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authorSabrina Dubroca <sd@queasysnail.net>2014-02-06 18:34:12 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-03-06 21:30:03 -0800
commit8ca9995116f49227a19da4cd3518c735ac609528 (patch)
tree05852661df7cbc02ab8b2c3d32a2f3fc23a599d1
parent14bc205c25fa43583e4ad91f3400ab23db4e3d8a (diff)
downloadlinux-linaro-stable-8ca9995116f49227a19da4cd3518c735ac609528.tar.gz
netpoll: fix netconsole IPv6 setup
[ 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@queasysnail.net> Acked-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--net/core/netpoll.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 27f33f25cda8..433a1051d323 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -948,6 +948,7 @@ 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)
@@ -960,6 +961,7 @@ 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;
@@ -1002,7 +1004,7 @@ 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;