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netfilter: nf_tables: use WARN_ON_ONCE instead of BUG_ON in nft_do_chain() 

commit adc972c5b8 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>
pull/10/head
Taehee Yoo 2018-06-11 22:16:33 +09:00 committed by Greg Kroah-Hartman
parent 5acd64888e
commit 259cc05cce
1 changed files with 2 additions and 1 deletions
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3
net/netfilter/nf_tables_core.c
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@ -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;