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

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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@163.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jia-Ju Bai
2017-10-08 19:54:07 +08:00
committed by Greg Kroah-Hartman
parent cf2bfebcc3
commit 08880f8e08
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/rtl8188eu/core/rtw_cmd.c
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@@ -508,7 +508,7 @@ u8 rtw_disassoc_cmd(struct adapter *padapter, u32 deauth_timeout_ms, bool enqueu
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);