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authorChristoph Hellwig <hch@lst.de>2020-07-19 10:22:08 +0300
committerDavid S. Miller <davem@davemloft.net>2020-07-20 04:26:43 +0300
commitc9abc2c1c2973a30750fa00bfc912b683d88d1bc (patch)
treeaefb7af8f193f8527dc977af87e1173b0b9933f0 /net/sctp
parent76b3d0c4455b61f74301a1aae2dcdc243921f379 (diff)
downloadlinux-c9abc2c1c2973a30750fa00bfc912b683d88d1bc.tar.xz
sctp: pass a kernel pointer to sctp_setsockopt_auto_asconf
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.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index ab155c15939e..64f2a967ddf5 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3807,26 +3807,23 @@ static int sctp_setsockopt_deactivate_key(struct sock *sk,
* Note. In this implementation, socket operation overrides default parameter
* being set by sysctl as well as FreeBSD implementation
*/
-static int sctp_setsockopt_auto_asconf(struct sock *sk, char __user *optval,
+static int sctp_setsockopt_auto_asconf(struct sock *sk, int *val,
unsigned int optlen)
{
- int val;
struct sctp_sock *sp = sctp_sk(sk);
if (optlen < sizeof(int))
return -EINVAL;
- if (get_user(val, (int __user *)optval))
- return -EFAULT;
- if (!sctp_is_ep_boundall(sk) && val)
+ if (!sctp_is_ep_boundall(sk) && *val)
return -EINVAL;
- if ((val && sp->do_auto_asconf) || (!val && !sp->do_auto_asconf))
+ if ((*val && sp->do_auto_asconf) || (!*val && !sp->do_auto_asconf))
return 0;
spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock);
- if (val == 0 && sp->do_auto_asconf) {
+ if (*val == 0 && sp->do_auto_asconf) {
list_del(&sp->auto_asconf_list);
sp->do_auto_asconf = 0;
- } else if (val && !sp->do_auto_asconf) {
+ } else if (*val && !sp->do_auto_asconf) {
list_add_tail(&sp->auto_asconf_list,
&sock_net(sk)->sctp.auto_asconf_splist);
sp->do_auto_asconf = 1;
@@ -4690,7 +4687,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_deactivate_key(sk, kopt, optlen);
break;
case SCTP_AUTO_ASCONF:
- retval = sctp_setsockopt_auto_asconf(sk, optval, optlen);
+ retval = sctp_setsockopt_auto_asconf(sk, kopt, optlen);
break;
case SCTP_PEER_ADDR_THLDS:
retval = sctp_setsockopt_paddr_thresholds(sk, optval, optlen,