linux-kernel - Re: [RESEND PATCH v2 5/7] usb: xhci: plat: Remove checks for optional clock in error/remove path

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:	Wed, 27 Apr 2016 10:19:32 +0300
From:	Felipe Balbi <felipe.balbi@...ux.intel.com>
To:	Jisheng Zhang <jszhang@...vell.com>, mathias.nyman@...ux.intel.com
Cc:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	yendapally.reddy@...adcom.com
Subject: Re: [RESEND PATCH v2 5/7] usb: xhci: plat: Remove checks for optional clock in error/remove path


Hi,

Jisheng Zhang <jszhang@...vell.com> writes:
> Dear Felipe,
>
> On Wed, 27 Apr 2016 08:33:52 +0300 Felipe Balbi wrote:
>
>> Jisheng Zhang <jszhang@...vell.com> writes:
>> > Commit 63589e92c2d9 ("clk: Ignore error and NULL pointers passed to
>> > clk_{unprepare, disable}()") allows NULL or error pointer to be passed
>> > unconditionally.
>> >
>> > This patch is to simplify probe error and remove code paths.  
>> 
>> this seems wrong to me. xhci->clk isn't initialized to NULL, it's either
>> initialized to a valid struct clk * or some ERR_PTR() value.
>
> Commit 63589e92c2d9 could also ignore error value ;)

oh okay, thanks for that. That's, IMHO, quite dangerous ;-)

-- 
balbi

Download attachment "signature.asc" of type "application/pgp-signature" (819 bytes)