diff options
| author | Taehee Yoo <ap420073@gmail.com> | 2018-06-11 22:16:33 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-08 15:32:21 +0200 |
| commit | 012007a1dd19a437583a7b45018aaef14642093c (patch) | |
| tree | df1beabe70fae490d281f2152423dd2217b2d87e | |
| parent | 735c001bfb3bcf07eb2ea006a99ddcd90d864fad (diff) | |
netfilter: nf_tables: use WARN_ON_ONCE instead of BUG_ON in nft_do_chain()
commit adc972c5b88829d38ede08b1069718661c7330ae upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/netfilter/nf_tables_core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/netfilter/nf_tables_core.c b/net/netfilter/nf_tables_core.c index 40e744572283..32b7896929f3 100644 --- a/net/netfilter/nf_tables_core.c +++ b/net/netfilter/nf_tables_core.c @@ -208,7 +208,8 @@ 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].rule = rule; jumpstack[stackptr].rulenum = rulenum; |