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Message-Id: <20200331085314.292545907@linuxfoundation.org>
Date: Tue, 31 Mar 2020 10:59:25 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Qiujun Huang <hqjagain@...il.com>,
syzbot+7d42d68643a35f71ac8a@...kaller.appspotmail.com
Subject: [PATCH 5.6 13/23] staging: wlan-ng: fix use-after-free Read in hfa384x_usbin_callback
From: Qiujun Huang <hqjagain@...il.com>
commit 1165dd73e811a07d947aee218510571f516081f6 upstream.
We can't handle the case length > WLAN_DATA_MAXLEN.
Because the size of rxfrm->data is WLAN_DATA_MAXLEN(2312), and we can't
read more than that.
Thanks-to: Hillf Danton <hdanton@...a.com>
Reported-and-tested-by: syzbot+7d42d68643a35f71ac8a@...kaller.appspotmail.com
Signed-off-by: Qiujun Huang <hqjagain@...il.com>
Cc: stable <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20200326131850.17711-1-hqjagain@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/staging/wlan-ng/hfa384x_usb.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/staging/wlan-ng/hfa384x_usb.c
+++ b/drivers/staging/wlan-ng/hfa384x_usb.c
@@ -3372,6 +3372,8 @@ static void hfa384x_int_rxmonitor(struct
WLAN_HDR_A4_LEN + WLAN_DATA_MAXLEN + WLAN_CRC_LEN)) {
pr_debug("overlen frm: len=%zd\n",
skblen - sizeof(struct p80211_caphdr));
+
+ return;
}
skb = dev_alloc_skb(skblen);
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