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 4A471221F1F; Tue, 17 Jun 2025 15:36:33 +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=1750174593; cv=none; b=uNMh4OpYJMVQn1MveGCbyovAz+2Hu4+49EfHijC2KWrsdMYMWlhAfgf22j9jOTRFOo6WJgAHbu8SuTrQn/Nj/RopvBiKPkzAaTQF+07DlAcR/YsTotXvt1rcSU2nMkOycr4uv/6Pse5AlIdlVjGT21Q+DmwOOZM0AvLS6HUpVPU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750174593; c=relaxed/simple; bh=Q0LzwnXv9I0RY5s+HfZfaZh5zPXIbkgWaBYuupY5pEg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ekNSIAsAKb5aRWPxo1FD0z9GIxVjWnBwXkVJjIlQUdJM5GLtZ4r+9eW8WMidCT8E9CwwSN78AvY8p6MXsdXmfulH/fh6NaKyIErPDUZKjjrqVG/wsw8Sa53CIwV4EWUyVTeCDjpY9nLeCnAu4+jDVg1LcF5Jm1gH9vl/SIiNs1U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=IT7jtqjL; 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="IT7jtqjL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9CEE3C4CEF0; Tue, 17 Jun 2025 15:36:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750174593; bh=Q0LzwnXv9I0RY5s+HfZfaZh5zPXIbkgWaBYuupY5pEg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IT7jtqjL+Rpm/BnnDvm5JrrGGuanWHxAyC4USFx43lMDEFPrY/Usi7iGtWW7YhW19 uuYl1BxbbiZo7ZyRGTdLFDb/ciHEX304skF/iMp4iOS7vzKBEKIIrafJXb92G2I5V5 vI0yB9yTmPuZZ/w9SUplqZRWDm6wyZzRKaD9RUJ0= 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 6.12 040/512] EDAC/skx_common: Fix general protection fault Date: Tue, 17 Jun 2025 17:20:06 +0200 Message-ID: <20250617152421.170613770@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250617152419.512865572@linuxfoundation.org> References: <20250617152419.512865572@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 6.12-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 85ec3196664d3..88f5ff249f2e0 100644 --- a/drivers/edac/skx_common.c +++ b/drivers/edac/skx_common.c @@ -115,6 +115,7 @@ EXPORT_SYMBOL_GPL(skx_adxl_get); void skx_adxl_put(void) { + adxl_component_count = 0; kfree(adxl_values); kfree(adxl_msg); } -- 2.39.5