ACPI: LPIT: Avoid u32 multiplication overflow

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[ Upstream commit 56d2eeda87 ]

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: eeb2d80d50 ("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>

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Nikita Kiryushin 2023-11-09 21:08:59 +03:00 • committed by Greg Kroah-Hartman

parent 2124c5bc22

commit 72222dfd76

1 changed files with 1 additions and 1 deletions

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drivers/acpi/acpi_lpit.c

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