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authorChristoph Hellwig <hch@lst.de>2020-07-19 10:22:23 +0300
committerDavid S. Miller <davem@davemloft.net>2020-07-20 04:26:44 +0300
commit565059cb9b24bd7804948802ef38cc99c35c2c64 (patch)
treef50388bc983a57d3119f7b519557f3746aab54cf
parenta42624669e1afd183a82dbfe7cc29cc1a403c1fe (diff)
downloadlinux-565059cb9b24bd7804948802ef38cc99c35c2c64.tar.xz
sctp: pass a kernel pointer to sctp_setsockopt_event
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>
-rw-r--r--net/sctp/socket.c35
1 files changed, 15 insertions, 20 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index a5b95e68cc12..12a33fc42eee 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4252,45 +4252,40 @@ static int sctp_assoc_ulpevent_type_set(struct sctp_event *param,
return 0;
}
-static int sctp_setsockopt_event(struct sock *sk, char __user *optval,
+static int sctp_setsockopt_event(struct sock *sk, struct sctp_event *param,
unsigned int optlen)
{
struct sctp_sock *sp = sctp_sk(sk);
struct sctp_association *asoc;
- struct sctp_event param;
int retval = 0;
- if (optlen < sizeof(param))
+ if (optlen < sizeof(*param))
return -EINVAL;
- optlen = sizeof(param);
- if (copy_from_user(&param, optval, optlen))
- return -EFAULT;
-
- if (param.se_type < SCTP_SN_TYPE_BASE ||
- param.se_type > SCTP_SN_TYPE_MAX)
+ if (param->se_type < SCTP_SN_TYPE_BASE ||
+ param->se_type > SCTP_SN_TYPE_MAX)
return -EINVAL;
- asoc = sctp_id2assoc(sk, param.se_assoc_id);
- if (!asoc && param.se_assoc_id > SCTP_ALL_ASSOC &&
+ asoc = sctp_id2assoc(sk, param->se_assoc_id);
+ if (!asoc && param->se_assoc_id > SCTP_ALL_ASSOC &&
sctp_style(sk, UDP))
return -EINVAL;
if (asoc)
- return sctp_assoc_ulpevent_type_set(&param, asoc);
+ return sctp_assoc_ulpevent_type_set(param, asoc);
if (sctp_style(sk, TCP))
- param.se_assoc_id = SCTP_FUTURE_ASSOC;
+ param->se_assoc_id = SCTP_FUTURE_ASSOC;
- if (param.se_assoc_id == SCTP_FUTURE_ASSOC ||
- param.se_assoc_id == SCTP_ALL_ASSOC)
+ if (param->se_assoc_id == SCTP_FUTURE_ASSOC ||
+ param->se_assoc_id == SCTP_ALL_ASSOC)
sctp_ulpevent_type_set(&sp->subscribe,
- param.se_type, param.se_on);
+ param->se_type, param->se_on);
- if (param.se_assoc_id == SCTP_CURRENT_ASSOC ||
- param.se_assoc_id == SCTP_ALL_ASSOC) {
+ if (param->se_assoc_id == SCTP_CURRENT_ASSOC ||
+ param->se_assoc_id == SCTP_ALL_ASSOC) {
list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
- int ret = sctp_assoc_ulpevent_type_set(&param, asoc);
+ int ret = sctp_assoc_ulpevent_type_set(param, asoc);
if (ret && !retval)
retval = ret;
@@ -4643,7 +4638,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_reuse_port(sk, kopt, optlen);
break;
case SCTP_EVENT:
- retval = sctp_setsockopt_event(sk, optval, optlen);
+ retval = sctp_setsockopt_event(sk, kopt, optlen);
break;
case SCTP_ASCONF_SUPPORTED:
retval = sctp_setsockopt_asconf_supported(sk, optval, optlen);