-----Original Message----- From: Intel-wired-lan <intel-wired-lan-boun...@osuosl.org> On Behalf Of Xie XiuQi Sent: Monday, May 4, 2020 7:45 PM To: Kirsher, Jeffrey T <jeffrey.t.kirs...@intel.com>; da...@davemloft.net Cc: netdev@vger.kernel.org; intel-wired-...@lists.osuosl.org; linux-ker...@vger.kernel.org Subject: [Intel-wired-lan] [PATCH net-next] ixgbe: fix signed-integer-overflow warning
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 <hul...@huawei.com> Signed-off-by: Xie XiuQi <xiexi...@huawei.com> --- drivers/net/ethernet/intel/ixgbe/ixgbe_common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Tested-by: Andrew Bowers <andrewx.bow...@intel.com>
