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Commit ac813744 authored by David S. Miller's avatar David S. Miller
Browse files

Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 



Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patch contains Netfilter fixes for your net tree, they are:

1) nf_log_unregister() should only set to NULL the logger that is being
   unregistered, instead of everything else. Patch from Florian Westphal.

2) Fix a crash when accessing physoutdev from PREROUTING in br_netfilter.
   This is partially reverting the patch to shrink nf_bridge_info to 32 bytes.
   Also from Florian.

3) Use existing match/target extensions in the internal nft_compat extension
   lists when the extension is family unspecific (ie. NFPROTO_UNSPEC).

4) Wait for rcu grace period before leaving nf_log_unregister().
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 4e3ae001 ad5001cc

include/linux/skbuff.h

+3 −3
Original line number Diff line number Diff line
@@ -179,6 +179,9 @@ struct nf_bridge_info { 
	u8			bridged_dnat:1;

	__u16			frag_max_size;

	struct net_device	*physindev;



	/* always valid & non-NULL from FORWARD on, for physdev match */

	struct net_device	*physoutdev;

	union {

		/* prerouting: detect dnat in orig/reply direction */

		__be32          ipv4_daddr;
@@ -189,9 +192,6 @@ struct nf_bridge_info { 
		 * skb is out in neigh layer.

		 */

		char neigh_header[8];



		/* always valid & non-NULL from FORWARD on, for physdev match */

		struct net_device *physoutdev;

	};

};

#endif

net/netfilter/nf_log.c

+7 −2
Original line number Diff line number Diff line
@@ -107,12 +107,17 @@ EXPORT_SYMBOL(nf_log_register); 


void nf_log_unregister(struct nf_logger *logger)

{

	const struct nf_logger *log;

	int i;



	mutex_lock(&nf_log_mutex);

	for (i = 0; i < NFPROTO_NUMPROTO; i++)

	for (i = 0; i < NFPROTO_NUMPROTO; i++) {

		log = nft_log_dereference(loggers[i][logger->type]);

		if (log == logger)

			RCU_INIT_POINTER(loggers[i][logger->type], NULL);

	}

	mutex_unlock(&nf_log_mutex);

	synchronize_rcu();

}

EXPORT_SYMBOL(nf_log_unregister);

net/netfilter/nft_compat.c

+18 −6
Original line number Diff line number Diff line
@@ -619,6 +619,13 @@ struct nft_xt { 


static struct nft_expr_type nft_match_type;



static bool nft_match_cmp(const struct xt_match *match,

			  const char *name, u32 rev, u32 family)

{

	return strcmp(match->name, name) == 0 && match->revision == rev &&

	       (match->family == NFPROTO_UNSPEC || match->family == family);

}



static const struct nft_expr_ops *

nft_match_select_ops(const struct nft_ctx *ctx,

		     const struct nlattr * const tb[])
@@ -626,7 +633,7 @@ nft_match_select_ops(const struct nft_ctx *ctx, 
	struct nft_xt *nft_match;

	struct xt_match *match;

	char *mt_name;

	__u32 rev, family;

	u32 rev, family;



	if (tb[NFTA_MATCH_NAME] == NULL ||

	    tb[NFTA_MATCH_REV] == NULL ||
@@ -641,8 +648,7 @@ nft_match_select_ops(const struct nft_ctx *ctx, 
	list_for_each_entry(nft_match, &nft_match_list, head) {

		struct xt_match *match = nft_match->ops.data;



		if (strcmp(match->name, mt_name) == 0 &&

		    match->revision == rev && match->family == family) {

		if (nft_match_cmp(match, mt_name, rev, family)) {

			if (!try_module_get(match->me))

				return ERR_PTR(-ENOENT);
@@ -693,6 +699,13 @@ static LIST_HEAD(nft_target_list); 


static struct nft_expr_type nft_target_type;



static bool nft_target_cmp(const struct xt_target *tg,

			   const char *name, u32 rev, u32 family)

{

	return strcmp(tg->name, name) == 0 && tg->revision == rev &&

	       (tg->family == NFPROTO_UNSPEC || tg->family == family);

}



static const struct nft_expr_ops *

nft_target_select_ops(const struct nft_ctx *ctx,

		      const struct nlattr * const tb[])
@@ -700,7 +713,7 @@ nft_target_select_ops(const struct nft_ctx *ctx, 
	struct nft_xt *nft_target;

	struct xt_target *target;

	char *tg_name;

	__u32 rev, family;

	u32 rev, family;



	if (tb[NFTA_TARGET_NAME] == NULL ||

	    tb[NFTA_TARGET_REV] == NULL ||
@@ -715,8 +728,7 @@ nft_target_select_ops(const struct nft_ctx *ctx, 
	list_for_each_entry(nft_target, &nft_target_list, head) {

		struct xt_target *target = nft_target->ops.data;



		if (strcmp(target->name, tg_name) == 0 &&

		    target->revision == rev && target->family == family) {

		if (nft_target_cmp(target, tg_name, rev, family)) {

			if (!try_module_get(target->me))

				return ERR_PTR(-ENOENT);