ASoC: Intel: avs: Verify content returned by parse_int_array()

[ Upstream commit 93e246b6 ]

The first element of the returned array stores its length. If it is 0,
any manipulation beyond the element at index 0 ends with null-ptr-deref.

Fixes: 5a565ba2 ("ASoC: Intel: avs: Probing and firmware tracing over debugfs")
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/20250530141025.2942936-8-cezary.rojewski@intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>