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 D461D12DDA1; Mon, 18 Aug 2025 13:00:52 +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=1755522052; cv=none; b=okMP6sp3uFTdDQZosJ3jWW7P7wlQGUWW5kE8aC/TYolBEgcoC8BYo201H4jMEDj7v/TDUGvt+LAth3JaxW1fRBatvNXkru8/IxkTuKY7rk5Y9fhHzN/yIzpOroAZ5MTDM8HHW6sa+777ISnf7ptiJDtPF5IcDtkt9Fzq5IgSsbc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755522052; c=relaxed/simple; bh=4lMs02/2t853vVRJ+dpOwRwKp/SzNk3TY2apRC/TkTM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=R44qJrQqosrdWzoMeXZuA0asa73M61CGaYlx3LL2JwpH/syPc/6ucdZRXb1JNY/TbDkg+kEdU6hHCIiA4bg07fYk2KAMdU4LnQgEqt1Q/DYdX383XuCiBTcLp2v6D+1205dX22h1KuOv8lyY0LNK6eEb4ifFRxd3MdEVCM0vWXc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=qCceGfTG; 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="qCceGfTG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 438A1C4CEF1; Mon, 18 Aug 2025 13:00:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755522052; bh=4lMs02/2t853vVRJ+dpOwRwKp/SzNk3TY2apRC/TkTM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qCceGfTGCc1ZRmXkTvcvpWNo6u0CtAJqfXMsZyvHyjGrIfE7WsfckfuPpzU7DKK+d ZkDzfiIv5nR7oZwDfupAnEqvBXHrG9rSs7LxN1IX4J3Dn6JvStCf1ZkzZmOLxXllI0 1cQ36BiYoFWZMSTRlgJpkpzzxnTizznOlvBpX5lE= 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 6.12 183/444] arm64: Mark kernel as tainted on SAE and SError panic Date: Mon, 18 Aug 2025 14:43:29 +0200 Message-ID: <20250818124455.732906201@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250818124448.879659024@linuxfoundation.org> References: <20250818124448.879659024@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 6.12-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 563cbce11126..e2e8ffa65aa5 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -921,6 +921,7 @@ 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 850307b49bab..2d1ebc0c3437 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -798,6 +798,7 @@ 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