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SubjectRe: Kernel errors with overlay filesystem v22
Date

This sequence of commands produces both errors:

mount -t tmpfs lower_layer /lower
mount -t tmpfs upper_layer /upper
mkdir /upper/upper
mkdir /upper/work
mount -t overlayfs overlayfs /mnt -olowerdir=/lower,upperdir=/upper/upper,workdir=/upper/work
# The lockdep error was reported in the above mount command
umount /mnt
umount /upper
# The dentry leak error was reported in the last umount command

where /lower, /upper and /mnt are preexisting directories.

Note that prior to this, mounting and unmounting a tmpfs filesystem worked
with no errors.

David


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