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The Linux kernel configuration item CONFIG_UBSAN_OBJECT_SIZE
:
(! CONFIG_CC_IS_GCC ) && ($( CONFIG_cc-option,-fsanitize = CONFIG_object-size ))
This option enables -fsanitize=object-size which checks for accesses beyond the end of objects where the optimizer can determine both the object being operated on and its size, usually seen with bad downcasts, or access to struct members from NULL pointers.
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