Re: [PATCH] netlink: Don't shift on 64 for ngroups

5 Aug 2018


      From: Dmitry Safonov dima@arista.com
Date: Sun,  5 Aug 2018 00:55:44 +0100
...
@@ -1011,8 +1011,8 @@ static int netlink_bind(struct socket *sock, struct sockaddr *addr,
 
   if (nlk->ngroups == 0)
   	groups = 0;

else
groups &= (1ULL << nlk->ngroups) - 1;




else if (nlk->ngroups < sizeof(long unsigned int))
groups &= (1UL << nlk->ngroups) - 1;



Sizeof is in bytes, you want to compare against bits.

    