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Thu, 10 Jul 2025 03:46:55 -0700 (PDT) From: Breno Leitao Date: Thu, 10 Jul 2025 03:46:35 -0700 Subject: [PATCH] arm64: traps: Mark kernel as tainted on SError panic Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250710-arm_serror-v1-1-2a3def3740d7@debian.org> X-B4-Tracking: v=1; b=H4sIAAqab2gC/x3MWwqAIBAF0K0M9zvBrDDcSkSITjUfPRghgmjvQ WcB50FhFS4I9ED5kiLHjkB1RUhr3Bc2khEIzrrO+tqaqNtUWPVQ4/2cYp9943KLinAqz3L/2TC +7weXSEVdXAAAAA== X-Change-ID: 20250710-arm_serror-77fca8d732d4 To: Catalin Marinas , Will Deacon Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, osandov@fb.com, leo.yan@arm.com, rmikey@meta.com, Breno Leitao X-Mailer: b4 0.15-dev-dd21f X-Developer-Signature: v=1; a=openpgp-sha256; l=1231; i=leitao@debian.org; h=from:subject:message-id; bh=NZ9JWewDIpJuTxlD3Y6Io3nlZ3dqQ52JIgXmz5U9mV0=; b=owEBbQKS/ZANAwAIATWjk5/8eHdtAcsmYgBob5oeoFlOCtV1wQ4BKu2P6QjzzQrcQ7yIvOeHt uBPUc4MA/WJAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCaG+aHgAKCRA1o5Of/Hh3 bdz8D/4hCtVkn3bLmZOGXYjNhCn//p66gXF6gUi9vJkE50F15RQLs4ZMcNxTlMZ2jkp3MVcGWPc LU2DjpokdABLZu2XwLu+YF07c0qz87O6AsFaTXksx01GBzTSjWndJoMxtFQ+criNNmY620oo3Oi 8MkPthH3Ci8SBZwwnLg1D95UIZtQfUgee7diT3Q6waeIM+a/ytZoWxP6ZqvxqSkYWSIzCGJD+Wj lj+xBD4skkXPpSb8ilSKAWDvHwZakMqwDMPb51Mbv7kV/IxoumcIHwWHNvnJ027kpre24C1aEFq ziq9YBFxyfJAr42qh2im5VM+PXAoLejEy/4rzVV/1JMgkWEdQyMNcG/F3V3jSCJC40sgpRh2wZX A/MZEgiHTXSiU4Kl7TJRYDNu7bxWLbYTBL0Y8ek6NO1v7YuOL5u3E39C9BhtPxJS18v92hzLtCm idaYBs6sb8Wumh7033T6urVmc4paeJdqPxjc9pLDxJ1ecSiLXvvLTaXgqrtlUujobr+za+2NH3h YTZd+R+7fk75SzmfX6OpexG9TiWK32D8xuhQUhvYJuj9IaBxgJmrxILpNhJc4QOrmb1uwA2wj2G 44ygpXD9uAll2f2675510KN1O8LihSlDylnODShFmLT5vED0yE6A0g75Z02ihrtTdqkY2moBNTt /JUCPecFGMDliHg== X-Developer-Key: i=leitao@debian.org; a=openpgp; fpr=AC8539A6E8F46702CA4A439B35A3939FFC78776D Set TAINT_MACHINE_CHECK when SError 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@debia= n.org/ [1] Signed-off-by: Breno Leitao --- arch/arm64/kernel/traps.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 9bfa5c944379d..7468b22585cef 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, u= nsigned long esr, unsigne =20 void __noreturn arm64_serror_panic(struct pt_regs *regs, unsigned long esr) { + add_taint(TAINT_MACHINE_CHECK, LOCKDEP_STILL_OK); console_verbose(); =20 pr_crit("SError Interrupt on CPU%d, code 0x%016lx -- %s\n", --- base-commit: 8c2e52ebbe885c7eeaabd3b7ddcdc1246fc400d2 change-id: 20250710-arm_serror-77fca8d732d4 Best regards, -- =20 Breno Leitao