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platform_kernel-5.15
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sctp: pass a kernel pointer to sctp_setsockopt_disable_fragments 

Use the kernel pointer that sctp_setsockopt has available instead of
directly handling the user pointer.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2020-07-19 09:21:41 +02:00 committed by David S. Miller
parent ce5b2f8929
commit 1083582558
1 changed files with 3 additions and 11 deletions
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14
net/sctp/socket.c
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@ -2184,20 +2184,12 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
* exceeds the current PMTU size, the message will NOT be sent and
* instead a error will be indicated to the user.
*/
static int sctp_setsockopt_disable_fragments(struct sock *sk,
char __user *optval,
static int sctp_setsockopt_disable_fragments(struct sock *sk, int *val,
unsigned int optlen)
{
int val;
if (optlen < sizeof(int))
return -EINVAL;
if (get_user(val, (int __user *)optval))
return -EFAULT;
sctp_sk(sk)->disable_fragments = (val == 0) ? 0 : 1;
sctp_sk(sk)->disable_fragments = (*val == 0) ? 0 : 1;
return 0;
}
@ -4701,7 +4693,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
break;
case SCTP_DISABLE_FRAGMENTS:
retval = sctp_setsockopt_disable_fragments(sk, optval, optlen);
retval = sctp_setsockopt_disable_fragments(sk, kopt, optlen);
break;
case SCTP_EVENTS: