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ALSA: synth: emux: soundfont.c: divide by zero in calc_gus_envelope_time()

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This function is called from load_guspatch() and the rate is specified
by the user.  If they accidentally selected zero then it would crash the
kernel.  I've just changed the zero to a one.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Dan Carpenter 2019-05-06 15:51:19 +03:00 committed by Takashi Iwai
parent 17b89c8031
commit 2854cd34fb
1 changed files with 2 additions and 0 deletions
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sound/synth/emux/soundfont.c
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@ -856,6 +856,8 @@ calc_gus_envelope_time(int rate, int start, int end)
int r, p, t; int r, p, t;
r = (3 - ((rate >> 6) & 3)) * 3; r = (3 - ((rate >> 6) & 3)) * 3;
p = rate & 0x3f; p = rate & 0x3f;
if (!p)
p = 1;
t = end - start; t = end - start;
if (t < 0) t = -t; if (t < 0) t = -t;
if (13 > r) if (13 > r)