lkml.org 
[lkml]   [2016]   [Feb]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectShould snd_card_free() check for null pointer?
Date
Hi,

Before commit f24640648186b (ALSA: Use standard device refcount for card
accounting), snd_card_free() would return -EINVAL on a null pointer. Now
it ends up in a null pointer dereference. There is at least one driver
that can call snd_card_free() with null argument: saa7134_alsa. It can
easily be triggered by just inserting and removing the module (no need
to have the hardware).
I don't think that is a rule, but it seems that the standard behavior of
*_free() functions is to check for null pointer. What do you think?

Thanks,
Jerome

[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2016-02-09 16:01    [W:0.649 / U:0.368 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site