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  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:   Sun, 27 Jan 2019 10:41:42 -0800 (PST)
From:   David Miller <>
Subject: Re: [PATCH] net/rose: fix NULL ax25_cb kernel panic

From: Dmitry Vyukov <>
Date: Fri, 25 Jan 2019 11:46:40 +0100

> From: Bernard Pidoux <>
> When an internally generated frame is handled by rose_xmit(),
> rose_route_frame() is called:
>         if (!rose_route_frame(skb, NULL)) {
>                 dev_kfree_skb(skb);
>                 stats->tx_errors++;
>                 return NETDEV_TX_OK;
>         }
> We have the same code sequence in Net/Rom where an internally generated
> frame is handled by nr_xmit() calling nr_route_frame(skb, NULL).
> However, in this function NULL argument is tested while it is not in
> rose_route_frame().
> Then kernel panic occurs later on when calling ax25cmp() with a NULL
> ax25_cb argument as reported many times and recently with syzbot.
> We need to test if ax25 is NULL before using it.
> Testing:
> Built kernel with CONFIG_ROSE=y.
> Signed-off-by: Bernard Pidoux <>
> Acked-by: Dmitry Vyukov <>
> Reported-by:

Applied and queued up for -stable, thanks.

Powered by blists - more mailing lists