APPLIED(B,D,E)/cmt: [SRU B/D/E/F] CVE-2020-10757

[Khaled Elmously]

Applied to BDE. Was already in F as part of 

https://bugs.launchpad.net/bugs/1882802



On 2020-06-10 17:51:52 , Thadeu Lima de Souza Cascardo wrote:
> [Impact/Description]
>  User can control PTE value to read/write anywhere, when "mremap" a
>  hugepage mmaped DAX file to a mmaped anonymous memory region
> 
> [Test case]
> Mounted a DAX filesystem with an emulated PMEM device and ran reproducer
> as in oss-sec message.
>  https://www.openwall.com/lists/oss-security/2020/06/04/4
> 
> Tested on Bionic, Eoan and Focal kernels.
> 
> [Regression potential]
> Could mostly break DAX, though the test case cover some of it.
> 
> 
> 
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