linux-kernel - [PATCH v4 1/4] x86/devicetree: Initialize device tree before using it

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <c8c7e941efc63b5d25ebf9b6350b0f3df38f6098.1520450752.git.ivan.gorinov@intel.com>
Date:   Wed, 7 Mar 2018 11:46:29 -0800
From:   Ivan Gorinov <ivan.gorinov@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH v4 1/4] x86/devicetree: Initialize device tree before using it

Commit 08d53aa58cb162e6 ("of/fdt: export fdt blob as /sys/firmware/fdt")
adds CRC32 calculation in early_init_dt_verify() and checking in late
initcall of_fdt_raw_init(), making early_init_dt_verify() mandatory.
Required call to early_init_dt_verify() was not added to the x86-specific
implementation, causing failure to create sysfs entry in of_fdt_raw_init().

Signed-off-by: Ivan Gorinov <ivan.gorinov@...el.com>
---
 arch/x86/kernel/devicetree.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index 25de5f6..63d2ebc 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -11,6 +11,7 @@
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
 #include <linux/of_irq.h>
+#include <linux/libfdt.h>
 #include <linux/slab.h>
 #include <linux/pci.h>
 #include <linux/of_pci.h>
@@ -270,14 +271,15 @@ static void __init x86_flattree_get_config(void)
 
 	map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
 
-	initial_boot_params = dt = early_memremap(initial_dtb, map_len);
-	size = of_get_flat_dt_size();
+	dt = early_memremap(initial_dtb, map_len);
+	size = fdt_totalsize(dt);
 	if (map_len < size) {
 		early_memunmap(dt, map_len);
-		initial_boot_params = dt = early_memremap(initial_dtb, size);
+		dt = early_memremap(initial_dtb, size);
 		map_len = size;
 	}
 
+	early_init_dt_verify(dt);
 	unflatten_and_copy_device_tree();
 	early_memunmap(dt, map_len);
 }
-- 
2.7.4