[PATCH 5.4 010/367] staging: rtl8712: fix race condition

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


5.4-stable review patch.  If anyone has any objections, please let me know.


From: Nam Cao <namcaov@xxxxxxxxx>

commit 1422b526fba994cf05fd288a152106563b875fce upstream.

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@xxxxxxxxxxxxxxxxxxxxxxxxx
Closes: https://lore.kernel.org/linux-staging/000000000000d9d4560601b8e0d7@xxxxxxxxxx/T/#u
Fixes: 8c213fa59199 ("staging: r8712u: Use asynchronous firmware loading")
Cc: stable <stable@xxxxxxxxxx>
Signed-off-by: Nam Cao <namcaov@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230731110620.116562-1-namcaov@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
 drivers/staging/rtl8712/os_intfs.c |    1 +
 drivers/staging/rtl8712/usb_intf.c |    1 -
 2 files changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/rtl8712/os_intfs.c
+++ b/drivers/staging/rtl8712/os_intfs.c
@@ -323,6 +323,7 @@ int r8712_init_drv_sw(struct _adapter *p
+	mutex_init(&padapter->mutex_start);
 	return ret;
--- a/drivers/staging/rtl8712/usb_intf.c
+++ b/drivers/staging/rtl8712/usb_intf.c
@@ -570,7 +570,6 @@ static int r871xu_drv_init(struct usb_in
 	if (rtl871x_load_fw(padapter))
 		goto error;
-	mutex_init(&padapter->mutex_start);
 	return 0;

[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux