usb: gadget: rndis: prevent integer overflow in rndis_set_response()

stable inclusion
from stable-v5.10.108
commit 28bc0267399f42f987916a7174e2e32f0833cc65
bugzilla: https://gitee.com/openeuler/kernel/issues/I574A9

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=28bc0267399f42f987916a7174e2e32f0833cc65

--------------------------------

commit 65f3324f upstream.

If "BufOffset" is very large the "BufOffset + 8" operation can have an
integer overflow.

Cc: stable@kernel.org
Fixes: 38ea1eac ("usb: gadget: rndis: check size of RNDIS_MSG_SET command")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20220301080424.GA17208@kiliSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NYu Liao <liaoyu15@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/usb/gadget/function/rndis.c

@@ -658,6 +658,7 @@ static int rndis_set_response(struct rndis_params *params,
 	BufLength = le32_to_cpu(buf->InformationBufferLength);
 	BufOffset = le32_to_cpu(buf->InformationBufferOffset);
 	if ((BufLength > RNDIS_MAX_TOTAL_SIZE) ||
+	    (BufOffset > RNDIS_MAX_TOTAL_SIZE) ||
 	    (BufOffset + 8 >= RNDIS_MAX_TOTAL_SIZE))
 		    return -EINVAL;