From: Mark Brown broonie@kernel.org

stable inclusion from stable-v4.19.228 commit 65a61b1f56f5386486757930069fbdce94af08bf category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IA72DZ CVE: CVE-2022-48738

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

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commit 817f7c9335ec01e0f5e8caffc4f1dcd5e458a4c0 upstream.

We don't currently validate that the values being set are within the range we advertised to userspace as being valid, do so and reject any values that are out of range.

Signed-off-by: Mark Brown broonie@kernel.org Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20220124153253.3548853-2-broonie@kernel.org Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Jialin Zhang zhangjialin11@huawei.com --- sound/soc/soc-ops.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c index 948d0600aa61..1baf256a69f7 100644 --- a/sound/soc/soc-ops.c +++ b/sound/soc/soc-ops.c @@ -322,13 +322,27 @@ int snd_soc_put_volsw(struct snd_kcontrol *kcontrol, if (sign_bit) mask = BIT(sign_bit + 1) - 1;

- val = ((ucontrol->value.integer.value[0] + min) & mask); + val = ucontrol->value.integer.value[0]; + if (mc->platform_max && val > mc->platform_max) + return -EINVAL; + if (val > max - min) + return -EINVAL; + if (val < 0) + return -EINVAL; + val = (val + min) & mask; if (invert) val = max - val; val_mask = mask << shift; val = val << shift; if (snd_soc_volsw_is_stereo(mc)) { - val2 = ((ucontrol->value.integer.value[1] + min) & mask); + val2 = ucontrol->value.integer.value[1]; + if (mc->platform_max && val2 > mc->platform_max) + return -EINVAL; + if (val2 > max - min) + return -EINVAL; + if (val2 < 0) + return -EINVAL; + val2 = (val2 + min) & mask; if (invert) val2 = max - val2; if (reg == reg2) {