diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-07-28 18:38:35 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-07-28 22:43:40 +0200 |
| commit | d3c48151512922dd35f1f393b30b9138e4441d14 (patch) | |
| tree | f283952cf8a17bf8ecca6c4f11aab2252aaa8b46 /net/ipv6/ip6_flowlabel.c | |
| parent | net: make sockptr_is_null strict aliasing safe (diff) | |
| download | linux-d3c48151512922dd35f1f393b30b9138e4441d14.tar.xz linux-d3c48151512922dd35f1f393b30b9138e4441d14.zip | |
net: remove sockptr_advance
sockptr_advance never properly worked. Replace it with _offset variants
of copy_from_sockptr and copy_to_sockptr.
Fixes: ba423fdaa589 ("net: add a new sockptr_t type")
Reported-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reported-by: Ido Schimmel <idosch@idosch.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jason A. Donenfeld <Jason@zx2c4.com>
Tested-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_flowlabel.c')
| -rw-r--r-- | net/ipv6/ip6_flowlabel.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c index 215b6f5e733e..2d655260dedc 100644 --- a/net/ipv6/ip6_flowlabel.c +++ b/net/ipv6/ip6_flowlabel.c @@ -401,8 +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; - sockptr_advance(optval, CMSG_ALIGN(sizeof(*freq))); - if (copy_from_sockptr(fl->opt + 1, optval, olen)) + if (copy_from_sockptr_offset(fl->opt + 1, optval, + CMSG_ALIGN(sizeof(*freq)), olen)) goto done; msg.msg_controllen = olen; @@ -703,9 +703,10 @@ release: goto recheck; if (!freq->flr_label) { - sockptr_advance(optval, - offsetof(struct in6_flowlabel_req, flr_label)); - if (copy_to_sockptr(optval, &fl->label, sizeof(fl->label))) { + size_t offset = offsetof(struct in6_flowlabel_req, flr_label); + + if (copy_to_sockptr_offset(optval, offset, &fl->label, + sizeof(fl->label))) { /* Intentionally ignore fault. */ } } |