ovl: unbless lower st_ino of unverified origin

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On a malformed overlay, several redirected dirs can point to the same
dir on a lower layer. This presents a similar challenge as broken
hardlinks, because different objects in the overlay can return the same
st_ino/st_dev pair from stat(2).

For broken hardlinks, we do not provide constant st_ino on copy up to
avoid this inconsistency. When NFS export feature is enabled, apply
the same logic to files and directories with unverified lower origin.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

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Amir Goldstein 2017-11-21 13:55:51 +02:00 • committed by Miklos Szeredi

parent 37b12916c0

commit 86eaa13046

1 changed files with 12 additions and 4 deletions

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16

fs/overlayfs/inode.c

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