unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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sctp: pass a kernel pointer to sctp_setsockopt_adaptation_layer

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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 09:21:57 +02:00 committed by David S. Miller
parent dcd0357580
commit 07e5035c6f
1 changed files with 4 additions and 7 deletions
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11
net/sctp/socket.c
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@ -3336,17 +3336,14 @@ static int sctp_setsockopt_peer_primary_addr(struct sock *sk,
return err;
}
static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval,
static int sctp_setsockopt_adaptation_layer(struct sock *sk,
struct sctp_setadaptation *adapt,
unsigned int optlen)
{
struct sctp_setadaptation adaptation;
if (optlen != sizeof(struct sctp_setadaptation))
return -EINVAL;
if (copy_from_user(&adaptation, optval, optlen))
return -EFAULT;
sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind;
sctp_sk(sk)->adaptation_ind = adapt->ssb_adaptation_ind;
return 0;
}
@ -4700,7 +4697,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_maxseg(sk, kopt, optlen);
break;
case SCTP_ADAPTATION_LAYER:
retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen);
retval = sctp_setsockopt_adaptation_layer(sk, kopt, optlen);
break;
case SCTP_CONTEXT:
retval = sctp_setsockopt_context(sk, optval, optlen);