[PATCH 4.9 253/264] xprtrdma: fix incorrect header size calculations

Greg Kroah-Hartman
2022-06-23T17:15:35Z

From: Colin Ian King <colin.king@canonical.com>

commit 912288442cb2f431bf3c8cb097a5de83bc6dbac1 upstream.

Currently the header size calculations are using an assignment
operator instead of a += operator when accumulating the header
size leading to incorrect sizes. Fix this by using the correct
operator.

Addresses-Coverity: ("Unused value")
Fixes: 302d3deb2068 ("xprtrdma: Prevent inline overflow")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
[bwh: Backported to 4.9: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/sunrpc/xprtrdma/rpc_rdma.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -75,7 +75,7 @@ static unsigned int rpcrdma_max_call_hea

/* Maximum Read list size */
maxsegs += 2; /* segment for head and tail buffers */
- size = maxsegs * sizeof(struct rpcrdma_read_chunk);
+ size += maxsegs * sizeof(struct rpcrdma_read_chunk);

/* Minimal Read chunk size */
size += sizeof(__be32); /* segment count */
@@ -101,7 +101,7 @@ static unsigned int rpcrdma_max_reply_he

/* Maximum Write list size */
maxsegs += 2; /* segment for head and tail buffers */
- size = sizeof(__be32); /* segment count */
+ size += sizeof(__be32); /* segment count */
size += maxsegs * sizeof(struct rpcrdma_segment);
size += sizeof(__be32); /* list discriminator */