This is a note to let you know that I've just added the patch titled

rtl8188eu: Fix a possible sleep-in-atomic bug in rtw_createbss_cmd

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: rtl8188eu-fix-a-possible-sleep-in-atomic-bug-in-rtw_createbss_cmd.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Mon Dec 18 14:12:35 CET 2017

From: Jia-Ju Bai baijiaju1990@163.com Date: Sun, 8 Oct 2017 19:54:45 +0800 Subject: rtl8188eu: Fix a possible sleep-in-atomic bug in rtw_createbss_cmd

From: Jia-Ju Bai baijiaju1990@163.com

[ Upstream commit 2bf9806d4228f7a6195f8e03eda0479d2a93b411 ]

The driver may sleep under a spinlock, and the function call path is: rtw_surveydone_event_callback(acquire the spinlock) rtw_createbss_cmd kzalloc(GFP_KERNEL) --> may sleep

To fix it, GFP_KERNEL is replaced with GFP_ATOMIC. This bug is found by my static analysis tool and my code review.

Signed-off-by: Jia-Ju Bai baijiaju1990@163.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/staging/rtl8188eu/core/rtw_cmd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/rtl8188eu/core/rtw_cmd.c +++ b/drivers/staging/rtl8188eu/core/rtw_cmd.c @@ -342,7 +342,7 @@ u8 rtw_createbss_cmd(struct adapter *pa else RT_TRACE(_module_rtl871x_cmd_c_, _drv_info_, (" createbss for SSid:%s\n", pmlmepriv->assoc_ssid.Ssid));

- pcmd = kzalloc(sizeof(struct cmd_obj), GFP_KERNEL); + pcmd = kzalloc(sizeof(struct cmd_obj), GFP_ATOMIC); if (!pcmd) { res = _FAIL; goto exit;

Patches currently in stable-queue which might be from baijiaju1990@163.com are

queue-4.9/rtl8188eu-fix-a-possible-sleep-in-atomic-bug-in-rtw_createbss_cmd.patch queue-4.9/rtl8188eu-fix-a-possible-sleep-in-atomic-bug-in-rtw_disassoc_cmd.patch queue-4.9/vt6655-fix-a-possible-sleep-in-atomic-bug-in-vt6655_suspend.patch