drm/radeon/r600_cs: Fix possible int overflows in r600_cs_check_reg()

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[ Upstream commit 39c960bbf9 ]

While improbable, there may be a chance of hitting integer
overflow when the result of radeon_get_ib_value() gets shifted
left.

Avoid it by casting one of the operands to larger data type (u64).

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

Fixes: 1729dd33d2 ("drm/radeon/kms: r600 CS parser fixes")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Nikita Zhandarovich 2023-11-29 07:22:30 -08:00 • committed by Greg Kroah-Hartman

parent c4135343ec

commit 0ba91c3e10

1 changed files with 2 additions and 2 deletions

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drivers/gpu/drm/radeon/r600_cs.c

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