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authorChristoph Hellwig <hch@lst.de>2020-07-19 10:21:57 +0300
committerDavid S. Miller <davem@davemloft.net>2020-07-20 04:26:42 +0300
commit07e5035c6f1377e0f07d9dcaa1724c97ac56f543 (patch)
treed71f437dfdb8a232c030634f776f5f220f274bb6 /net/sctp
parentdcd0357580cde2d058b50037c38ec499e7745497 (diff)
downloadlinux-07e5035c6f1377e0f07d9dcaa1724c97ac56f543.tar.xz
sctp: pass a kernel pointer to sctp_setsockopt_adaptation_layer
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>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/socket.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index cc7d5430ad88..b29452f58ff9 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -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);