Duoming Zhou 6a0c054930 staging: rtl8192u: Fix sleep in atomic context bug in dm_fsync_timer_callback ... There are sleep in atomic context bugs when dm_fsync_timer_callback is executing. The root cause is that the memory allocation functions with GFP_KERNEL or GFP_NOIO parameters are called in dm_fsync_timer_callback which is a timer handler. The call paths that could trigger bugs are shown below: (interrupt context) dm_fsync_timer_callback write_nic_byte kzalloc(sizeof(data), GFP_KERNEL); //may sleep usb_control_msg kmalloc(.., GFP_NOIO); //may sleep write_nic_dword kzalloc(sizeof(data), GFP_KERNEL); //may sleep usb_control_msg kmalloc(.., GFP_NOIO); //may sleep This patch uses delayed work to replace timer and moves the operations that may sleep into the delayed work in order to mitigate bugs. Fixes: 8fc8598e61 ("Staging: Added Realtek rtl8192u driver to staging") Signed-off-by: Duoming Zhou <duoming@zju.edu.cn> Link: https://lore.kernel.org/r/20220710103002.63283-1-duoming@zju.edu.cn Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-07-11 10:05:35 +02:00
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ieee80211	staging: rtl8192u: remove null check after call container_of()	2022-05-19 17:42:53 +02:00
authors
changes
Kconfig
Makefile
r819xU_cmdpkt.c	staging: r819xU_cmdpkt: Remove functionless method 'cmpk_handle_query_config_rx'	2021-05-10 11:19:23 +02:00
r819xU_cmdpkt.h
r819xU_firmware_img.c
r819xU_firmware_img.h
r819xU_firmware.c
r819xU_firmware.h
r819xU_phy.c	staging/rtl8192u: Prefer kcalloc over open coded arithmetic	2021-08-26 12:14:27 +02:00
r819xU_phy.h
r819xU_phyreg.h
r8180_93cx6.c
r8180_93cx6.h
r8190_rtl8256.c
r8190_rtl8256.h
r8192U_core.c	staging: rtl8192u: make const array queuetopipe const, reduces object code size	2022-05-19 17:40:44 +02:00
r8192U_dm.c	staging: rtl8192u: Fix sleep in atomic context bug in dm_fsync_timer_callback	2022-07-11 10:05:35 +02:00
r8192U_dm.h	staging: rtl8192u: Fix sleep in atomic context bug in dm_fsync_timer_callback	2022-07-11 10:05:35 +02:00
r8192U_hw.h	staging: rtl8192u: fix spaces in r8192U_hw.h	2021-06-03 15:59:18 +02:00
r8192U_wx.c
r8192U_wx.h
r8192U.h	staging: rtl8192u: Fix sleep in atomic context bug in dm_fsync_timer_callback	2022-07-11 10:05:35 +02:00