This is a note to let you know that I've just added the patch titled
staging: rtl8712: fix race condition
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
staging-rtl8712-fix-race-condition.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1422b526fba994cf05fd288a152106563b875fce Mon Sep 17 00:00:00 2001
From: Nam Cao <namcaov@xxxxxxxxx>
Date: Mon, 31 Jul 2023 13:06:20 +0200
Subject: staging: rtl8712: fix race condition
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
@@ -327,6 +327,7 @@ int r8712_init_drv_sw(struct _adapter *p
mp871xinit(padapter);
init_default_value(padapter);
r8712_InitSwLeds(padapter);
+ mutex_init(&padapter->mutex_start);
return 0;
--- 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_in
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:
Patches currently in stable-queue which might be from namcaov@xxxxxxxxx are
queue-6.4/staging-rtl8712-fix-race-condition.patch
