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 510D829B76A; Wed, 23 Apr 2025 15:35:50 +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=1745422551; cv=none; b=sffy4PZS1yQbUtumfyomcRCz7ZMCKiwvbw1fEuynT1HvmqqbqTXDAXk+sFUMqOEqHnrDb2k8OA6zg9uxqoIlmkoU3Ncq0kN0CRxJBAS5zWJ+G+gjaofLIOmz4p4GeO5ljvYAIyvZ6EG1Ifm6goT7kUT5xIVCdxP3UtfwvdHlCf4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745422551; c=relaxed/simple; bh=NcAp+v54+vdMUXC4vYLJd3nJskzjzKvG3sKAkTAH90E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AwSUNR6QC1MxJqYDdmIR9jaGi7y/0l72RyrI+fM3FNbvjOJQ5hNBKXtx7z9Zko+P5fVE+wTNK45+q/SL4gLk6AGzEXcLl1oc7dya5ngONow41YAq0tsr347lK8KgLy19tHsrO2gILk4LcDn65/Br5XErzZrfCHqtwiJ0mP2CEu8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=pLEF/QOQ; 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="pLEF/QOQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82BB5C4CEE3; Wed, 23 Apr 2025 15:35:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1745422550; bh=NcAp+v54+vdMUXC4vYLJd3nJskzjzKvG3sKAkTAH90E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pLEF/QOQKMYBGPL8PJli4HtQncT+A3dV4F03R6UUkDmjnkPHSMVbfRuOzMXVOs1/m 1EGOKpaXIrv+W9+qEUz/7gUZU5NrLLmRgimmh3VzXU3PzWXse/6WC4vh5UH+87jj0r dd84oql+J12lWGFUS5MQJk2hc+OSfDVUj9/TKEYQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Denis Arefev , Alex Deucher Subject: [PATCH 6.6 352/393] drm/amd/pm/powerplay/hwmgr/smu7_thermal: Prevent division by zero Date: Wed, 23 Apr 2025 16:44:08 +0200 Message-ID: <20250423142657.874273883@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250423142643.246005366@linuxfoundation.org> References: <20250423142643.246005366@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Denis Arefev commit 7c246a05df51c52fe0852ce56ba10c41e6ed1f39 upstream. The user can set any speed value. If speed is greater than UINT_MAX/8, division by zero is possible. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: c52dcf49195d ("drm/amd/pp: Avoid divide-by-zero in fan_ctrl_set_fan_speed_rpm") Signed-off-by: Denis Arefev Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_thermal.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_thermal.c +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_thermal.c @@ -267,10 +267,10 @@ int smu7_fan_ctrl_set_fan_speed_rpm(stru if (hwmgr->thermal_controller.fanInfo.bNoFan || (hwmgr->thermal_controller.fanInfo. ucTachometerPulsesPerRevolution == 0) || - speed == 0 || + (!speed || speed > UINT_MAX/8) || (speed < hwmgr->thermal_controller.fanInfo.ulMinRPM) || (speed > hwmgr->thermal_controller.fanInfo.ulMaxRPM)) - return 0; + return -EINVAL; if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) smu7_fan_ctrl_stop_smc_fan_control(hwmgr);