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authorTaehee Yoo <ap420073@gmail.com>2018-06-11 16:16:33 +0300
committerPablo Neira Ayuso <pablo@netfilter.org>2018-06-12 20:30:11 +0300
commitadc972c5b88829d38ede08b1069718661c7330ae (patch)
tree08999defc404d53bfefe492ebb406ece21f87f28 /net
parent0a2cf5ee432c2e8718af3553a56a3760d767b736 (diff)
downloadlinux-adc972c5b88829d38ede08b1069718661c7330ae.tar.xz
netfilter: nf_tables: use WARN_ON_ONCE instead of BUG_ON in nft_do_chain()
When depth of chain is bigger than NFT_JUMP_STACK_SIZE, the nft_do_chain crashes. But there is no need to crash hard here. Suggested-by: Florian Westphal <fw@strlen.de> Signed-off-by: Taehee Yoo <ap420073@gmail.com> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nf_tables_core.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/netfilter/nf_tables_core.c b/net/netfilter/nf_tables_core.c
index deff10adef9c..8de912ca53d3 100644
--- a/net/netfilter/nf_tables_core.c
+++ b/net/netfilter/nf_tables_core.c
@@ -183,7 +183,8 @@ next_rule:
switch (regs.verdict.code) {
case NFT_JUMP:
- BUG_ON(stackptr >= NFT_JUMP_STACK_SIZE);
+ if (WARN_ON_ONCE(stackptr >= NFT_JUMP_STACK_SIZE))
+ return NF_DROP;
jumpstack[stackptr].chain = chain;
jumpstack[stackptr].rules = rules + 1;
stackptr++;