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| author | Stephen Lee <slee08177@gmail.com> | 2024-03-26 04:01:31 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-03-29 01:01:43 +0300 |
| commit | fc563aa900659a850e2ada4af26b9d7a3de6c591 (patch) | |
| tree | 7b1458d48482ad99af2f85c3671f5ab60610f2f6 /sound | |
| parent | 4af565de9f8c74b9f6035924ce0d40adec211246 (diff) | |
| download | linux-fc563aa900659a850e2ada4af26b9d7a3de6c591.tar.xz | |
ASoC: ops: Fix wraparound for mask in snd_soc_get_volsw
In snd_soc_info_volsw(), mask is generated by figuring out the index of
the most significant bit set in max and converting the index to a
bitmask through bit shift 1. Unintended wraparound occurs when max is an
integer value with msb bit set. Since the bit shift value 1 is treated
as an integer type, the left shift operation will wraparound and set
mask to 0 instead of all 1's. In order to fix this, we type cast 1 as
`1ULL` to prevent the wraparound.
Fixes: 7077148fb50a ("ASoC: core: Split ops out of soc-core.c")
Signed-off-by: Stephen Lee <slee08177@gmail.com>
Link: https://msgid.link/r/20240326010131.6211-1-slee08177@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/soc-ops.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c index 2d25748ca706..b27e89ff6a16 100644 --- a/sound/soc/soc-ops.c +++ b/sound/soc/soc-ops.c @@ -263,7 +263,7 @@ int snd_soc_get_volsw(struct snd_kcontrol *kcontrol, int max = mc->max; int min = mc->min; int sign_bit = mc->sign_bit; - unsigned int mask = (1 << fls(max)) - 1; + unsigned int mask = (1ULL << fls(max)) - 1; unsigned int invert = mc->invert; int val; int ret; |