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 19D0E21ABC1; Tue, 29 Apr 2025 17:49:45 +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=1745948986; cv=none; b=qBajvT4PzCAp4/qocO9EQCwbzDIA9Md1mW4V475LMo9K5vbc4Kw0e0eg1YWDgZJeEDf9lsN39MG+5+WxOhAP1JP4iRYT241UGxAHIpWjTmSgsVaAbspXaNoDmDyf6EurUqlr8a0Im32OFwJdcmYPzNxw1LbwuMZl61AMaUJhYHc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745948986; c=relaxed/simple; bh=WSMwajCTIJa5pi4fhBFdCeuREMJZb0S5vS3ZcteIGnk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DxNBJxOVhvxxw7gjj0t7Hf62zF0oWX9V6l82jYZc97aUqg+ETPMUn1XOBw9S0+LHuHyu7E+0w+eYAZL/mSWm64d4MyLxRh2d0fmXHZCTcCR3yg/dZZilp5Q6saclMfYGCQ3wEeTzU4Lp+/GPZYnhuSbKHf/UJVBXPmcbzAa8Jfk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Vd/jCMEc; 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="Vd/jCMEc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3AD97C4CEE3; Tue, 29 Apr 2025 17:49:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1745948985; bh=WSMwajCTIJa5pi4fhBFdCeuREMJZb0S5vS3ZcteIGnk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Vd/jCMEcN64M3viQr7wlkuDDIASKNTudqSzxJ30CAbaNJ4heFaobBKSZ0904IsPtH 6H6/GWBGqbI+2RegwsrUDLQFTKWn/Q8sNMO58eJnr7QTKkzQrGcs2CWN77G8NevjOJ bc4x5ibye7kFVtXlwXDVQH1/ygPsFEIqLqzHIrNw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Denis Arefev , Alex Deucher Subject: [PATCH 5.15 182/373] drm/amd/pm/powerplay/hwmgr/vega20_thermal: Prevent division by zero Date: Tue, 29 Apr 2025 18:40:59 +0200 Message-ID: <20250429161130.649868683@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250429161123.119104857@linuxfoundation.org> References: <20250429161123.119104857@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev 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: Denis Arefev commit 4e3d9508c056d7e0a56b58d5c81253e2a0d22b6c 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: 031db09017da ("drm/amd/powerplay/vega20: enable fan RPM and pwm settings V2") 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/vega20_thermal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_thermal.c +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_thermal.c @@ -191,7 +191,7 @@ int vega20_fan_ctrl_set_fan_speed_rpm(st uint32_t tach_period, crystal_clock_freq; int result = 0; - if (!speed) + if (!speed || speed > UINT_MAX/8) return -EINVAL; if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) {