[alsa-devel] [PATCH] ALSA: aloop: Avoid pointer dereference before null-check

[Takashi Iwai]

On Wed, 27 Nov 2019 12:06:22 +0100,
Andrew Gabbasov wrote:
> 
> Static analysis tools (cppcheck and PVS Studio) report an error
> in loopback_snd_timer_period_elapsed() regarding dpcm_play pointer
> dereference earlier than its null-check. And although this is a result
> of a formal check, and the pointer correctness is also protected
> by having a corresponding bit set in the "running" mask, re-ordering
> of the lines can imake the code even formally correct and eliminate
> those static analysis error reports.
> 
> Fixes: 26c53379f98d ("ALSA: aloop: Support selection of snd_timer instead of jiffies")
> Reported-by: Eugeniu Rosca <erosca at de.adit-jv.com>
> Signed-off-by: Andrew Gabbasov <andrew_gabbasov at mentor.com>

Applied, thanks.


Takashi