Zheng Wang b0c202a8dc nfc: st-nci: Fix use after free bug in ndlc_remove due to race condition ... [ Upstream commit 5000fe6c27 ] This bug influences both st_nci_i2c_remove and st_nci_spi_remove. Take st_nci_i2c_remove as an example. In st_nci_i2c_probe, it called ndlc_probe and bound &ndlc->sm_work with llt_ndlc_sm_work. When it calls ndlc_recv or timeout handler, it will finally call schedule_work to start the work. When we call st_nci_i2c_remove to remove the driver, there may be a sequence as follows: Fix it by finishing the work before cleanup in ndlc_remove CPU0 CPU1 |llt_ndlc_sm_work st_nci_i2c_remove | ndlc_remove | st_nci_remove | nci_free_device| kfree(ndev) | //free ndlc->ndev | |llt_ndlc_rcv_queue |nci_recv_frame |//use ndlc->ndev Fixes: 35630df68d ("NFC: st21nfcb: Add driver for STMicroelectronics ST21NFCB NFC chip") Signed-off-by: Zheng Wang <zyytlz.wz@163.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20230312160837.2040857-1-zyytlz.wz@163.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-03-22 13:28:05 +01:00
..
core.c
i2c.c	nfc: st-nci: remove redundant assignment to variable r	2019-07-02 12:00:50 -07:00
Kconfig
Makefile
ndlc.c	nfc: st-nci: Fix use after free bug in ndlc_remove due to race condition	2023-03-22 13:28:05 +01:00
ndlc.h
se.c	nfc: fix memory leak of se_io context in nfc_genl_se_io	2023-03-11 16:44:12 +01:00
spi.c
st-nci.h
vendor_cmds.c