lkml.org 
[lkml]   [2022]   [Jan]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Re: [PATCH] thunderbolt: Check for null pointer after calling kmemdup
On Wed, Jan 05, 2022 at 04:53:07PM +0800, Jiasheng Jiang wrote:
> On Wed, Jan 05, 2022 at 03:30:47PM +0800, Mika Westerberg wrote:
> > This is doing two things so I suggest sending two patches instead.
>
> Fine, I have already sent the patch for icm_handle_event() independently.

Thanks!

> > However, for the UUID part, I think it works fine if we get NULL (and I
> > think kmemdup() issues warning too).
> >
> > There are probably not needed either since the "fix" here is for pretty
> > rare case of running out of memory. I think there is not even a NULL
> > pointer dereference because UUID is optional.
>
> As for icm_icl_set_uuid(), I think the check for kmemdup() is needed.
> Because users need to know that icm_start() fails, or they will be puzzled
> why the uuid is unsetted.
> So at least it is a cleanup.
> if so, I would like to send patch for icm_icl_set_uuid() without fixes tag.

I don't think icm_start() actually fails because if this. If the UUID is
not set tb_switch_add() will look it up from the host router vendor area
then.

We can log a warning or something like that (but I think that's already
done in kmemdup()).

\
 
 \ /
  Last update: 2022-01-05 11:15    [W:0.043 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site