Re: [PATCH 0/7] (mainly) xz imports from Linux

[Ian Jackson <iwj@xxxxxxxxxxxxxx>]

Jan Beulich writes ("[PATCH 0/7] (mainly) xz imports from Linux"):
> While going through their 5.15.3 log I did notice two changes, which made
> me go check what else we might be missing. The series here is the result.
> Linux has also updated zstd, but that includes a pretty large change which
> I'm not ready to deal with right now. Them moving closer to the upstream
> zstd sources is certainly a good thing, so I suppose sooner or later we
> will want to follow them in doing so.
> 
> 1: xz: add fall-through comments to a switch statement
> 2: xz: fix XZ_DYNALLOC to avoid useless memory reallocations
> 3: decompressors: fix spelling mistakes
> 4: xz: avoid overlapping memcpy() with invalid input with in-place 
> decompression
> 5: xz: fix spelling in comments
> 6: xz: move s->lzma.len = 0 initialization to lzma_reset()
> 7: xz: validate the value before assigning it to an enum variable

FTAOD I think none of these are critical bug fixes for 4.16.
Please let me know if I'm wrong.

In theory 4 is UB but in practice the result is presumably just wrong
answers.

Ian.