netdev - Re: [PATCH v2] isdn: hfcsusb: Fix mISDN driver crash caused by transfer buffer on the stack

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] [day] [month] [year] [list]

Message-Id: <20190731.085425.835225391467422617.davem@davemloft.net>
Date:   Wed, 31 Jul 2019 08:54:25 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     juliana.rodrigueiro@...ra2net.com
Cc:     isdn@...ux-pingi.de, netdev@...r.kernel.org,
        thomas.jarosch@...ra2net.com
Subject: Re: [PATCH v2] isdn: hfcsusb: Fix mISDN driver crash caused by
 transfer buffer on the stack

From: Juliana Rodrigueiro <juliana.rodrigueiro@...ra2net.com>
Date: Wed, 31 Jul 2019 15:17:23 +0200

> Since linux 4.9 it is not possible to use buffers on the stack for DMA transfers.
> 
> During usb probe the driver crashes with "transfer buffer is on stack" message.
> 
> This fix k-allocates a buffer to be used on "read_reg_atomic", which is a macro
> that calls "usb_control_msg" under the hood.
> 
> Kernel 4.19 backtrace:
 ...
> Signed-off-by: Juliana Rodrigueiro <juliana.rodrigueiro@...ra2net.com>

Applied.