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SUNRPC: fix ternary sign expansion bug in tracing

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[ Upstream commit cb579086536f6564f5846f89808ec394ef8b8621 ]

This code is supposed to pass negative "err" values for tracing but it
passes positive values instead.  The problem is that the
trace_svcsock_tcp_send() function takes a long but "err" is an int and
"sent" is a u32.  The negative is first type promoted to u32 so it
becomes a high positive then it is promoted to long and it stays
positive.

Fix this by casting "err" directly to long.

Fixes: 998024dee197 ("SUNRPC: Add more svcsock tracepoints")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter 2021-04-22 12:14:37 +03:00 committed by Greg Kroah-Hartman
parent dd41a0e515
commit 0a9decf2dd
1 changed files with 1 additions and 1 deletions
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2
net/sunrpc/svcsock.c
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@ -1176,7 +1176,7 @@ static int svc_tcp_sendto(struct svc_rqst *rqstp)
goto out_notconn;
err = svc_tcp_sendmsg(svsk->sk_sock, &msg, xdr, marker, &sent);
xdr_free_bvec(xdr);
trace_svcsock_tcp_send(xprt, err < 0 ? err : sent);
trace_svcsock_tcp_send(xprt, err < 0 ? (long)err : sent);
if (err < 0 || sent != (xdr->len + sizeof(marker)))
goto out_close;
mutex_unlock(&xprt->xpt_mutex);