[PATCH] fdt_get_phandle: Return invalid phandles as 0

["Pierre-Clément Tosi" <ptosi@xxxxxxxxxx>]

If a tree contains an invalid <u32> value as its <phandle> property,
mask it with '0' (invalid value) instead of returning it from
fdt_get_phandle().

Signed-off-by: Pierre-Clément Tosi <ptosi@xxxxxxxxxx>
---
 libfdt/fdt_ro.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/libfdt/fdt_ro.c b/libfdt/fdt_ro.c
index 9f6c551..7d1da6d 100644
--- a/libfdt/fdt_ro.c
+++ b/libfdt/fdt_ro.c
@@ -507,6 +507,7 @@ const void *fdt_getprop(const void *fdt, int nodeoffset,
 
 uint32_t fdt_get_phandle(const void *fdt, int nodeoffset)
 {
+	uint32_t phandle;
 	const fdt32_t *php;
 	int len;
 
@@ -519,7 +520,11 @@ uint32_t fdt_get_phandle(const void *fdt, int nodeoffset)
 			return 0;
 	}
 
-	return fdt32_ld_(php);
+	phandle = fdt32_ld_(php);
+	if (phandle > (uint32_t)FDT_MAX_PHANDLE)
+		phandle = 0;
+
+	return phandle;
 }
 
 const char *fdt_get_alias_namelen(const void *fdt,
-- 
2.37.1.455.g008518b4e5-goog