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Description: mm/gup: fix FOLL_FORCE COW security issue and remove FOLL_COW
References:
https://lore.kernel.org/linux-mm/20220808073232.8808-1-david@redhat.com/
https://www.openwall.com/lists/oss-security/2022/08/08/1
Notes:
carnil> Commit fixes 9ae0f87d009c ("mm/shmem: unconditionally set pte
carnil> dirty in mfill_atomic_install_pte") in 5.16-rc1.
Bugs:
upstream: needed
5.10-upstream-stable: N/A "Vulnerable code introduced later"
4.19-upstream-stable: N/A "Vulnerable code introduced later"
sid: needed
5.10-bullseye-security: N/A "Vulnerable code introduced later"
4.19-buster-security: N/A "Vulnerable code introduced later"
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