netdev - Re: [PATCH net v2] tipc: Fix uninit-value access in tipc_nl_node_reset_link

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

Date: Mon, 23 Oct 2023 15:53:14 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Shigeru Yoshida <syoshida@...hat.com>
Cc: jmaloy@...hat.com, ying.xue@...driver.com, netdev@...r.kernel.org,
 tipc-discussion@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
 syzbot+5138ca807af9d2b42574@...kaller.appspotmail.com
Subject: Re: [PATCH net v2] tipc: Fix uninit-value access in
 tipc_nl_node_reset_link_stats()

On Sat, 21 Oct 2023 01:34:15 +0900 Shigeru Yoshida wrote:
> Link names must be null-terminated strings. If a link name which is not
> null-terminated is passed through netlink, strstr() and similar functions
> can cause buffer overrun. This causes the above issue.

If strings need to be null-terminated you should switch the policy here
https://elixir.bootlin.com/linux/v6.6-rc6/source/net/tipc/netlink.c#L91
from NLA_STRING to NLA_NUL_STRING, no?
-- 
pw-bot: cr