netfilter: x_tables: check error target size too

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Check that userspace ERROR target (custom user-defined chains) match
expected format, and the chain name is null terminated.

This is irrelevant for kernel, but iptables itself relies on sane input
when it dumps rules from kernel.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

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Florian Westphal 2018-02-27 19:42:28 +01:00 • committed by Pablo Neira Ayuso

parent 07a9da51b4

commit 472ebdcd15

1 changed files with 23 additions and 0 deletions

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net/netfilter/x_tables.c

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