Commit 773fdcdc authored by Dan Carpenter's avatar Dan Carpenter Committed by Greg Kroah-Hartman

staging: rtl8188eu: prevent an underflow in rtw_check_beacon_data()

commit 784047eb upstream.

The "len" could be as low as -14 so we should check for negatives.

Fixes: 9a7fe54d ("staging: r8188eu: Add source files for new driver - part 1")
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ed13a9c6
......@@ -890,7 +890,7 @@ int rtw_check_beacon_data(struct adapter *padapter, u8 *pbuf, int len)
return _FAIL;
if (len > MAX_IE_SZ)
if (len < 0 || len > MAX_IE_SZ)
return _FAIL;
pbss_network->IELength = len;
......
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