[PATCH] sunrpc: fix prog selection loop in svc_process_common

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If the rq_prog is not in the list of programs, then we use the last
program in the list and subsequent tests on 'progp' being NULL are
useless.

We should only assign progp when we find the right program, and we
should initialize it to NULL

Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Fixes: 86ab08beb3f0 ("SUNRPC: replace program list with program array")
Signed-off-by: NeilBrown <neilb@xxxxxxx>
---
 net/sunrpc/svc.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 7e7f4e0390c7..79879b7d39cb 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -1321,7 +1321,7 @@ static int
 svc_process_common(struct svc_rqst *rqstp)
 {
 	struct xdr_stream	*xdr = &rqstp->rq_res_stream;
-	struct svc_program	*progp;
+	struct svc_program	*progp = NULL;
 	const struct svc_procedure *procp = NULL;
 	struct svc_serv		*serv = rqstp->rq_server;
 	struct svc_process_info process;
@@ -1351,12 +1351,9 @@ svc_process_common(struct svc_rqst *rqstp)
 	rqstp->rq_vers = be32_to_cpup(p++);
 	rqstp->rq_proc = be32_to_cpup(p);
 
-	for (pr = 0; pr < serv->sv_nprogs; pr++) {
-		progp = &serv->sv_programs[pr];
-
-		if (rqstp->rq_prog == progp->pg_prog)
-			break;
-	}
+	for (pr = 0; pr < serv->sv_nprogs; pr++)
+		if (rqstp->rq_prog == serv->sv_programs[pr].pg_prog)
+			progp = &serv->sv_programs[pr];
 
 	/*
 	 * Decode auth data, and add verifier to reply buffer.
-- 
2.46.0





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