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| author | Willem de Bruijn <willemb@google.com> | 2017-01-02 17:19:41 -0500 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2017-01-09 17:24:53 +0100 |
| commit | f77bc5b23fb1af51fc0faa8a479dea8969eb5079 (patch) | |
| tree | be0bea6d3aa34fb6d265a8e8eead1a7deb87622a /net/ipv4 | |
| parent | f32815d21d4d8287336fb9cef4d2d9e0866214c2 (diff) | |
| download | linux-f77bc5b23fb1af51fc0faa8a479dea8969eb5079.tar.gz linux-f77bc5b23fb1af51fc0faa8a479dea8969eb5079.tar.xz | |
iptables: use match, target and data copy_to_user helpers
Convert iptables to copying entries, matches and targets one by one,
using the xt_match_to_user and xt_target_to_user helper functions.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/netfilter/ip_tables.c | 21 |
1 files changed, 6 insertions, 15 deletions
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c index 91656a1d8fbd..384b85713e06 100644 --- a/net/ipv4/netfilter/ip_tables.c +++ b/net/ipv4/netfilter/ip_tables.c @@ -826,10 +826,6 @@ copy_entries_to_user(unsigned int total_size, return PTR_ERR(counters); loc_cpu_entry = private->entries; - if (copy_to_user(userptr, loc_cpu_entry, total_size) != 0) { - ret = -EFAULT; - goto free_counters; - } /* FIXME: use iterator macros --RR */ /* ... then go back and fix counters and names */ @@ -839,6 +835,10 @@ copy_entries_to_user(unsigned int total_size, const struct xt_entry_target *t; e = (struct ipt_entry *)(loc_cpu_entry + off); + if (copy_to_user(userptr + off, e, sizeof(*e))) { + ret = -EFAULT; + goto free_counters; + } if (copy_to_user(userptr + off + offsetof(struct ipt_entry, counters), &counters[num], @@ -852,23 +852,14 @@ copy_entries_to_user(unsigned int total_size, i += m->u.match_size) { m = (void *)e + i; - if (copy_to_user(userptr + off + i - + offsetof(struct xt_entry_match, - u.user.name), - m->u.kernel.match->name, - strlen(m->u.kernel.match->name)+1) - != 0) { + if (xt_match_to_user(m, userptr + off + i)) { ret = -EFAULT; goto free_counters; } } t = ipt_get_target_c(e); - if (copy_to_user(userptr + off + e->target_offset - + offsetof(struct xt_entry_target, - u.user.name), - t->u.kernel.target->name, - strlen(t->u.kernel.target->name)+1) != 0) { + if (xt_target_to_user(t, userptr + off + e->target_offset)) { ret = -EFAULT; goto free_counters; } |