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This is a static checker fix, not something I have tested. The issue
is that on the second iteration through the loop, we jump forward by
le32_to_cpu(auth_req->length) bytes. The problem is that if the length
is more than "buflen" then we end up with a negative "buflen". A
negative buflen is type promoted to a high positive value and the loop
continues but it's accessing beyond the end of the buffer.
I believe the "auth_req->length" comes from the firmware and if the
firmware is malicious or buggy, you're already toasted so the impact of
this bug is probably not very severe.
Fixes: 030645aceb3d ("rndis_wlan: handle 802.11 indications from device")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
ae636fb155