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Commit 9d5c12a7 authored by Florian Westphal's avatar Florian Westphal Committed by Pablo Neira Ayuso
Browse files

netfilter: x_tables: limit allocation requests for blob rule heads 



This is a very conservative limit (134217728 rules), but good
enough to not trigger frequent oom from syzkaller.

Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent 19926968

net/netfilter/x_tables.c

+3 −0
Original line number Diff line number Diff line
@@ -894,6 +894,9 @@ EXPORT_SYMBOL(xt_check_entry_offsets); 
 */

unsigned int *xt_alloc_entry_offsets(unsigned int size)

{

	if (size > XT_MAX_TABLE_SIZE / sizeof(unsigned int))

		return NULL;



	return kvmalloc_array(size, sizeof(unsigned int), GFP_KERNEL | __GFP_ZERO);



}