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  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:   Thu, 16 Jan 2020 16:19:29 +0100
From:   Toke Høiland-Jørgensen <>
To:     Florian Westphal <>,
Cc:     Florian Westphal <>
Subject: Re: [PATCH net-next] netlink: make getters tolerate NULL nla arg

Florian Westphal <> writes:

> One recurring bug pattern triggered by syzbot is NULL dereference in
> netlink code paths due to a missing "tb[NL_ARG_FOO] != NULL" test.
> At least some of these missing checks would not have crashed the kernel if
> the various nla_get_XXX helpers would return 0 in case of missing arg.

Won't this risk just papering over the issue and lead to subtly wrong
behaviour instead? At least a crash is somewhat visible :)


Powered by blists - more mailing lists