From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 366301C07 for ; Wed, 28 Dec 2022 16:16:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AA47AC433D2; Wed, 28 Dec 2022 16:16:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672244192; bh=XfUw6PyYJpxjAdrmcyQVFb7XdAjV8j8X6jiNVwyqxL8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Tp7yVFAu+VqeXBmZYKJV3er32s21pF3xLOM9Helq5kAwO5KDBCTQwC6BRikd7GXwv 7pBJP3MPppRI8AIITi2Z2sV+vcjeKa9u31HK8CT8Z1UUaDyW1yJJ61Pz4fMVL6N4ju 7hJyFZjFhRNsbxTqrHsxmtR8o4UGFaPsZOdsH1dw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Duoming Zhou , Sasha Levin Subject: [PATCH 6.0 0666/1073] drivers: staging: r8188eu: Fix sleep-in-atomic-context bug in rtw_join_timeout_handler Date: Wed, 28 Dec 2022 15:37:34 +0100 Message-Id: <20221228144346.132671599@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144328.162723588@linuxfoundation.org> References: <20221228144328.162723588@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Duoming Zhou [ Upstream commit ce8cc75c7419ad54cb99437543a54c97c7446db5 ] The rtw_join_timeout_handler() is a timer handler that runs in atomic context, but it could call msleep(). As a result, the sleep-in-atomic-context bug will happen. The process is shown below: (atomic context) rtw_join_timeout_handler _rtw_join_timeout_handler rtw_do_join rtw_select_and_join_from_scanned_queue rtw_indicate_disconnect rtw_lps_ctrl_wk_cmd lps_ctrl_wk_hdl LPS_Leave LPS_RF_ON_check msleep //sleep in atomic context Fix by removing msleep() and replacing with mdelay(). Fixes: 15865124feed ("staging: r8188eu: introduce new core dir for RTL8188eu driver") Signed-off-by: Duoming Zhou Link: https://lore.kernel.org/r/20221018083424.79741-1-duoming@zju.edu.cn Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/staging/r8188eu/core/rtw_pwrctrl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/r8188eu/core/rtw_pwrctrl.c b/drivers/staging/r8188eu/core/rtw_pwrctrl.c index 10550bd2c16d..abfd14bfd5fb 100644 --- a/drivers/staging/r8188eu/core/rtw_pwrctrl.c +++ b/drivers/staging/r8188eu/core/rtw_pwrctrl.c @@ -273,7 +273,7 @@ static s32 LPS_RF_ON_check(struct adapter *padapter, u32 delay_ms) err = -1; break; } - msleep(1); + mdelay(1); } return err; -- 2.35.1