net/smc: add error handling for get_user()
For security reasons the return code of get_user() should always be
checked.
Fixes: 01d2f7e2cd
("net/smc: sockopts TCP_NODELAY and TCP_CORK")
Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1456,7 +1456,8 @@ static int smc_setsockopt(struct socket *sock, int level, int optname,
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if (optlen < sizeof(int))
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return -EINVAL;
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get_user(val, (int __user *)optval);
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if (get_user(val, (int __user *)optval))
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return -EFAULT;
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lock_sock(sk);
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switch (optname) {
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