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

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[ 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>
This commit is contained in:
Jia-Ju Bai 2017-10-08 19:54:45 +08:00 committed by Greg Kroah-Hartman
parent 28e006e14f
commit 6641d3e307
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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@ -342,7 +342,7 @@ u8 rtw_createbss_cmd(struct adapter *padapter)
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;