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CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF: zero-init structs passed by reference (strong)

General informations

The Linux kernel configuration item CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF:

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Zero-initialize any structures on the stack that may be passed by reference and had not already been explicitly initialized. This can prevent most classes of uninitialized stack variable exploits and information exposures, like CVE-2017-1000410: https://git.kernel.org/linus/06e7e776ca4d3654

As a side-effect, this keeps a lot of variables on the stack that can otherwise be optimized out, so combining this with KASAN_STACK can lead to a stack overflow and is disallowed.

Hardware

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