diff options
| author | Florian Westphal <fw@strlen.de> | 2018-03-10 01:15:45 +0100 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2019-05-03 19:24:42 +0200 |
| commit | de1398c58dd585181e85197d2f03b213a81963b7 (patch) | |
| tree | 57fbbb9e1b5729f97292631c011a7510108ce538 /include | |
| parent | ea415b28db6dcd52aa76a010a8d1659e26fe4eed (diff) | |
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.
Change-Id: I6772510c4de2697a546204cb0d11df406a17e2a1
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>
[bwh: Backported to 3.16:
- xt_hashlimit has only one check function
- Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/netfilter/x_tables.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h index 547a5846e..ee7b41359 100644 --- a/include/linux/netfilter/x_tables.h +++ b/include/linux/netfilter/x_tables.h @@ -248,6 +248,8 @@ extern int xt_check_match(struct xt_mtchk_param *, extern int xt_check_target(struct xt_tgchk_param *, unsigned int size, u_int8_t proto, bool inv_proto); +int xt_check_proc_name(const char *name, unsigned int size); + void *xt_copy_counters_from_user(const void __user *user, unsigned int len, struct xt_counters_info *info, bool compat); |