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.
Signed-off-by: Pierre-Clément Tosi <ptosi@xxxxxxxxxx>
---
libfdt/fdt_ro.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libfdt/fdt_ro.c b/libfdt/fdt_ro.c
index c4c520c..46b4ef5 100644
--- a/libfdt/fdt_ro.c
+++ b/libfdt/fdt_ro.c
@@ -255,6 +255,9 @@ int fdt_path_offset_namelen(const void *fdt, const char *path, int namelen)
FDT_RO_PROBE(fdt);
+ if (namelen < 1)
+ return -FDT_ERR_BADPATH;
+
/* see if we have an alias */
if (*path != '/') {
const char *q = memchr(path, '/', end - p);
--
2.42.0.609.gbb76f46606-goog
--
Pierre
