[PATCH wireless] wifi: nxpwifi: fix NULL deref and leak in authenticate

[techyminati <sinha.aryan03@gmail.com>]

From: Aryan Sinha <sinha.aryan03@gmail.com>

mgmt is allocated but never checked, and the auth frame is filled in
right after, so a failed kzalloc ends up dereferencing NULL. The skb
error path also returns without freeing mgmt.

Hence, Check the allocation, and free mgmt when the skb alloc fails.

Fixes: 73b01e57ed3e ("wifi: nxp: add nxpwifi driver for IW61x")
Signed-off-by: Aryan Sinha <sinha.aryan03@gmail.com>
---
 drivers/net/wireless/nxp/nxpwifi/cfg80211.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/nxp/nxpwifi/cfg80211.c b/drivers/net/wireless/nxp/nxpwifi/cfg80211.c
index 86304ea33..9eb809caa 100644
--- a/drivers/net/wireless/nxp/nxpwifi/cfg80211.c
+++ b/drivers/net/wireless/nxp/nxpwifi/cfg80211.c
@@ -3403,6 +3403,8 @@ nxpwifi_cfg80211_authenticate(struct wiphy *wiphy,
 		pkt_len -= 4;
 
 	mgmt = kzalloc(pkt_len, GFP_KERNEL);
+	if (!mgmt)
+		return -ENOMEM;
 
 	skb = dev_alloc_skb(NXPWIFI_MIN_DATA_HEADER_LEN +
 			    NXPWIFI_MGMT_FRAME_HEADER_SIZE +
@@ -3410,6 +3412,7 @@ nxpwifi_cfg80211_authenticate(struct wiphy *wiphy,
 	if (!skb) {
 		nxpwifi_dbg(adapter, ERROR,
 			    "allocate skb failed for management frame\n");
+		kfree(mgmt);
 		return -ENOMEM;
 	}
 
-- 
2.46.0