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| author | Colin Ian King <colin.king@canonical.com> | 2019-05-24 23:25:51 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-05-28 15:53:17 +0100 |
| commit | be0461048b60066eaba9046178fb96e78579af21 (patch) | |
| tree | 0dd85ab05276d1e27311df538d759e9a77c2d80d /sound/soc/codecs | |
| parent | eb5b12843b067d685a8d7a191b928b07934b2d02 (diff) | |
| download | linux-stable-be0461048b60066eaba9046178fb96e78579af21.tar.gz linux-stable-be0461048b60066eaba9046178fb96e78579af21.tar.bz2 linux-stable-be0461048b60066eaba9046178fb96e78579af21.zip | |
ASoC: cx2072x: fix integer overflow on unsigned int multiply
In the case where frac_div larger than 96 the result of an unsigned
multiplication overflows an unsigned int. For example, this can
happen when the sample_rate is 192000 and pll_input is 122. Fix
this by casing the first term of the mutiply to a u64. Also remove
the extraneous parentheses around the expression.
Addresses-Coverity: ("Unintentional integer overflow")
Fixes: a497a4363706 ("ASoC: Add support for Conexant CX2072X CODEC")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs')
| -rw-r--r-- | sound/soc/codecs/cx2072x.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/soc/codecs/cx2072x.c b/sound/soc/codecs/cx2072x.c index c11a585bbf70..ed762546eaee 100644 --- a/sound/soc/codecs/cx2072x.c +++ b/sound/soc/codecs/cx2072x.c @@ -627,7 +627,7 @@ static int cx2072x_config_pll(struct cx2072x_priv *cx2072x) if (frac_div) { frac_div *= 1000; frac_div /= pll_input; - frac_num = ((4000 + frac_div) * ((1 << 20) - 4)); + frac_num = (u64)(4000 + frac_div) * ((1 << 20) - 4); do_div(frac_num, 7); frac = ((u32)frac_num + 499) / 1000; } |