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79b9e326a1
Ensure that the alias found matches the device tree specification v0.4:
Each property of the /aliases node defines an alias. The property
name specifies the alias name. The property value specifies the full
path to a node in the devicetree.
This protects against a stack overflow caused by
fdt_path_offset_namelen(fdt, path, namelen)
calling
fdt_path_offset(fdt, fdt_get_alias_namelen(fdt, path, namelen))
leading to infinite recursion on DTs with "circular" aliases.
This fix was originally written by Mike McTernan for Android in [1].
[1]: https://android.googlesource.com/platform/external/dtc/+/9308e7f9772bd226fea9925b1fc4d53c127ed4d5
Signed-off-by: Pierre-Clément Tosi <ptosi@google.com>
Acked-by: Mike McTernan <mikemcternan@google.com>
Message-ID: <20231010092725.63h7c45p2fnmj577@google.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
29 lines
442 B
Text
29 lines
442 B
Text
/dts-v1/;
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/ {
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#address-cells = <1>;
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#size-cells = <0>;
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aliases {
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empty = "";
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loop = "loop";
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nonull = [626164];
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relative = "s1/subsubnode";
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s1 = &sub1;
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ss1 = &subsub1;
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sss1 = &subsubsub1;
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};
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sub1: subnode@1 {
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compatible = "subnode1";
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reg = <1>;
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subsub1: subsubnode {
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compatible = "subsubnode1", "subsubnode";
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subsubsub1: subsubsubnode {
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compatible = "subsubsubnode1", "subsubsubnode";
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};
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};
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};
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};
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