Commit cfb266c0 authored by Yang Hongyang's avatar Yang Hongyang Committed by David S. Miller

ipv6: Fix the return value of Set Hop-by-Hop options header with NULL data pointer

When Set Hop-by-Hop options header with NULL data 
pointer and optlen is not zero use setsockopt(),
the kernel successfully return 0 instead of 
return error EINVAL or EFAULT.

This patch fix the problem.
Signed-off-by: default avatarYang Hongyang <yanghy@cn.fujitsu.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1730554f
......@@ -346,6 +346,8 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
*/
if (optlen == 0)
optval = NULL;
else if (optval == NULL)
goto e_inval;
else if (optlen < sizeof(struct ipv6_opt_hdr) ||
optlen & 0x7 || optlen > 8 * 255)
goto e_inval;
......
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