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authorChristoph Hellwig <hch@lst.de>2020-07-19 10:22:13 +0300
committerDavid S. Miller <davem@davemloft.net>2020-07-20 04:26:43 +0300
commitac37435bfe9e09fc107daf6eddb57831b5961708 (patch)
tree49ee1c4266052b22c5d76d663a6a96c572968b56 /net/sctp/socket.c
parent4a97fa4f099b9ac82d0e0adbd2f63fccf3dd96fc (diff)
downloadlinux-ac37435bfe9e09fc107daf6eddb57831b5961708.tar.xz
sctp: pass a kernel pointer to sctp_setsockopt_default_prinfo
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/socket.c')
-rw-r--r--net/sctp/socket.c45
1 files changed, 20 insertions, 25 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 245186327896..0eeb6e6162ad 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3944,55 +3944,50 @@ static int sctp_setsockopt_pr_supported(struct sock *sk,
}
static int sctp_setsockopt_default_prinfo(struct sock *sk,
- char __user *optval,
+ struct sctp_default_prinfo *info,
unsigned int optlen)
{
struct sctp_sock *sp = sctp_sk(sk);
- struct sctp_default_prinfo info;
struct sctp_association *asoc;
int retval = -EINVAL;
- if (optlen != sizeof(info))
- goto out;
-
- if (copy_from_user(&info, optval, sizeof(info))) {
- retval = -EFAULT;
+ if (optlen != sizeof(*info))
goto out;
- }
- if (info.pr_policy & ~SCTP_PR_SCTP_MASK)
+ if (info->pr_policy & ~SCTP_PR_SCTP_MASK)
goto out;
- if (info.pr_policy == SCTP_PR_SCTP_NONE)
- info.pr_value = 0;
+ if (info->pr_policy == SCTP_PR_SCTP_NONE)
+ info->pr_value = 0;
- asoc = sctp_id2assoc(sk, info.pr_assoc_id);
- if (!asoc && info.pr_assoc_id > SCTP_ALL_ASSOC &&
+ asoc = sctp_id2assoc(sk, info->pr_assoc_id);
+ if (!asoc && info->pr_assoc_id > SCTP_ALL_ASSOC &&
sctp_style(sk, UDP))
goto out;
retval = 0;
if (asoc) {
- SCTP_PR_SET_POLICY(asoc->default_flags, info.pr_policy);
- asoc->default_timetolive = info.pr_value;
+ SCTP_PR_SET_POLICY(asoc->default_flags, info->pr_policy);
+ asoc->default_timetolive = info->pr_value;
goto out;
}
if (sctp_style(sk, TCP))
- info.pr_assoc_id = SCTP_FUTURE_ASSOC;
+ info->pr_assoc_id = SCTP_FUTURE_ASSOC;
- if (info.pr_assoc_id == SCTP_FUTURE_ASSOC ||
- info.pr_assoc_id == SCTP_ALL_ASSOC) {
- SCTP_PR_SET_POLICY(sp->default_flags, info.pr_policy);
- sp->default_timetolive = info.pr_value;
+ if (info->pr_assoc_id == SCTP_FUTURE_ASSOC ||
+ info->pr_assoc_id == SCTP_ALL_ASSOC) {
+ SCTP_PR_SET_POLICY(sp->default_flags, info->pr_policy);
+ sp->default_timetolive = info->pr_value;
}
- if (info.pr_assoc_id == SCTP_CURRENT_ASSOC ||
- info.pr_assoc_id == SCTP_ALL_ASSOC) {
+ if (info->pr_assoc_id == SCTP_CURRENT_ASSOC ||
+ info->pr_assoc_id == SCTP_ALL_ASSOC) {
list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
- SCTP_PR_SET_POLICY(asoc->default_flags, info.pr_policy);
- asoc->default_timetolive = info.pr_value;
+ SCTP_PR_SET_POLICY(asoc->default_flags,
+ info->pr_policy);
+ asoc->default_timetolive = info->pr_value;
}
}
@@ -4690,7 +4685,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_pr_supported(sk, kopt, optlen);
break;
case SCTP_DEFAULT_PRINFO:
- retval = sctp_setsockopt_default_prinfo(sk, optval, optlen);
+ retval = sctp_setsockopt_default_prinfo(sk, kopt, optlen);
break;
case SCTP_RECONFIG_SUPPORTED:
retval = sctp_setsockopt_reconfig_supported(sk, optval, optlen);