Commit 23a9dbbe authored by Dan Carpenter's avatar Dan Carpenter Committed by Chuck Lever
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NFSD: prevent integer overflow on 32 bit systems 



On a 32 bit system, the "len * sizeof(*p)" operation can have an
integer overflow.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent 184416d4

include/linux/sunrpc/xdr.h

+2 −0
Original line number Diff line number Diff line
@@ -731,6 +731,8 @@ xdr_stream_decode_uint32_array(struct xdr_stream *xdr, 


	if (unlikely(xdr_stream_decode_u32(xdr, &len) < 0))

		return -EBADMSG;

	if (len > SIZE_MAX / sizeof(*p))

		return -EBADMSG;

	p = xdr_inline_decode(xdr, len * sizeof(*p));

	if (unlikely(!p))

		return -EBADMSG;