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wifi: ath12k: Fix a NULL pointer dereference in ath12k_mac_op_hw_scan()

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In ath12k_mac_op_hw_scan(), the return value of kzalloc() is directly
used in memcpy(), which may lead to a NULL pointer dereference on
failure of kzalloc().

Fix this bug by adding a check of arg.extraie.ptr.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4

Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230726092625.3350-1-quic_wgong@quicinc.com
This commit is contained in:
Wen Gong 2023-07-26 05:26:25 -04:00 committed by Kalle Valo
parent 13329d0cb7
commit 8ad314da54
1 changed files with 5 additions and 2 deletions
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7
drivers/net/wireless/ath/ath12k/mac.c
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@ -2755,9 +2755,12 @@ static int ath12k_mac_op_hw_scan(struct ieee80211_hw *hw,
arg.scan_id = ATH12K_SCAN_ID;
if (req->ie_len) {
arg.extraie.ptr = kmemdup(req->ie, req->ie_len, GFP_KERNEL);
if (!arg.extraie.ptr) {
ret = -ENOMEM;
goto exit;
}
arg.extraie.len = req->ie_len;
arg.extraie.ptr = kzalloc(req->ie_len, GFP_KERNEL);
memcpy(arg.extraie.ptr, req->ie, req->ie_len);
}
if (req->n_ssids) {