netfilter: compat: reject huge allocation requests

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commit 7d7d7e0211 upstream.

no need to bother even trying to allocating huge compat offset arrays,
such ruleset is rejected later on anyway becaus we refuse to allocate
overly large rule blobs.

However, compat translation happens before blob allocation, so we should
add a check there too.

This is supposed to help with fuzzing by avoiding oom-killer.

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

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Florian Westphal 2018-02-27 19:42:35 +01:00 • committed by Greg Kroah-Hartman

parent 8d92d53365

commit 764f2162d9

1 changed files with 18 additions and 8 deletions

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net/netfilter/x_tables.c

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