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authorTom Tucker <tom@opengridcomputing.com>2008-05-13 09:16:05 -0500
committerTom Tucker <tom@opengridcomputing.com>2008-05-19 07:34:02 -0500
commita6f911c04e20b98feb4b33d3aba2976851977d6a (patch)
tree54a34d7007ca8d1d39f55396e2d084f6f9310e91
parent008fdbc57164b0ac237ad6ee2766944f02ac9c28 (diff)
svcrdma: Verify read-list fits within RPCSVC_MAXPAGES
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>
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_recvfrom.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index 6b16d8cd568..06ab4841537 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -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);