When "hw->ce4100_gbe_mdio_base_virt = ioremap(...)" fails, the driver does not free the memory allocated in e1000_sw_init(), and also calls "iounmap(hw->ce4100_gbe_mido_base_virt)" that is unnecessary.
Besides, when e1000_sw_init() fails, the driver also calls "iounmap(hw->ce4100_gbe_mido_base_virt)" but hw->ce4100_gbe_mido_base_virt has not been assigned. These bugs are found by a runtime fuzzing tool named FIZZER written by us. To fix these bugs, the error handling code of e1000_probe() is adjusted. Signed-off-by: Jia-Ju Bai <[email protected]> --- drivers/net/ethernet/intel/e1000/e1000_main.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c index 8fe9af0e2ab7..7743c4d9723f 100644 --- a/drivers/net/ethernet/intel/e1000/e1000_main.c +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c @@ -1227,12 +1227,12 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (hw->flash_address) iounmap(hw->flash_address); + iounmap(hw->ce4100_gbe_mdio_base_virt); +err_mdio_ioremap: kfree(adapter->tx_ring); kfree(adapter->rx_ring); -err_dma: err_sw_init: -err_mdio_ioremap: - iounmap(hw->ce4100_gbe_mdio_base_virt); +err_dma: iounmap(hw->hw_addr); err_ioremap: disable_dev = !test_and_set_bit(__E1000_DISABLED, &adapter->flags); -- 2.17.0
