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Wed, 02 Oct 2019 10:03:50 -0700 (PDT) Received: from sudo.home ([2a01:cb1d:112:6f00:f145:3252:fc29:76c9]) by smtp.gmail.com with ESMTPSA id f18sm7085459wmh.43.2019.10.02.10.03.49 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 02 Oct 2019 10:03:49 -0700 (PDT) From: Ard Biesheuvel To: linux-efi@vger.kernel.org, Ingo Molnar , Thomas Gleixner Cc: Ard Biesheuvel , linux-kernel@vger.kernel.org, Ben Dooks , Dave Young , Jarkko Sakkinen , Jerry Snitselaar , linux-integrity@vger.kernel.org, Lukas Wunner , Lyude Paul , Matthew Garrett , Octavian Purdila , Peter Jones , Scott Talbert Subject: [PATCH 1/7] efi: cper: Fix endianness of PCIe class code Date: Wed, 2 Oct 2019 18:58:58 +0200 Message-Id: <20191002165904.8819-2-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191002165904.8819-1-ard.biesheuvel@linaro.org> References: <20191002165904.8819-1-ard.biesheuvel@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org From: Lukas Wunner The CPER parser assumes that the class code is big endian, but at least on this edk2-derived Intel Purley platform it's little endian: efi: EFI v2.50 by EDK II BIOS ID:PLYDCRB1.86B.0119.R05.1701181843 DMI: Intel Corporation PURLEY/PURLEY, BIOS PLYDCRB1.86B.0119.R05.1701181843 01/18/2017 {1}[Hardware Error]: device_id: 0000:5d:00.0 {1}[Hardware Error]: slot: 0 {1}[Hardware Error]: secondary_bus: 0x5e {1}[Hardware Error]: vendor_id: 0x8086, device_id: 0x2030 {1}[Hardware Error]: class_code: 000406 ^^^^^^ (should be 060400) Signed-off-by: Lukas Wunner Signed-off-by: Ard Biesheuvel --- drivers/firmware/efi/cper.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index addf0749dd8b..b1af0de2e100 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -381,7 +381,7 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie, printk("%s""vendor_id: 0x%04x, device_id: 0x%04x\n", pfx, pcie->device_id.vendor_id, pcie->device_id.device_id); p = pcie->device_id.class_code; - printk("%s""class_code: %02x%02x%02x\n", pfx, p[0], p[1], p[2]); + printk("%s""class_code: %02x%02x%02x\n", pfx, p[2], p[1], p[0]); } if (pcie->validation_bits & CPER_PCIE_VALID_SERIAL_NUMBER) printk("%s""serial number: 0x%04x, 0x%04x\n", pfx, -- 2.20.1