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SubjectRe: [RFC][PATCH] Security: fix cap_file_mmap() off-by-one error to avoid kernel null pointer exploit
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> The fix to the comment is fine, but you missed the point ENTIRELY.
i'll send a new patch only fix the comment.

> The WHOLE point of being able to set dac_mmap_min_addr == 0 is so you can
> disable the protection.  There exist tools (wine and dosemu) which NEED
> to map the 0 page.
thanks for explain it, i really understood wrong before.
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