diff options
| author | Willem de Bruijn <willemb@google.com> | 2017-01-02 17:19:43 -0500 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2017-01-09 17:24:54 +0100 |
| commit | 244b531bee2bdcfcd35ca2fff9cc7d073b3aa060 (patch) | |
| tree | 61d53d7913e67140f6f459f22f5b474ec83cd0dd /net/ipv4/netfilter | |
| parent | e47ddb2c4691fd2bd8d25745ecb6848408899757 (diff) | |
| download | linux-244b531bee2bdcfcd35ca2fff9cc7d073b3aa060.tar.gz linux-244b531bee2bdcfcd35ca2fff9cc7d073b3aa060.tar.xz | |
arptables: use match, target and data copy_to_user helpers
Convert arptables 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/netfilter')
| -rw-r--r-- | net/ipv4/netfilter/arp_tables.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c index a467e1236c43..6241a81fd7f5 100644 --- a/net/ipv4/netfilter/arp_tables.c +++ b/net/ipv4/netfilter/arp_tables.c @@ -677,11 +677,6 @@ static int copy_entries_to_user(unsigned int total_size, return PTR_ERR(counters); loc_cpu_entry = private->entries; - /* ... then copy entire thing ... */ - 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 */ @@ -689,6 +684,10 @@ static int copy_entries_to_user(unsigned int total_size, const struct xt_entry_target *t; e = (struct arpt_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 arpt_entry, counters), &counters[num], @@ -698,11 +697,7 @@ static int copy_entries_to_user(unsigned int total_size, } t = arpt_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; } |