[PATCH v4 0/2] udf: Fix race between file type conversion and writeback

[Jan Kara <jack@suse.cz>]

Hello,

here is the third version of patches to fix a race between conversion of UDF
file from inline format to the standard format and writeback resulting in
possible memory corruption. As Christoph didn't like opencoding
folio_prepare_writeback() in UDF either, this version provides
mpage_writepages() variant with a per-folio callback instead. Review/Acks are
welcome in particular for the first patch. I'd like to push the fix to Linus
soon as it's kind of nasty issue.

Changes since v3:
* Create mpage_writepages() variant with a callback instead of opencoding.

Changes since v2:
* Opencoded folio_prepare_writeback() in udf instead of exporting it

Changes since v1:
* Fix crash in udf_writepages() when file had no folio in the mapping


								Honza
Previous versions:
Link: http://lore.kernel.org/r/20260323162617.2421-1-jack@suse.cz # v1
Link: http://lore.kernel.org/r/20260324105132.30490-1-jack@suse.cz # v2