On Thu, 30 Mar 2023 09:13:16 +0200, Christian Brauner wrote: > When cleaning up peer group ids in the failure path we need to make sure > to hold on to the namespace lock. Otherwise another thread might just > turn the mount from a shared into a non-shared mount concurrently. > > Ok, syzbot is happy with this as well so let's get this fixed and backported, tree: git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping.git branch: vfs.misc.fixes [1/1] fs: drop peer group ids under namespace lock commit: cb2239c198ad9fbd5aced22cf93e45562da781eb