From: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
[ Upstream commit 00fe11b3c67dc670fe6391d22f1fe64e7c99a8ec ]
Currently, to make netconsole start over IPv6, the source address
needs to be specified. Without a source address, netpoll_parse_options
assumes we're setting up over IPv4 and the destination IPv6 address is
rejected.
Check if the IP version has been forced by a source address before
checking for a version mismatch when parsing the destination address.
Signed-off-by: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Acked-by: Cong Wang <cwang@xxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
net/core/netpoll.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 0c1482c6ff98..462cdc97fad8 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -943,6 +943,7 @@ int netpoll_parse_options(struct netpoll *np, char *opt)
{
char *cur=opt, *delim;
int ipv6;
+ bool ipversion_set = false;
if (*cur != '@') {
if ((delim = strchr(cur, '@')) == NULL)
@@ -955,6 +956,7 @@ int netpoll_parse_options(struct netpoll *np, char *opt)
cur++;
if (*cur != '/') {
+ ipversion_set = true;
if ((delim = strchr(cur, '/')) == NULL)
goto parse_failed;
*delim = 0;
@@ -997,7 +999,7 @@ int netpoll_parse_options(struct netpoll *np, char *opt)
ipv6 = netpoll_parse_ip_addr(cur, &np->remote_ip);
if (ipv6 < 0)
goto parse_failed;
- else if (np->ipv6 != (bool)ipv6)
+ else if (ipversion_set && np->ipv6 != (bool)ipv6)
goto parse_failed;
else
np->ipv6 = (bool)ipv6;
--
1.9.0
--
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