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mirror_ubuntu-kernels/drivers/net/ethernet/qualcomm/emac
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Zheng Wang 6b6bc5b8bd net: qcom/emac: Fix use after free bug in emac_remove due to race condition 
In emac_probe, &adpt->work_thread is bound with
emac_work_thread. Then it will be started by timeout
handler emac_tx_timeout or a IRQ handler emac_isr.

If we remove the driver which will call emac_remove
  to make cleanup, there may be a unfinished work.

The possible sequence is as follows:

Fix it by finishing the work before cleanup in the emac_remove
and disable timeout response.

CPU0                  CPU1

                    |emac_work_thread
emac_remove         |
free_netdev         |
kfree(netdev);      |
                    |emac_reinit_locked
                    |emac_mac_down
                    |//use netdev
Fixes: b9b17debc6 ("net: emac: emac gigabit ethernet controller driver")
Signed-off-by: Zheng Wang <zyytlz.wz@163.com>

Signed-off-by: David S. Miller <davem@davemloft.net>
2023-03-20 09:11:18 +00:00
..
emac-ethtool.c ethtool: extend ringparam setting/getting API with rx_buf_len 2021-11-22 12:31:49 +00:00
emac-mac.c net: add skb_[inner_]tcp_all_headers helpers 2022-07-02 16:22:25 +01:00
emac-mac.h net: emac: Fix use correct return type for ndo_start_xmit() 2020-05-05 11:20:23 -07:00
emac-phy.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
emac-phy.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
emac-sgmii-fsm9900.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
emac-sgmii-qdf2400.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
emac-sgmii-qdf2432.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
emac-sgmii.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
emac-sgmii.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
emac.c net: qcom/emac: Fix use after free bug in emac_remove due to race condition 2023-03-20 09:11:18 +00:00
emac.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00