Commit 4edabfd7 authored Apr 23, 2017 by Pan Bian Committed by Trond Myklebust Apr 28, 2017

NFSv4: check return value of xdr_inline_decode



Function xdr_inline_decode() will return a NULL pointer if the input
buffer does not have long enough buffer to decode nbytes of data.
However, in function decode_op_map(), the return value of
xdr_inline_decode() is not validated before it is used. This patch adds
a check to the return value of xdr_inline_decode().

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

parent 209aa230

fs/nfs/nfs4xdr.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -5570,6 +5570,8 @@ static int decode_op_map(struct xdr_stream xdr, struct nfs4_op_map op_map)
		unsigned int i;

		p = xdr_inline_decode(xdr, 4);
		if (!p)
		return -EIO;
		bitmap_words = be32_to_cpup(p++);
		if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
		return -EIO;