i40e: fix MMIO write access to an invalid page in i40e_clear_hw

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[ Upstream commit 015bac5dac ]

When the device sends a specific input, an integer underflow can occur, leading
to MMIO write access to an invalid page.

Prevent the integer underflow by changing the type of related variables.

Signed-off-by: Kyungwook Boo <bookyungwook@gmail.com>
Link: https://lore.kernel.org/lkml/ffc91764-1142-4ba2-91b6-8c773f6f7095@gmail.com/T/
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Kyungwook Boo 2025-03-11 14:16:02 +09:00 • committed by Greg Kroah-Hartman

parent cafc3c567e

commit fecb2fc3fc

1 changed files with 4 additions and 3 deletions

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drivers/net/ethernet/intel/i40e/i40e_common.c

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