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  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:   Tue, 08 Sep 2020 19:57:25 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com, dsahern@...il.com
Subject: Re: [PATCH net] ipv6: avoid lockdep issue in fib6_del()

From: Eric Dumazet <edumazet@...gle.com>
Date: Tue,  8 Sep 2020 01:20:23 -0700

> syzbot reported twice a lockdep issue in fib6_del() [1]
> which I think is caused by net->ipv6.fib6_null_entry
> having a NULL fib6_table pointer.
> 
> fib6_del() already checks for fib6_null_entry special
> case, we only need to return earlier.
> 
> Bug seems to occur very rarely, I have thus chosen
> a 'bug origin' that makes backports not too complex.
 ...
> Fixes: 421842edeaf6 ("net/ipv6: Add fib6_null_entry")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied and queued up for -stable, thanks Eric.

Powered by blists - more mailing lists