netfilter: ipt_CLUSTERIP: fix out-of-bounds accesses in clusterip_tg_check()

Browse source

commit 1a38956cce upstream.

Commit 136e92bbec switched local_nodes from an array to a bitmask
but did not add proper bounds checks. As the result
clusterip_config_init_nodelist() can both over-read
ipt_clusterip_tgt_info.local_nodes and over-write
clusterip_config.local_nodes.

Add bounds checks for both.

Fixes: 136e92bbec ("[NETFILTER] CLUSTERIP: use a bitmap to store node responsibility data")
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Dmitry Vyukov 2018-01-30 15:21:34 +01:00 • committed by Greg Kroah-Hartman

parent f25f048d3b

commit 2852a7dd15

1 changed files with 13 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

16

net/ipv4/netfilter/ipt_CLUSTERIP.c

View file