mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-15 02:44:23 -05:00
1eb373d1e0
Signed-off-by: Tad <tad@spotco.us>
42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Pierre-Cl=C3=A9ment=20Tosi?= <ptosi@google.com>
|
|
Date: Tue, 13 Sep 2022 16:58:15 +0100
|
|
Subject: [PATCH] libfdt: fdt_path_offset_namelen: Reject empty paths
|
|
|
|
Make empty paths result in FDT_ERR_BADPATH.
|
|
|
|
Per the specification (v0.4-rc4):
|
|
|
|
> The convention for specifying a device path is:
|
|
> /node-name-1/node-name-2/node-name-N
|
|
>
|
|
> The path to the root node is /.
|
|
>
|
|
> A unit address may be omitted if the full path to the
|
|
> node is unambiguous.
|
|
|
|
Bug: 246465319
|
|
Test: libfdt_fuzzer # clusterfuzz/testcase-detail/4530863420604416
|
|
Change-Id: I14ab0a074ab994c1f598243d2d5795d2cd9a853a
|
|
(cherry picked from commit 3c28f3e3a1724c288d19f1b1a139cf57bfe1af33)
|
|
(cherry picked from commit d10c84c4bc78e8ebd8c6ebf70126ad3cb0ba1c46)
|
|
Merged-In: I14ab0a074ab994c1f598243d2d5795d2cd9a853a
|
|
---
|
|
libfdt/fdt_ro.c | 3 +++
|
|
1 file changed, 3 insertions(+)
|
|
|
|
diff --git a/libfdt/fdt_ro.c b/libfdt/fdt_ro.c
|
|
index 3d00d2e..be8fd82 100644
|
|
--- a/libfdt/fdt_ro.c
|
|
+++ b/libfdt/fdt_ro.c
|
|
@@ -188,6 +188,9 @@ int fdt_path_offset_namelen(const void *fdt, const char *path, int namelen)
|
|
|
|
FDT_CHECK_HEADER(fdt);
|
|
|
|
+ if (namelen < 1)
|
|
+ return -FDT_ERR_BADPATH;
|
|
+
|
|
/* see if we have an alias */
|
|
if (*path != '/') {
|
|
const char *q = memchr(path, '/', end - p);
|