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 196C117A303; Tue, 26 Aug 2025 12:55:22 +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=1756212923; cv=none; b=I4oj4RCXHvkiMD9AhRnL7pTknC9iiTyt7aOnT1nz9HTxq3hz+wdvQDHUtz+V0o5fDK9mzceIYdznJfCfSeWqv97QxMh8fwXMnTiwGRE3SmXCIUNAnvbaWHLygYD3FXt0MG/5GJ5/Abox5+J9tL16SFL8kn6Uwk1qpyaKLp6e4Is= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756212923; c=relaxed/simple; bh=ux/gCWa1dt4gruud99HseJaVtyeF99IJrIkJft61kyw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LNoeRLEiqJbbdmHcxbHWmpWLq4M83rCBhq0nWgyLvr+IF6H9dyWmOd87HhA1vegwpq5vclQqhRIrIQB+kHJZOUApxpsJBF0aeY94151w/pPjijoVgXrzgPtID3mEsu3ghWeAluZ94OCNJdQQ8CFN6kZCdY8F+YtriVCWYeX2Qdg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=jsWPAku8; 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="jsWPAku8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5D796C4CEF1; Tue, 26 Aug 2025 12:55:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756212922; bh=ux/gCWa1dt4gruud99HseJaVtyeF99IJrIkJft61kyw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jsWPAku8MjaAIOaRlPAFwKH/Xe/YasPzQndxKaGhQ+xbstbploQNK56pCEojB6Jhx K6+QQ/eUCJ2/wbrLtwrZ5E0ER9/goOnoV49DCEgJfxA1R14UyYf2UbENNmgh0jdC0A rW0t8y+oB6EvUSWKMclQpUpHAGH2mgPusrBY9NTA= 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 6.6 152/587] arm64: Mark kernel as tainted on SAE and SError panic Date: Tue, 26 Aug 2025 13:05:01 +0200 Message-ID: <20250826110956.815824180@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110952.942403671@linuxfoundation.org> References: <20250826110952.942403671@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 6.6-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 8b70759cdbb9..610f8a1099f5 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -953,6 +953,7 @@ 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 2e5d1e238af9..893b9485b840 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -753,6 +753,7 @@ 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