From: Qiujun Huang <hqjagain@xxxxxxxxx> 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@xxxxxxxx> Reported-and-tested-by: syzbot+7d42d68643a35f71ac8a@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Qiujun Huang <hqjagain@xxxxxxxxx> Cc: stable <stable@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20200326131850.17711-1-hqjagain@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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 @@ -3574,6 +3574,8 @@ static void hfa384x_int_rxmonitor(wlande 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);
