linux-kernel - KASAN: use-after-free Write in nf_nat_ipv6_manip

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <001a114f041044cf7505658783bf@google.com>
Date:   Sun, 18 Feb 2018 18:33:00 -0800
From:   syzbot <syzbot+10005f4292fc9cc89de7@...kaller.appspotmail.com>
To:     coreteam@...filter.org, davem@...emloft.net, fw@...len.de,
        kadlec@...ckhole.kfki.hu, kuznet@....inr.ac.ru,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, pablo@...filter.org,
        syzkaller-bugs@...glegroups.com, yoshfuji@...ux-ipv6.org
Subject: KASAN: use-after-free Write in nf_nat_ipv6_manip_pkt

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger  
crash:

Reported-and-tested-by:  
syzbot+10005f4292fc9cc89de7@...kaller.appspotmail.com

Note: the tag will also help syzbot to understand when the bug is fixed.

Tested on git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf.git/master  
commit
de526f401284e1638d4c97cb5a4c292ac3f37655 (Mon Feb 12 16:11:48 2018 +0000)
netfilter: xt_hashlimit: fix lock imbalance

compiler: gcc (GCC) 7.1.1 20170620
Patch is attached.
Kernel config is attached.


---
There is no WARRANTY for the result, to the extent permitted by applicable  
law.
Except when otherwise stated in writing syzbot provides the result "AS IS"
without warranty of any kind, either expressed or implied, but not limited  
to,
the implied warranties of merchantability and fittness for a particular  
purpose.
The entire risk as to the quality of the result is with you. Should the  
result
prove defective, you assume the cost of all necessary servicing, repair or
correction.

View attachment "patch.diff" of type "text/plain" (460 bytes)

View attachment "config.txt" of type "text/plain" (136361 bytes)