Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Note that the get case is pretty weird in that it actually copies data
back to userspace from setsockopt.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
include/net/ipv6.h | 2 +-
net/ipv6/ip6_flowlabel.c | 16 +++++++++-------
net/ipv6/ipv6_sockglue.c | 2 +-
3 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 262fc88dbd7e2f..4c9d89b5d73268 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -406,7 +406,7 @@ struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space,
struct ip6_flowlabel *fl,
struct ipv6_txoptions *fopt);
void fl6_free_socklist(struct sock *sk);
-int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
+int ipv6_flowlabel_opt(struct sock *sk, sockptr_t optval, int optlen);
int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,
int flags);
int ip6_flowlabel_init(void);
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index 27ee6de9beffc4..6b3c315f3d461a 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -371,7 +371,7 @@ static int fl6_renew(struct ip6_flowlabel *fl, unsigned long linger, unsigned lo
static struct ip6_flowlabel *
fl_create(struct net *net, struct sock *sk, struct in6_flowlabel_req *freq,
- char __user *optval, int optlen, int *err_p)
+ sockptr_t optval, int optlen, int *err_p)
{
struct ip6_flowlabel *fl = NULL;
int olen;
@@ -401,7 +401,8 @@ fl_create(struct net *net, struct sock *sk, struct in6_flowlabel_req *freq,
memset(fl->opt, 0, sizeof(*fl->opt));
fl->opt->tot_len = sizeof(*fl->opt) + olen;
err = -EFAULT;
- if (copy_from_user(fl->opt+1, optval+CMSG_ALIGN(sizeof(*freq)), olen))
+ sockptr_advance(optval, CMSG_ALIGN(sizeof(*freq)));
+ if (copy_from_sockptr(fl->opt + 1, optval, olen))
goto done;
msg.msg_controllen = olen;
@@ -604,7 +605,7 @@ static int ipv6_flowlabel_renew(struct sock *sk, struct in6_flowlabel_req *freq)
}
static int ipv6_flowlabel_get(struct sock *sk, struct in6_flowlabel_req *freq,
- void __user *optval, int optlen)
+ sockptr_t optval, int optlen)
{
struct ipv6_fl_socklist *sfl, *sfl1 = NULL;
struct ip6_flowlabel *fl, *fl1 = NULL;
@@ -702,8 +703,9 @@ static int ipv6_flowlabel_get(struct sock *sk, struct in6_flowlabel_req *freq,
goto recheck;
if (!freq->flr_label) {
- if (copy_to_user(&((struct in6_flowlabel_req __user *) optval)->flr_label,
- &fl->label, sizeof(fl->label))) {
+ sockptr_advance(optval,
+ offsetof(struct in6_flowlabel_req, flr_label));
+ if (copy_to_sockptr(optval, &fl->label, sizeof(fl->label))) {
/* Intentionally ignore fault. */
}
}
@@ -716,13 +718,13 @@ static int ipv6_flowlabel_get(struct sock *sk, struct in6_flowlabel_req *freq,
return err;
}
-int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen)
+int ipv6_flowlabel_opt(struct sock *sk, sockptr_t optval, int optlen)
{
struct in6_flowlabel_req freq;
if (optlen < sizeof(freq))
return -EINVAL;
- if (copy_from_user(&freq, optval, sizeof(freq)))
+ if (copy_from_sockptr(&freq, optval, sizeof(freq)))
return -EFAULT;
switch (freq.flr_action) {
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 119dfaf5f4bb26..3897fb55372d38 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -929,7 +929,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
retv = 0;
break;
case IPV6_FLOWLABEL_MGR:
- retv = ipv6_flowlabel_opt(sk, optval, optlen);
+ retv = ipv6_flowlabel_opt(sk, USER_SOCKPTR(optval), optlen);
break;
case IPV6_IPSEC_POLICY:
case IPV6_XFRM_POLICY:
--
2.27.0
