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| author |   Florian Westphal <fw@strlen.de> | 2018-02-19 01:24:15 +0100 |
|---|---|---|
| committer |   Pablo Neira Ayuso <pablo@netfilter.org> | 2018-02-25 20:07:33 +0100 |
| commit | b71812168571fa55e44cdd0254471331b9c4c4c6 (patch) | |
| tree | 6dbae0f54e690041491407e6c0dee550fc67a60a /net/ipv4 | |
| parent | netfilter: ebtables: convert BUG_ONs to WARN_ONs (diff) | |
| download | linux-dev-b71812168571fa55e44cdd0254471331b9c4c4c6.tar.xz linux-dev-b71812168571fa55e44cdd0254471331b9c4c4c6.zip | |
netfilter: ebtables: CONFIG_COMPAT: don't trust userland offsets
We need to make sure the offsets are not out of range of the
total size.
Also check that they are in ascending order.
The WARN_ON triggered by syzkaller (it sets panic_on_warn) is
changed to also bail out, no point in continuing parsing.
Briefly tested with simple ruleset of
-A INPUT --limit 1/s' --log
plus jump to custom chains using 32bit ebtables binary.
Reported-by: <syzbot+845a53d13171abf8bf29@syzkaller.appspotmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/ipv4')
0 files changed, 0 insertions, 0 deletions