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 D5FD1350D54; Tue, 26 Aug 2025 13:53:24 +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=1756216404; cv=none; b=uZrrsDzvKI28eRzteRSLDfoV9nVS4PkEGFLl6I4NJTSyE3jTRwZkJr2L6rxQS9u2smH6yDTt2cTWuVBusO01Jbzhtf0h+FcTdpwfcr8hbDKOcWlkVX8MRmYjVNfHifTTTWsPHjxgjDiewDXjXUJHtZmD0zGNcdisVzFcYXevBSc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756216404; c=relaxed/simple; bh=6NFMBSEUHzo85Oh6w4PXDR48KZykZz+kGqL2ORi0RY4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=i8tJGS6Ua18dl3ThLlx1f8VMXvB1LraOLe7atmxOyCZ89LPoGpT7rJzoKpjlUYaGn550T6npUNo4Y3Elj3YYkB8VOnJIzyDQpJwAxo79rpThRL/lkobi+hfJ7WTsm1NeyLBcjse5KZND/zef/L2/2W1HACKyVkgp0hw7kfnNuec= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=W7UluNDD; 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="W7UluNDD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 67B2BC113D0; Tue, 26 Aug 2025 13:53:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756216404; bh=6NFMBSEUHzo85Oh6w4PXDR48KZykZz+kGqL2ORi0RY4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W7UluNDDB44tXusiVsyfV3nq6fy0JYVS9boJRHBzGqKkx9dmWoRk8E60Lz+W1oKga zc++r27hhzf73MtCVrJrrmwkRCeDa62Mw2n4iDozPz2BWHUXfUGk+zVKlwIOaFaerV ALcXli6GOhBdiajgbcTzcvVwgQNBHULneIoQb89A= 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 5.15 345/644] arm64: Mark kernel as tainted on SAE and SError panic Date: Tue, 26 Aug 2025 13:07:16 +0200 Message-ID: <20250826110954.945779802@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110946.507083938@linuxfoundation.org> References: <20250826110946.507083938@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: 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 c71074cb2bef..6debe95f8a62 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -883,6 +883,7 @@ void panic_bad_stack(struct pt_regs *regs, unsigned long esr, unsigned long far) 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 632762039714..d293aac8c554 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -726,6 +726,7 @@ 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