From: David Gibson <da...@gibson.dropbear.id.au>
The standard way of setting an empty property using libfdt is:
fdt_setprop(fdt, nodeoffset, propname, NULL, 0);
However, the implementation of this includes an unconditional:
memcpy(prop->data, NULL, 0);
Which although it will be a no-op (which is what we want) on many platforms
is technically undefined behaviour. Correct this, so that when passing
a 0 length, passing a NULL pointer as the value to fdt_setprop() is
definitely safe. This should quiet static checkers which complain about
this.
Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
---
cpukit/dtc/libfdt/fdt_rw.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/cpukit/dtc/libfdt/fdt_rw.c b/cpukit/dtc/libfdt/fdt_rw.c
index 2eed4f5838..3fd5847377 100644
--- a/cpukit/dtc/libfdt/fdt_rw.c
+++ b/cpukit/dtc/libfdt/fdt_rw.c
@@ -283,7 +283,8 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
if (err)
return err;
- memcpy(prop->data, val, len);
+ if (len)
+ memcpy(prop->data, val, len);
return 0;
}
--
2.13.7
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