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 997E824EA9D; Mon, 23 Jun 2025 13:27:42 +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=1750685262; cv=none; b=NWhPzhUgV1QeXr2BH0tun6ekmc0Midz/D/j4amM4NfPNpkthBkJrWjvbrUR2rpYlgZ+6Lj3SOYnzXBLYUojr83/8ftRZ6cad28q17E1GavlBtB397yXwGvNpFjO5XDMx58Y4kh121Web4xw8s5ZkvGHGoRKvXdsaSNMfKcQIQJg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750685262; c=relaxed/simple; bh=qIcyf175drs8agcSUnRw4UpryP8n9ax6ALFUGwS0a/Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UZjjOxLfYAEa+8C6jp9z6SlFPxudcatWgltyTWKKKvH/P/ZPZvBeLhEbE00uSGpataUQhMOsBMgScW00beH49k7k4qBd8osBnso7MobCWAgSQcHSltV5IvDnhpJHoorjrS8oLN1YmslJtcXuLmNJY437VgVPS3pEtXAhZp+1+FE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=L+7zNVNn; 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="L+7zNVNn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2D2D0C4CEEA; Mon, 23 Jun 2025 13:27:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750685262; bh=qIcyf175drs8agcSUnRw4UpryP8n9ax6ALFUGwS0a/Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=L+7zNVNnaHZtfWyErm4R3yMKzrwMsPxZx5m2mm+9Km4qjF2bZroseozhZ0TRAem1Q dKckbQvapfkfmuz+qAcEYTxqENW1EXLvgX16Qv2ed0UKMeYIaicVyMLdB0tSHaa4Ig +1GVGCoXDriPBYqDNRy7Zwx2mvX/8OQ8Ru2kucq8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Feng Xu , Qiuxu Zhuo , Tony Luck , Sasha Levin Subject: [PATCH 5.15 021/411] EDAC/skx_common: Fix general protection fault Date: Mon, 23 Jun 2025 15:02:45 +0200 Message-ID: <20250623130633.636589176@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250623130632.993849527@linuxfoundation.org> References: <20250623130632.993849527@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: Qiuxu Zhuo [ Upstream commit 20d2d476b3ae18041be423671a8637ed5ffd6958 ] After loading i10nm_edac (which automatically loads skx_edac_common), if unload only i10nm_edac, then reload it and perform error injection testing, a general protection fault may occur: mce: [Hardware Error]: Machine check events logged Oops: general protection fault ... ... Workqueue: events mce_gen_pool_process RIP: 0010:string+0x53/0xe0 ... Call Trace: ? die_addr+0x37/0x90 ? exc_general_protection+0x1e7/0x3f0 ? asm_exc_general_protection+0x26/0x30 ? string+0x53/0xe0 vsnprintf+0x23e/0x4c0 snprintf+0x4d/0x70 skx_adxl_decode+0x16a/0x330 [skx_edac_common] skx_mce_check_error.part.0+0xf8/0x220 [skx_edac_common] skx_mce_check_error+0x17/0x20 [skx_edac_common] ... The issue arose was because the variable 'adxl_component_count' (inside skx_edac_common), which counts the ADXL components, was not reset. During the reloading of i10nm_edac, the count was incremented by the actual number of ADXL components again, resulting in a count that was double the real number of ADXL components. This led to an out-of-bounds reference to the ADXL component array, causing the general protection fault above. Fix this issue by resetting the 'adxl_component_count' in adxl_put(), which is called during the unloading of {skx,i10nm}_edac. Fixes: 123b15863550 ("EDAC, i10nm: make skx_common.o a separate module") Reported-by: Feng Xu Signed-off-by: Qiuxu Zhuo Signed-off-by: Tony Luck Tested-by: Feng Xu Link: https://lore.kernel.org/r/20250417150724.1170168-2-qiuxu.zhuo@intel.com Signed-off-by: Sasha Levin --- drivers/edac/skx_common.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/edac/skx_common.c b/drivers/edac/skx_common.c index 88c44d5359076..46eeaa142a610 100644 --- a/drivers/edac/skx_common.c +++ b/drivers/edac/skx_common.c @@ -112,6 +112,7 @@ EXPORT_SYMBOL_GPL(skx_adxl_get); void skx_adxl_put(void) { + adxl_component_count = 0; kfree(adxl_values); kfree(adxl_msg); } -- 2.39.5