From: Xie XiuQi xiexiuqi@huawei.com
[ Upstream commit 3b70683fc4d68f5d915d9dc7e5ba72c732c7315c ]
ubsan report this warning, fix it by adding a unsigned suffix.
UBSAN: signed-integer-overflow in drivers/net/ethernet/intel/ixgbe/ixgbe_common.c:2246:26 65535 * 65537 cannot be represented in type 'int' CPU: 21 PID: 7 Comm: kworker/u256:0 Not tainted 5.7.0-rc3-debug+ #39 Hardware name: Huawei TaiShan 2280 V2/BC82AMDC, BIOS 2280-V2 03/27/2020 Workqueue: ixgbe ixgbe_service_task [ixgbe] Call trace: dump_backtrace+0x0/0x3f0 show_stack+0x28/0x38 dump_stack+0x154/0x1e4 ubsan_epilogue+0x18/0x60 handle_overflow+0xf8/0x148 __ubsan_handle_mul_overflow+0x34/0x48 ixgbe_fc_enable_generic+0x4d0/0x590 [ixgbe] ixgbe_service_task+0xc20/0x1f78 [ixgbe] process_one_work+0x8f0/0xf18 worker_thread+0x430/0x6d0 kthread+0x218/0x238 ret_from_fork+0x10/0x18
Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Xie XiuQi xiexiuqi@huawei.com Tested-by: Andrew Bowers andrewx.bowers@intel.com Signed-off-by: Jeff Kirsher jeffrey.t.kirsher@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/intel/ixgbe/ixgbe_common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c index cd2afe92f1da..e10808b3d118 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c @@ -2185,7 +2185,7 @@ s32 ixgbe_fc_enable_generic(struct ixgbe_hw *hw) }
/* Configure pause time (2 TCs per register) */ - reg = hw->fc.pause_time * 0x00010001; + reg = hw->fc.pause_time * 0x00010001U; for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++) IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);