[PATCH 4.14 154/178] rtl8188eu: Fix a possible sleep-in-atomic bug in rtw_disassoc_cmd

[Greg Kroah-Hartman]

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

------------------

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);