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 <[email protected]> Link: https://lore.kernel.org/lkml/[email protected]/T/ --- Changes in v2: - Formatting properly - Fix variable shadowing - Link to v1: https://lore.kernel.org/netdev/[email protected]/ --- drivers/net/ethernet/intel/i40e/i40e_common.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c index 370b4bddee44..b11c35e307ca 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_common.c +++ b/drivers/net/ethernet/intel/i40e/i40e_common.c @@ -817,10 +817,11 @@ int i40e_pf_reset(struct i40e_hw *hw) void i40e_clear_hw(struct i40e_hw *hw) { u32 num_queues, base_queue; - u32 num_pf_int; - u32 num_vf_int; + s32 num_pf_int; + s32 num_vf_int; u32 num_vfs; - u32 i, j; + s32 i; + u32 j; u32 val; u32 eol = 0x7ff; --- base-commit: 4d872d51bc9d7b899c1f61534e3dbde72613f627 Best regards, Kyungwook Boo
