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_disassoc_cmd
to the 4.14-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:
rtl8188eu-fix-a-possible-sleep-in-atomic-bug-in-rtw_disassoc_cmd.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon Dec 18 13:29:00 CET 2017
From: Jia-Ju Bai <baijiaju1990@xxxxxxx>
Date: Sun, 8 Oct 2017 19:54:07 +0800
Subject: rtl8188eu: Fix a possible sleep-in-atomic bug in rtw_disassoc_cmd
From: Jia-Ju Bai <baijiaju1990@xxxxxxx>
[ Upstream commit 08880f8e08cbd814e870e9d3ab9530abc1bce226 ]
The driver may sleep under a spinlock, and the function call path is:
rtw_set_802_11_bssid(acquire the spinlock)
rtw_disassoc_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@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -508,7 +508,7 @@ u8 rtw_disassoc_cmd(struct adapter *pada
if (enqueue) {
/* need enqueue, prepare cmd_obj and enqueue */
- cmdobj = kzalloc(sizeof(*cmdobj), GFP_KERNEL);
+ cmdobj = kzalloc(sizeof(*cmdobj), GFP_ATOMIC);
if (!cmdobj) {
res = _FAIL;
kfree(param);
Patches currently in stable-queue which might be from baijiaju1990@xxxxxxx are
queue-4.14/rtl8188eu-fix-a-possible-sleep-in-atomic-bug-in-rtw_createbss_cmd.patch
queue-4.14/rtl8188eu-fix-a-possible-sleep-in-atomic-bug-in-rtw_disassoc_cmd.patch
queue-4.14/vt6655-fix-a-possible-sleep-in-atomic-bug-in-vt6655_suspend.patch