net: FIX ipv6_forward sysctl restart
Just returning -ERESTARTSYS without a signal pending is not
good that will just leak it to userspace. We need return
-ERESTARTNOINTR so we always restart and set signal pending
so that we fall of the fast path of syscall return and setup
the system call restart.
So use restart_syscall() which does all of this for us.
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index a8218bc..9eb61c7 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -503,7 +503,7 @@
return 0;
if (!rtnl_trylock())
- return -ERESTARTSYS;
+ return restart_syscall();
if (p == &net->ipv6.devconf_all->forwarding) {
__s32 newf = net->ipv6.devconf_all->forwarding;