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| author | Nam Cao <namcaov@gmail.com> | 2023-07-31 13:06:20 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-04 16:20:13 +0200 |
| commit | 1422b526fba994cf05fd288a152106563b875fce (patch) | |
| tree | ff70ac32e36e361bd46e124b6f5dcf252dd71080 /drivers/staging/rtl8712 | |
| parent | ac19020be0e2e6ff62d18439d7f81251bdd1bb5a (diff) | |
| download | lwn-1422b526fba994cf05fd288a152106563b875fce.tar.gz lwn-1422b526fba994cf05fd288a152106563b875fce.zip | |
staging: rtl8712: fix race condition
In probe function, request_firmware_nowait() is called to load firmware
asynchronously. At completion of firmware loading, register_netdev() is
called. However, a mutex needed by netdev is initialized after the call
to request_firmware_nowait(). Consequently, it can happen that
register_netdev() is called before the driver is ready.
Move the mutex initialization into r8712_init_drv_sw(), which is called
before request_firmware_nowait().
Reported-by: syzbot+b08315e8cf5a78eed03c@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/linux-staging/000000000000d9d4560601b8e0d7@google.com/T/#u
Fixes: 8c213fa59199 ("staging: r8712u: Use asynchronous firmware loading")
Cc: stable <stable@kernel.org>
Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/20230731110620.116562-1-namcaov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/rtl8712')
| -rw-r--r-- | drivers/staging/rtl8712/os_intfs.c | 1 | ||||
| -rw-r--r-- | drivers/staging/rtl8712/usb_intf.c | 1 |
2 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/rtl8712/os_intfs.c b/drivers/staging/rtl8712/os_intfs.c index a2f3645be0cc..b18e6d9c832b 100644 --- a/drivers/staging/rtl8712/os_intfs.c +++ b/drivers/staging/rtl8712/os_intfs.c @@ -327,6 +327,7 @@ int r8712_init_drv_sw(struct _adapter *padapter) mp871xinit(padapter); init_default_value(padapter); r8712_InitSwLeds(padapter); + mutex_init(&padapter->mutex_start); return 0; diff --git a/drivers/staging/rtl8712/usb_intf.c b/drivers/staging/rtl8712/usb_intf.c index 37364d3101e2..df05213f922f 100644 --- a/drivers/staging/rtl8712/usb_intf.c +++ b/drivers/staging/rtl8712/usb_intf.c @@ -567,7 +567,6 @@ static int r871xu_drv_init(struct usb_interface *pusb_intf, if (rtl871x_load_fw(padapter)) goto deinit_drv_sw; init_completion(&padapter->rx_filter_ready); - mutex_init(&padapter->mutex_start); return 0; deinit_drv_sw: |