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

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[ Upstream commit 015bac5daca978448f2671478c553ce1f300c21e ]

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>
This commit is contained in:
Kyungwook Boo
2025-03-11 14:16:02 +09:00
committed by Greg Kroah-Hartman
parent 52a16bafda
commit 8cde755f56
1 changed files with 4 additions and 3 deletions
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7
drivers/net/ethernet/intel/i40e/i40e_common.c
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@@ -1067,10 +1067,11 @@ int i40e_pf_reset(struct i40e_hw *hw)
void i40e_clear_hw(struct i40e_hw *hw) void i40e_clear_hw(struct i40e_hw *hw)
{ {
u32 num_queues, base_queue; u32 num_queues, base_queue;
u32 num_pf_int; s32 num_pf_int;
u32 num_vf_int; s32 num_vf_int;
u32 num_vfs; u32 num_vfs;
u32 i, j; s32 i;
u32 j;
u32 val; u32 val;
u32 eol = 0x7ff; u32 eol = 0x7ff;