diff options
| author | Florian Westphal <fw@strlen.de> | 2018-03-10 03:15:45 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-08 12:49:45 +0300 |
| commit | 42b41149e2459edb50d583ac732b4941d898bae8 (patch) | |
| tree | dad574a830c16b24305e1d6d314744a256391f4c /net/netfilter/xt_hashlimit.c | |
| parent | 63d1e53df8de96085e423a973bb557d6d6b350f3 (diff) | |
| download | linux-42b41149e2459edb50d583ac732b4941d898bae8.tar.xz | |
netfilter: x_tables: add and use xt_check_proc_name
commit b1d0a5d0cba4597c0394997b2d5fced3e3841b4e upstream.
recent and hashlimit both create /proc files, but only check that
name is 0 terminated.
This can trigger WARN() from procfs when name is "" or "/".
Add helper for this and then use it for both.
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Reported-by: <syzbot+0502b00edac2a0680b61@syzkaller.appspotmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/netfilter/xt_hashlimit.c')
| -rw-r--r-- | net/netfilter/xt_hashlimit.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c index 05fbc2a0be46..1667ebbb4a0e 100644 --- a/net/netfilter/xt_hashlimit.c +++ b/net/netfilter/xt_hashlimit.c @@ -668,8 +668,9 @@ static int hashlimit_mt_check(const struct xt_mtchk_param *par) if (info->cfg.gc_interval == 0 || info->cfg.expire == 0) return -EINVAL; - if (info->name[sizeof(info->name)-1] != '\0') - return -EINVAL; + ret = xt_check_proc_name(info->name, sizeof(info->name)); + if (ret) + return ret; if (par->family == NFPROTO_IPV4) { if (info->cfg.srcmask > 32 || info->cfg.dstmask > 32) return -EINVAL; |