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ALSA: ak4117: Do not free priv until timer handler hasn't actually stopped using it
authorKirill Tkhai <ktkhai@parallels.com>
Fri, 14 Feb 2014 11:47:57 +0000 (15:47 +0400)
committerTakashi Iwai <tiwai@suse.de>
Fri, 14 Feb 2014 13:41:52 +0000 (14:41 +0100)
commit115b94d51a3ee1b7dfffa74f77e20cd11da70b91
tree447f055272dd38953873fdf14a86ebdb68c51806tree | snapshot (tar.gz zip)
parent9ce5054363c6ec7e38d0c6c39bd116ec4f7d6480commit | diff
ALSA: ak4117: Do not free priv until timer handler hasn't actually stopped using it

Function del_timer() does not guarantee that timer was really deleted.
If the timer handler is beeing executed at the moment, the function
does nothing. So, it's possible to use already freed memory in the handler:

[ref: Documentation/DocBook/kernel-locking.tmpl]

This was found using grep and compile-tested only.

Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/i2c/other/ak4117.c diff | blob | blame | history