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 DAF8A322A17; Mon, 18 Aug 2025 13:26:34 +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=1755523594; cv=none; b=WZU5s4o0jcXZGt7OkUCc4tXpovtOeYPeTdCeolQh04RjyVQVp4/ebqEelt6R2tOZIlyf7lIJpIrYp/q2ZCMaJDzpzNfCGhDTUjdBWasYTh3UTBIcFsqHLPMIbudcSIXFow7vPsAJc+vhrgXGGXJwaddi5IZtSvllalnlqvb5VVs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755523594; c=relaxed/simple; bh=UAEqtI4rTMYszST2u6A/ozFCPIvx/njJRap91r99nQQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nPdY7Djdyoq/q5Mfm/N4DDtscgMZBQvkHUdoboWBvH0ZD86ZTnVCaeJp5rknOmUQeSXXmlke9xf2909J8bly/qSIa5U+sWoabLa/MkBeALceIVmcjldpnK5JObSu7YsPo63CyBpUAR4QzZ8I/JO+vsLBZ5y5KbmJ2AMMJsVp32Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=j9C7t5j7; 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="j9C7t5j7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 524C0C4CEEB; Mon, 18 Aug 2025 13:26:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755523594; bh=UAEqtI4rTMYszST2u6A/ozFCPIvx/njJRap91r99nQQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j9C7t5j7UkMYxEmwZuTDXpQ7NFzz+GynXMnsWKFqk1N5bPN1IBdZOtkNdsERMvAiv pOcxDmKUxm8vkVuH096Bro7LjOK5xMxwX8wMzF/y+7ve9nkgwEMtiXCMgp1ERG4dae x6+DCe1zTQAT0YuopicLg7IcSDF60PkTUXZPOlsk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Breno Leitao , Mark Rutland , Will Deacon , Sasha Levin Subject: [PATCH 6.15 218/515] arm64: Mark kernel as tainted on SAE and SError panic Date: Mon, 18 Aug 2025 14:43:24 +0200 Message-ID: <20250818124506.761175992@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250818124458.334548733@linuxfoundation.org> References: <20250818124458.334548733@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 6.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Breno Leitao [ Upstream commit d7ce7e3a84642aadf7c4787f7ec4f58eb163d129 ] Set TAINT_MACHINE_CHECK when SError or Synchronous External Abort (SEA) interrupts trigger a panic to flag potential hardware faults. This tainting mechanism aids in debugging and enables correlation of hardware-related crashes in large-scale deployments. This change aligns with similar patches[1] that mark machine check events when the system crashes due to hardware errors. Link: https://lore.kernel.org/all/20250702-add_tain-v1-1-9187b10914b9@debian.org/ [1] Signed-off-by: Breno Leitao Acked-by: Mark Rutland Link: https://lore.kernel.org/r/20250716-vmcore_hw_error-v2-1-f187f7d62aba@debian.org Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/kernel/traps.c | 1 + arch/arm64/mm/fault.c | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 529cff825531..35eed1942d85 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -931,6 +931,7 @@ void __noreturn panic_bad_stack(struct pt_regs *regs, unsigned long esr, unsigne void __noreturn arm64_serror_panic(struct pt_regs *regs, unsigned long esr) { + add_taint(TAINT_MACHINE_CHECK, LOCKDEP_STILL_OK); console_verbose(); pr_crit("SError Interrupt on CPU%d, code 0x%016lx -- %s\n", diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index 11eb8d1adc84..f590dc71ce99 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -838,6 +838,7 @@ static int do_sea(unsigned long far, unsigned long esr, struct pt_regs *regs) */ siaddr = untagged_addr(far); } + add_taint(TAINT_MACHINE_CHECK, LOCKDEP_STILL_OK); arm64_notify_die(inf->name, regs, inf->sig, inf->code, siaddr, esr); return 0; -- 2.39.5