platform/x86/amd/hsmp: Validate ACPI UID before parsing socket index

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hsmp_get_uid() passed the device UID directly to kstrtou16(uid + 2)
without checking it.  A NULL UID or one shorter than three characters
would dereference a NULL pointer or read past the end of the string.

Reject such UIDs with -EINVAL before stripping the "ID" prefix.

Signed-off-by: Muralidhara M K <muralidhara.mk@amd.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/20260625123337.886435-3-muralidhara.mk@amd.com
Link: https://patch.msgid.link/20260629155634.1807598-2-muralidhara.mk@amd.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

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Muralidhara M K 2026-06-29 21:26:31 +05:30 • committed by Ilpo Järvinen

parent 71eb3db934

commit 4c7d1b4cd7

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drivers/platform/x86/amd/hsmp/acpi.c

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