From 86298285c9ae3a41ce21c2d00ebdde51dd2abc73 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 23 Jul 2020 08:09:01 +0200 Subject: net/ipv6: switch ipv6_flowlabel_opt to sockptr_t 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 Signed-off-by: David S. Miller --- net/ipv6/ip6_flowlabel.c | 16 +++++++++------- net/ipv6/ipv6_sockglue.c | 2 +- 2 files changed, 10 insertions(+), 8 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c index 817b4f379009..215b6f5e733e 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 @@ release: 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 @@ done: 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 119dfaf5f4bb..3897fb55372d 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -929,7 +929,7 @@ done: 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: -- cgit v1.2.3-58-ga151