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 13:43:40 -0700 |
| commit | d3c48151512922dd35f1f393b30b9138e4441d14 (patch) | |
| tree | f283952cf8a17bf8ecca6c4f11aab2252aaa8b46 /net/ipv4 | |
| parent | net: make sockptr_is_null strict aliasing safe (diff) | |
| download | wireguard-linux-d3c48151512922dd35f1f393b30b9138e4441d14.tar.xz wireguard-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/ipv4')
| -rw-r--r-- | net/ipv4/netfilter/arp_tables.c | 8 | ||||
| -rw-r--r-- | net/ipv4/netfilter/ip_tables.c | 8 | ||||
| -rw-r--r-- | net/ipv4/tcp.c | 5 |
3 files changed, 11 insertions, 10 deletions
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c index 9a1567dbc022..d1e04d2b5170 100644 --- a/net/ipv4/netfilter/arp_tables.c +++ b/net/ipv4/netfilter/arp_tables.c @@ -971,8 +971,8 @@ static int do_replace(struct net *net, sockptr_t arg, unsigned int len) return -ENOMEM; loc_cpu_entry = newinfo->entries; - sockptr_advance(arg, sizeof(tmp)); - if (copy_from_sockptr(loc_cpu_entry, arg, tmp.size) != 0) { + if (copy_from_sockptr_offset(loc_cpu_entry, arg, sizeof(tmp), + tmp.size) != 0) { ret = -EFAULT; goto free_newinfo; } @@ -1267,8 +1267,8 @@ static int compat_do_replace(struct net *net, sockptr_t arg, unsigned int len) return -ENOMEM; loc_cpu_entry = newinfo->entries; - sockptr_advance(arg, sizeof(tmp)); - if (copy_from_sockptr(loc_cpu_entry, arg, tmp.size) != 0) { + if (copy_from_sockptr_offset(loc_cpu_entry, arg, sizeof(tmp), + tmp.size) != 0) { ret = -EFAULT; goto free_newinfo; } diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c index f2a9680303d8..f15bc21d7301 100644 --- a/net/ipv4/netfilter/ip_tables.c +++ b/net/ipv4/netfilter/ip_tables.c @@ -1126,8 +1126,8 @@ do_replace(struct net *net, sockptr_t arg, unsigned int len) return -ENOMEM; loc_cpu_entry = newinfo->entries; - sockptr_advance(arg, sizeof(tmp)); - if (copy_from_sockptr(loc_cpu_entry, arg, tmp.size) != 0) { + if (copy_from_sockptr_offset(loc_cpu_entry, arg, sizeof(tmp), + tmp.size) != 0) { ret = -EFAULT; goto free_newinfo; } @@ -1508,8 +1508,8 @@ compat_do_replace(struct net *net, sockptr_t arg, unsigned int len) return -ENOMEM; loc_cpu_entry = newinfo->entries; - sockptr_advance(arg, sizeof(tmp)); - if (copy_from_sockptr(loc_cpu_entry, arg, tmp.size) != 0) { + if (copy_from_sockptr_offset(loc_cpu_entry, arg, sizeof(tmp), + tmp.size) != 0) { ret = -EFAULT; goto free_newinfo; } diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 27de9380ed14..4afec552f211 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2801,12 +2801,13 @@ static int tcp_repair_options_est(struct sock *sk, sockptr_t optbuf, { struct tcp_sock *tp = tcp_sk(sk); struct tcp_repair_opt opt; + size_t offset = 0; while (len >= sizeof(opt)) { - if (copy_from_sockptr(&opt, optbuf, sizeof(opt))) + if (copy_from_sockptr_offset(&opt, optbuf, offset, sizeof(opt))) return -EFAULT; - sockptr_advance(optbuf, sizeof(opt)); + offset += sizeof(opt); len -= sizeof(opt); switch (opt.opt_code) { |