From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.ispras.ru ([83.149.199.45]:49835 "EHLO mail.ispras.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932379AbbLVRkD (ORCPT ); Tue, 22 Dec 2015 12:40:03 -0500 From: Alexey Khoroshilov To: Greg Kroah-Hartman Cc: Alexey Khoroshilov , Johnny Kim , linux-wireless@vger.kernel.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, ldv-project@linuxtesting.org Subject: [PATCH v3] staging: wilc1000: fix double mutex_unlock on failure path in wilc_wlan_cleanup() Date: Tue, 22 Dec 2015 20:39:26 +0300 Message-Id: <1450805966-9193-1-git-send-email-khoroshilov@ispras.ru> (sfid-20151222_184029_824908_18F8D2F4) In-Reply-To: <20151221212202.GA11670@kroah.com> References: <20151221212202.GA11670@kroah.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: If hif_read_reg() or hif_write_reg() fail in wilc_wlan_cleanup(), it calls release_bus() and continues execution. But it leads to double release_bus() call that means double unlock of g_linux_wlan->hif_cs mutex. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov --- drivers/staging/wilc1000/wilc_wlan.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/staging/wilc1000/wilc_wlan.c b/drivers/staging/wilc1000/wilc_wlan.c index 83af51b..b8c4a63 100644 --- a/drivers/staging/wilc1000/wilc_wlan.c +++ b/drivers/staging/wilc1000/wilc_wlan.c @@ -1381,15 +1381,16 @@ void wilc_wlan_cleanup(struct net_device *dev) ret = wilc->hif_func->hif_read_reg(wilc, WILC_GP_REG_0, ®); if (!ret) { PRINT_ER("Error while reading reg\n"); - release_bus(wilc, RELEASE_ALLOW_SLEEP); + goto unlock; } PRINT_ER("Writing ABORT reg\n"); ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_0, (reg | ABORT_INT)); if (!ret) { PRINT_ER("Error while writing reg\n"); - release_bus(wilc, RELEASE_ALLOW_SLEEP); + goto unlock; } +unlock: release_bus(wilc, RELEASE_ALLOW_SLEEP); wilc->hif_func->hif_deinit(NULL); } -- 1.9.1