This bug was fixed in the package linux - 5.2.0-8.9
---------------
linux (5.2.0-8.9) eoan; urgency=medium
* linux: 5.2.0-8.9 -proposed tracker (LP: #1835700)
* Miscellaneous Ubuntu changes
- [Packaging] replace zfs and spl build with zfs 0.8.1-1ubuntu1
- SAUCE: test_bpf: remove expected fail for Ctx heavy transformations test
on
s390
- SAUCE: add -fcf-protection=none to retpoline flags
- SAUCE: usbip: ensure strings copied using strncpy are null-terminated
- SAUCE: usbip: add -Wno-address-of-packed-member to EXTRA_CFLAGS
- SAUCE: perf jvmti: ensure strncpy result is null-terminated
- update dkms package versions
- add removed zfs modules to modules.ignore
[ Upstream Kernel Changes ]
* Rebase to v5.2
-- Seth Forshee <[email protected]> Mon, 08 Jul 2019 07:13:41
-0500
** Changed in: linux (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1832316
Title:
shiftfs: allow changing ro/rw for subvolumes
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Disco:
Fix Committed
Bug description:
SRU Justification
Impact: Stéphane reported regression for btrfs workloads employing shiftfs.
Unprivileged users can already toggle whether a subvolume will be ro or
rw. This is broken on current shiftfs as we haven't whitelisted these
ioctls().
Fix: To enable this with shiftfs we need to whitelist BTRFS_IOC_FS_INFO,
BTRFS_IOC_SUBVOL_GETFLAGS, BTRFS_IOC_SUBVOL_SETFLAGS. All of them should
be safe for unprivileged users.
Regression Potential: Limited to shiftfs.
Test Case: Tested with LXD running shiftfs on top of btrfs and verified
btrfs subvolumes can be made ro or rw.
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