Fixes: d24b8a5 ("UBUNTU: SAUCE: overlayfs: allow with shiftfs as underlay")
But it isn't in the 5.13 branch:
$ git log --pretty=oneline origin/azure-5.13-next fs/overlayfs/file.c
1e6145d8708c831d2aa5c26aa15eb98e1a1683b9 ovl: fix use after free in struct ovl_aio_req
7b5bda27d1fc4d7bde20cf6ed203fe88c458169a ovl: fix IOCB_DIRECT if underlying fs doesn't support direct IO
1626e7f7ab7eb74e142fec7fe6b7c9614972a56b ovl: fix deadlock in splice write
1443bc4a25ca84d60d39a8ae1dc6215abdd637a4 UBUNTU: SAUCE: overlayfs: allow with shiftfs as underlay
The next patch has not been ported to the the 5.13 branch:
$ git show Ubuntu- azure-5. 8-5.8.0- 1033.35_ 20.04.1~ 656 c66d7d8145dd6b3 a5886b3e56
commit 5f5716d1f7ece06
Author: Alexander Mikhalitsyn <email address hidden>
Date: Mon Apr 26 10:11:00 2021 +0200
UBUNTU: SAUCE: overlayfs: fix incorrect mnt_id of files opened from map_files
BugLink: https:/ /bugs.launchpad .net/bugs/ 1857257
...
Fixes: d24b8a5 ("UBUNTU: SAUCE: overlayfs: allow with shiftfs as underlay")
But it isn't in the 5.13 branch:
$ git log --pretty=oneline origin/ azure-5. 13-next fs/overlayfs/file.c d2aa5c26aa15eb9 8e1a1683b9 ovl: fix use after free in struct ovl_aio_req bde20cf6ed203fe 88c458169a ovl: fix IOCB_DIRECT if underlying fs doesn't support direct IO e142fec7fe6b7c9 614972a56b ovl: fix deadlock in splice write 60d39a8ae1dc621 5abdd637a4 UBUNTU: SAUCE: overlayfs: allow with shiftfs as underlay
1e6145d8708c831
7b5bda27d1fc4d7
1626e7f7ab7eb74
1443bc4a25ca84d