From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756008AbdLGPtR (ORCPT ); Thu, 7 Dec 2017 10:49:17 -0500 Received: from fldsmtpe03.verizon.com ([140.108.26.142]:60675 "EHLO fldsmtpe03.verizon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755957AbdLGPtG (ORCPT ); Thu, 7 Dec 2017 10:49:06 -0500 From: alexander.levin@verizon.com Cc: Jia-Ju Bai , Greg Kroah-Hartman , alexander.levin@verizon.com X-Host: pioneer.tdc.vzwcorp.com To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" Subject: [PATCH AUTOSEL for 4.14 110/135] rtl8188eu: Fix a possible sleep-in-atomic bug in rtw_disassoc_cmd Thread-Topic: [PATCH AUTOSEL for 4.14 110/135] rtl8188eu: Fix a possible sleep-in-atomic bug in rtw_disassoc_cmd Thread-Index: AQHTb3J5zRm7VsjGm0O1XcyGwNue5g== Date: Thu, 7 Dec 2017 15:45:57 +0000 Message-ID: <20171207154513.4154-110-alexander.levin@verizon.com> References: <20171207154513.4154-1-alexander.levin@verizon.com> In-Reply-To: <20171207154513.4154-1-alexander.levin@verizon.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.144.60.250] Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by nfs id vB7HkJsc002664 From: Jia-Ju Bai [ 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 Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/staging/rtl8188eu/core/rtw_cmd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/rtl8188eu/core/rtw_cmd.c b/drivers/staging/rtl8188eu/core/rtw_cmd.c index 430b8eb58976..be8542676adf 100644 --- 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 *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); -- 2.11.0