netfilter: nf_tables: fix oob access

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commit 3e38df136e upstream.

BUG: KASAN: slab-out-of-bounds in nf_tables_rule_destroy+0xf1/0x130 at addr ffff88006a4c35c8
Read of size 8 by task nft/1607

When we've destroyed last valid expr, nft_expr_next() returns an invalid expr.
We must not dereference it unless it passes != nft_expr_last() check.

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 2016-12-13 13:59:33 +01:00 • committed by Ben Hutchings

parent 8f20977a8f

commit 1bf8bc4174

1 changed files with 1 additions and 1 deletions

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net/netfilter/nf_tables_api.c

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