From: Nathan Chancellor <redacted>
Date: Sat, 4 Aug 2018 16:21:02 -0700

On Sun, Aug 05, 2018 at 12:12:02AM +0100, Dmitry Safonov wrote:

quoted

On Sat, 2018-08-04 at 15:49 -0700, Nathan Chancellor wrote:

quoted

dmesg output attached, please let me know if you need anything else.

Could you try with this diff instead?
It looks like, I'm too bad with shifts and shifted for 64 bytes.

-- 
Thanks,
             Dmitry

quoted

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 7d860a22e5fb..b78bb7dc06fe 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c

@@ -1011,7 +1011,7 @@ static int netlink_bind(struct socket *sock, struct sockaddr *addr,
 
 	if (nlk->ngroups == 0)
 		groups = 0;
-	else
+	else if (nlk->ngroups < 64)
 		groups &= (1ULL << nlk->ngroups) - 1;
 
 	bound = nlk->bound;

This fixed my issue. If needed:

Tested-by: Nathan Chancellor <redacted>

Dmitry please submit this formally for net+stable wit Nathan's
tested-by.

Thanks.