tree a8b1793ed292988a7d150816b1a3d42dd78900ba
parent 3a370502a5681986f9828e43be75ce26c6ab24af
author Nikita Kiryushin <kiryushin@ancud.ru> 1699553339 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1706223153 -0800

ACPI: LPIT: Avoid u32 multiplication overflow

[ Upstream commit 56d2eeda87995245300836ee4dbd13b002311782 ]

In lpit_update_residency() there is a possibility of overflow
in multiplication, if tsc_khz is large enough (> UINT_MAX/1000).

Change multiplication to mul_u32_u32().

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: eeb2d80d502a ("ACPI / LPIT: Add Low Power Idle Table (LPIT) support")
Signed-off-by: Nikita Kiryushin <kiryushin@ancud.ru>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>