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svcrdma: Verify read-list fits within RPCSVC_MAXPAGES

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A RDMA read-list cannot contain more elements than RPCSVC_MAXPAGES or
it will overflow the DTO context. Verify this when processing the
protocol header.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
This commit is contained in:
Tom Tucker
2008-05-13 09:16:05 -05:00
parent 008fdbc571
commit a6f911c04e
1 changed files with 2 additions and 0 deletions
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2
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
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@@ -306,6 +306,8 @@ static int rdma_read_xdr(struct svcxprt_rdma *xprt,
ch_sge_ary = (struct chunk_sge *)tmp_ch_ctxt->sge;
svc_rdma_rcl_chunk_counts(ch, &ch_count, &byte_count);
if (ch_count > RPCSVC_MAXPAGES)
return -EINVAL;
sge_count = rdma_rcl_to_sge(xprt, rqstp, hdr_ctxt, rmsgp,
sge, ch_sge_ary,
ch_count, byte_count);