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 3EAA71EEA3E; Wed, 23 Apr 2025 15:19:12 +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=1745421553; cv=none; b=Y/vGxKQeqsfcBaXvCwgtq/FWRcxJUBlkjEEjX2fKwH3f8OaLBA3//tmu1xLt+lADdfEFMjTNY7a/v3VWUzReSKzXyT5VV7/CFB9LN53POYIjyyYkw236hGAxbmBeMHrnqZDbZHUySd3aUtvCWABjn8VkM8UQcS8hu6l/3gjPjfs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745421553; c=relaxed/simple; bh=eFEnU+Kkkq6tzuYDBCLREcTe7om7U/XaldYBCCG+dxg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YsG9acInDwzip72fgTT+m6m6JY7Z3dn1XDII9WqIk+2ALhEvlRMevvy7JKZ5LXG3J7XKL4m5zTUksjXLZUWRMAZKiPyE5R/RsPHPSf7GLP5h6bXWoSmsYBTG/DXsvqKWVSOui+v9/VbQK05PYrzBITOen09f+QMMeDK84rn3QIk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=bcCaxTgB; 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="bcCaxTgB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 58D6DC4CEE2; Wed, 23 Apr 2025 15:19:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1745421552; bh=eFEnU+Kkkq6tzuYDBCLREcTe7om7U/XaldYBCCG+dxg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bcCaxTgB3x/AMK+04oWA2AVVzrexWVMt+SmuzXHass4FOkWQasIPhrBJY3vQT+yMv WLDkPg44neY5hpL8pcokeKy5ANzMd6PIOQ324Xm3GEch7Gdgm9TlMBMLS9nocsET3v zC9Le78RczgOjfYl9BxjcUUn/c8K2pvH0fR68+1c= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Denis Arefev , Alex Deucher Subject: [PATCH 6.14 186/241] drm/amd/pm/swsmu/smu13/smu_v13_0: Prevent division by zero Date: Wed, 23 Apr 2025 16:44:10 +0200 Message-ID: <20250423142628.114797795@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250423142620.525425242@linuxfoundation.org> References: <20250423142620.525425242@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 6.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Denis Arefev commit f23e9116ebb71b63fe9cec0dcac792aa9af30b0c 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: c05d1c401572 ("drm/amd/swsmu: add aldebaran smu13 ip support (v3)") 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/swsmu/smu13/smu_v13_0.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c @@ -1229,7 +1229,7 @@ int smu_v13_0_set_fan_speed_rpm(struct s uint32_t tach_period; int ret; - if (!speed) + if (!speed || speed > UINT_MAX/8) return -EINVAL; ret = smu_v13_0_auto_fan_control(smu, 0);