From: Florian Westphal <fw@xxxxxxxxx>
This is a very conservative limit (134217728 rules), but good
enough to not trigger frequent oom from syzkaller.
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
net/netfilter/x_tables.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
index dc68ac49614a..01f8e122e74e 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -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);
}
--
2.11.0
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
