netfilter: x_tables: make sure e->next_offset covers remaining blob size

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commit 6e94e0cfb0 upstream.

Otherwise this function may read data beyond the ruleset blob.

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

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Florian Westphal 2016-03-22 18:02:50 +01:00 • committed by Ben Hutchings

parent dc385be2ea

commit 113ec64467

3 changed files with 12 additions and 6 deletions

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6

net/ipv4/netfilter/arp_tables.c

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6

net/ipv4/netfilter/ip_tables.c

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6

net/ipv6/netfilter/ip6_tables.c

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