On Wed, Jul 4, 2018 at 1:29 AM David Miller [off-list ref] wrote:

From: Paul Moore <redacted>
Date: Mon, 02 Jul 2018 14:20:52 -0400

quoted

-static int ipv6_renew_option(void *ohdr,
-                          struct ipv6_opt_hdr __user *newopt, int newoptlen,
-                          int inherit,
-                          struct ipv6_opt_hdr **hdr,
-                          char **p)
+static void ipv6_renew_option(int renewtype,
+                           struct ipv6_opt_hdr **dest,
+                           struct ipv6_opt_hdr *old,
+                           struct ipv6_opt_hdr *new,
+                           int newtype, char **p)
 {

 ...

quoted

+     p += CMSG_ALIGN(ipv6_optlen(*dest));

I don't think this actually advances the pointer in the caller,
you need something like:

        *p += CMSG_ALIGN(ipv6_optlen(*dest));

Yep, my mistake (typo); thanks for catching it.  Rebuilding a test
kernel now ...

-- 
paul moore
www.paul-moore.com
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