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 716DD17CA12; Mon, 10 Mar 2025 17:51:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741629066; cv=none; b=GVJFo5CAx930nHms7Vd92Gy8WfBVRm7dptMV16s4/Ld6RCYG3++KAug+b20T6ljwaiZpE29L69tvJEFVimFKhWdrQ0kkGZcE7dKY4pvKBbqqlmMKCgtmgQD5aRTC8k+62zN2uwIuF/PN3N3T0vKzoF7evh2emMwSVGf6002WZWM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741629066; c=relaxed/simple; bh=4n1HEHpN55C7bQkCmyKDm60yK/qjW6fKH/9NO64qdVM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VSgg/T/KMB2zGhqJEsyw2lRSjrnyh0VryU7NcbieEngL9IhSkrldIPbLipToiIkySoDbix34qJH4vAQOu+Huejb9LC9Oo4+c6ybrOhnf0Z/AqPYoA9QBm9SgYHPssyjv/6RGOJRBRGsjLc3XpLC8pm8pKMsjsxROQxh04VMxPyQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=pFxu8FmH; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="pFxu8FmH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EBBA6C4CEE5; Mon, 10 Mar 2025 17:51:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1741629066; bh=4n1HEHpN55C7bQkCmyKDm60yK/qjW6fKH/9NO64qdVM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pFxu8FmH2njpxx39DWBTsYKQLgy7VFP1yTVBvbdCpnBfjufGTFbcAjUGHSnJSVYzA F8fhDe1lzCjUPLIHpVlSDAo2Xse7T68ebCXi/4TzhBILI4WoKjcpuiDWu1TCpL7sBn 0Znsk9rSJgI8itq5lxiGMlL/mNuRdkhC18WsFzV4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Wentao Liang , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 5.15 165/620] PM: hibernate: Add error handling for syscore_suspend() Date: Mon, 10 Mar 2025 18:00:11 +0100 Message-ID: <20250310170552.134750996@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250310170545.553361750@linuxfoundation.org> References: <20250310170545.553361750@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wentao Liang [ Upstream commit e20a70c572539a486dbd91b225fa6a194a5e2122 ] In hibernation_platform_enter(), the code did not check the return value of syscore_suspend(), potentially leading to a situation where syscore_resume() would be called even if syscore_suspend() failed. This could cause unpredictable behavior or system instability. Modify the code sequence in question to properly handle errors returned by syscore_suspend(). If an error occurs in the suspend path, the code now jumps to label 'Enable_irqs' skipping the syscore_resume() call and only enabling interrupts after setting the system state to SYSTEM_RUNNING. Fixes: 40dc166cb5dd ("PM / Core: Introduce struct syscore_ops for core subsystems PM") Signed-off-by: Wentao Liang Link: https://patch.msgid.link/20250119143205.2103-1-vulab@iscas.ac.cn [ rjw: Changelog edits ] Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- kernel/power/hibernate.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index 9abc73d500fbf..747c856411e39 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -593,7 +593,11 @@ int hibernation_platform_enter(void) local_irq_disable(); system_state = SYSTEM_SUSPEND; - syscore_suspend(); + + error = syscore_suspend(); + if (error) + goto Enable_irqs; + if (pm_wakeup_pending()) { error = -EAGAIN; goto Power_up; @@ -605,6 +609,7 @@ int hibernation_platform_enter(void) Power_up: syscore_resume(); + Enable_irqs: system_state = SYSTEM_RUNNING; local_irq_enable(); -- 2.39.5