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Commit 43727da9 authored by Al Viro's avatar Al Viro
Browse files

do_ipv6_setsockopt(): don't open-code memdup_user() 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent aa47cc1c

net/ipv6/ipv6_sockglue.c

+3 −8
Original line number Diff line number Diff line
@@ -735,14 +735,9 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 
			retv = -ENOBUFS;

			break;

		}

		gsf = kmalloc(optlen, GFP_KERNEL);

		if (!gsf) {

			retv = -ENOBUFS;

			break;

		}

		retv = -EFAULT;

		if (copy_from_user(gsf, optval, optlen)) {

			kfree(gsf);

		gsf = memdup_user(optval, optlen);

		if (IS_ERR(gsf)) {

			retv = PTR_ERR(gsf);

			break;

		}

		/* numsrc >= (4G-140)/128 overflow in 32 bits */