8852a1832951..75b5d545b49e 100644 --- a/drivers/net/wireless/rndis_wlan.c +++ b/drivers/net/wireless/rndis_wlan.c @@ -3112,7 +3112,7 @@ static int rndis_wlan_get_caps(struct usbnet *usbdev, struct wiphy *wiphy) retval = rndis_query_oid(usbdev, RNDIS_OID_802_11_NETWORK_TYPES_SUPPORTED, &networks_supported, &len); - if (retval >= 0) { + if (!retval) { n = le32_to_cpu(networks_supported.num_items); if (n > 8) n = 8; @@ -3137,7 +3137,7 @@ static int rndis_wlan_get_caps(struct usbnet *usbdev, struct wiphy *wiphy) retval = rndis_query_oid(usbdev, RNDIS_OID_802_11_CAPABILITY, &caps, &len); - if (retval >= 0) { + if (!retval) { netdev_dbg(usbdev->net, "RNDIS_OID_802_11_CAPABILITY -> len %d, " "ver %d, pmkids %d, auth-encr-pairs %d\n", le32_to_cpu(caps.length), -- 2.18.1
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