From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Wen Gong <quic_wgong@quicinc.com>,
Kalle Valo <quic_kvalo@quicinc.com>,
Sasha Levin <sashal@kernel.org>,
kvalo@kernel.org, quic_jjohnson@quicinc.com,
ath12k@lists.infradead.org, linux-wireless@vger.kernel.org
Subject: [PATCH AUTOSEL 6.5 16/45] wifi: ath12k: Fix a NULL pointer dereference in ath12k_mac_op_hw_scan()
Date: Fri, 8 Sep 2023 14:12:57 -0400 [thread overview]
Message-ID: <20230908181327.3459042-16-sashal@kernel.org> (raw)
In-Reply-To: <20230908181327.3459042-1-sashal@kernel.org>
From: Wen Gong <quic_wgong@quicinc.com>
[ Upstream commit 8ad314da54c6dd223a6b6cc85019160aa842f659 ]
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
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/ath/ath12k/mac.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index 1bb9802ef5696..af46b63bb15bc 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -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) {
--
2.40.1
--
ath12k mailing list
ath12k@lists.infradead.org
https://lists.infradead.org/mailman/listinfo/ath12k
next parent reply other threads:[~2023-09-08 18:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20230908181327.3459042-1-sashal@kernel.org>
2023-09-08 18:12 ` Sasha Levin [this message]
2023-09-08 18:12 ` [PATCH AUTOSEL 6.5 17/45] wifi: ath12k: avoid array overflow of hw mode for preferred_hw_mode Sasha Levin
2023-09-08 18:13 ` [PATCH AUTOSEL 6.5 40/45] wifi: ath12k: Fix memory leak in rx_desc and tx_desc Sasha Levin
2023-09-08 18:13 ` [PATCH AUTOSEL 6.5 42/45] wifi: ath12k: add check max message length while scanning with extraie Sasha Levin
2023-09-08 18:13 ` [PATCH AUTOSEL 6.5 43/45] Fix nomenclature for USB and PCI wireless devices Sasha Levin
2023-09-08 19:12 ` Alan Stern
2023-09-08 21:31 ` Greg Kroah-Hartman
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