diff options
| author | Florian Westphal <fw@strlen.de> | 2021-04-26 12:14:40 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2021-04-26 18:16:56 +0200 |
| commit | 47a6959fa331fe892a4fc3b48ca08e92045c6bda (patch) | |
| tree | 02aaee18c39de580c05dc3bb186a3e642200b81d /include/linux/netfilter | |
| parent | 50f2db9e368f73ecbbaa92da365183fa953aaba7 (diff) | |
netfilter: allow to turn off xtables compat layer
The compat layer needs to parse untrusted input (the ruleset)
to translate it to a 64bit compatible format.
We had a number of bugs in this department in the past, so allow users
to turn this feature off.
Add CONFIG_NETFILTER_XTABLES_COMPAT kconfig knob and make it default to y
to keep existing behaviour.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/linux/netfilter')
| -rw-r--r-- | include/linux/netfilter/x_tables.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h index a52cc22f806a..07c6ad8f2a02 100644 --- a/include/linux/netfilter/x_tables.h +++ b/include/linux/netfilter/x_tables.h @@ -158,7 +158,7 @@ struct xt_match { /* Called when entry of this type deleted. */ void (*destroy)(const struct xt_mtdtor_param *); -#ifdef CONFIG_COMPAT +#ifdef CONFIG_NETFILTER_XTABLES_COMPAT /* Called when userspace align differs from kernel space one */ void (*compat_from_user)(void *dst, const void *src); int (*compat_to_user)(void __user *dst, const void *src); @@ -169,7 +169,7 @@ struct xt_match { const char *table; unsigned int matchsize; unsigned int usersize; -#ifdef CONFIG_COMPAT +#ifdef CONFIG_NETFILTER_XTABLES_COMPAT unsigned int compatsize; #endif unsigned int hooks; @@ -199,7 +199,7 @@ struct xt_target { /* Called when entry of this type deleted. */ void (*destroy)(const struct xt_tgdtor_param *); -#ifdef CONFIG_COMPAT +#ifdef CONFIG_NETFILTER_XTABLES_COMPAT /* Called when userspace align differs from kernel space one */ void (*compat_from_user)(void *dst, const void *src); int (*compat_to_user)(void __user *dst, const void *src); @@ -210,7 +210,7 @@ struct xt_target { const char *table; unsigned int targetsize; unsigned int usersize; -#ifdef CONFIG_COMPAT +#ifdef CONFIG_NETFILTER_XTABLES_COMPAT unsigned int compatsize; #endif unsigned int hooks; @@ -452,7 +452,7 @@ xt_get_per_cpu_counter(struct xt_counters *cnt, unsigned int cpu) struct nf_hook_ops *xt_hook_ops_alloc(const struct xt_table *, nf_hookfn *); -#ifdef CONFIG_COMPAT +#ifdef CONFIG_NETFILTER_XTABLES_COMPAT #include <net/compat.h> struct compat_xt_entry_match { @@ -533,5 +533,5 @@ int xt_compat_check_entry_offsets(const void *base, const char *elems, unsigned int target_offset, unsigned int next_offset); -#endif /* CONFIG_COMPAT */ +#endif /* CONFIG_NETFILTER_XTABLES_COMPAT */ #endif /* _X_TABLES_H */ |