Commit 49e67dd1 authored by Johan Hovold's avatar Johan Hovold Committed by Rob Herring

of: fdt: add missing allocation-failure check

The memory allocator passed to __unflatten_device_tree() (e.g. a wrapped
kzalloc) can fail so add the missing sanity check to avoid dereferencing
a NULL pointer.

Fixes: fe140423 ("of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree")
Cc: stable <stable@vger.kernel.org>     # 2.6.38
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
parent 828d4cdd
...@@ -507,6 +507,9 @@ void *__unflatten_device_tree(const void *blob, ...@@ -507,6 +507,9 @@ void *__unflatten_device_tree(const void *blob,
/* Allocate memory for the expanded device tree */ /* Allocate memory for the expanded device tree */
mem = dt_alloc(size + 4, __alignof__(struct device_node)); mem = dt_alloc(size + 4, __alignof__(struct device_node));
if (!mem)
return NULL;
memset(mem, 0, size); memset(mem, 0, size);
*(__be32 *)(mem + size) = cpu_to_be32(0xdeadbeef); *(__be32 *)(mem + size) = cpu_to_be32(0xdeadbeef);
......
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