[PATCH] netfilter: nf_conntrack_sip: fix the ct_sip_parse_numerical_param() return value.

[Gavrilov Ilia]

ct_sip_parse_numerical_param() returns only 0 or 1 now.
But process_register_request() and process_register_response() imply
checking for a negative value if parsing of a numerical header parameter
failed. Let's fix it.

Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with SVACE.

Fixes: 0f32a40fc91a ("[NETFILTER]: nf_conntrack_sip: create signalling expectations")
Signed-off-by: Ilia.Gavrilov <Ilia.Gavrilov@xxxxxxxxxxx>
---
 net/netfilter/nf_conntrack_sip.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 77f5e82d8e3f..d0eac27f6ba0 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -611,7 +611,7 @@ int ct_sip_parse_numerical_param(const struct nf_conn *ct, const char *dptr,
 	start += strlen(name);
 	*val = simple_strtoul(start, &end, 0);
 	if (start == end)
-		return 0;
+		return -1;
 	if (matchoff && matchlen) {
 		*matchoff = start - dptr;
 		*matchlen = end - start;
-- 
2.30.2