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ASoC: change mask in snd_soc_get/put_volsw_sx to unsigned int 

If the result of (min + max) is negative in functions
snd_soc_get_volsw_sx() or snd_soc_put_volsw_sx(), there
will be an overflow for the variable 'mask'.
   UBSAN: Undefined behaviour in sound/soc/soc-ops.c:382:6
   signed integer overflow:
   -2147483648 - 1 cannot be represented in type 'int'

Fix this by updating the variable type of 'mask' to unsigned int.

Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
zero-colors
Banajit Goswami 2017-12-31 20:40:14 -08:00 committed by Mark Brown
parent cb2cf0de11
commit b9f902b7fd
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GPG Key ID: 24D68B725D5487D0
1 changed files with 2 additions and 2 deletions
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sound/soc/soc-ops.c
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@ -378,7 +378,7 @@ int snd_soc_get_volsw_sx(struct snd_kcontrol *kcontrol,
unsigned int rshift = mc->rshift;
int max = mc->max;
int min = mc->min;
int mask = (1 << (fls(min + max) - 1)) - 1;
unsigned int mask = (1 << (fls(min + max) - 1)) - 1;
unsigned int val;
int ret;
@ -423,7 +423,7 @@ int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
unsigned int rshift = mc->rshift;
int max = mc->max;
int min = mc->min;
int mask = (1 << (fls(min + max) - 1)) - 1;
unsigned int mask = (1 << (fls(min + max) - 1)) - 1;
int err = 0;
unsigned int val, val_mask, val2 = 0;