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sctp: pass a kernel pointer to sctp_setsockopt_fragment_interleave

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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 09:21:59 +02:00 committed by David S. Miller
parent 722eca9eca
commit 1031cea001
1 changed files with 3 additions and 8 deletions
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11
net/sctp/socket.c
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@ -3422,18 +3422,13 @@ static int sctp_setsockopt_context(struct sock *sk,
* application using the one to many model may become confused and act
* incorrectly.
*/
static int sctp_setsockopt_fragment_interleave(struct sock *sk,
char __user *optval,
static int sctp_setsockopt_fragment_interleave(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)->frag_interleave = !!val;
sctp_sk(sk)->frag_interleave = !!*val;
if (!sctp_sk(sk)->frag_interleave)
sctp_sk(sk)->ep->intl_enable = 0;
@ -4701,7 +4696,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_context(sk, kopt, optlen);
break;
case SCTP_FRAGMENT_INTERLEAVE:
retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen);
retval = sctp_setsockopt_fragment_interleave(sk, kopt, optlen);
break;
case SCTP_MAX_BURST:
retval = sctp_setsockopt_maxburst(sk, optval, optlen);