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staging: wlan-ng: fix use-after-free Read in hfa384x_usbin_callback

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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@sina.com>
Reported-and-tested-by: syzbot+7d42d68643a35f71ac8a@syzkaller.appspotmail.com
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200326131850.17711-1-hqjagain@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Qiujun Huang 2020-03-26 21:18:50 +08:00 committed by Greg Kroah-Hartman
parent b67b7b0465
commit 1165dd73e8
1 changed files with 2 additions and 0 deletions
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2
drivers/staging/wlan-ng/hfa384x_usb.c
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@ -3376,6 +3376,8 @@ static void hfa384x_int_rxmonitor(struct wlandevice *wlandev,
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);