linux

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Maxim Patlasov cfc9fde0b0 ovl: verify upper dentry in ovl_remove_and_whiteout()

The upper dentry may become stale before we call ovl_lock_rename_workdir.
For example, someone could (mistakenly or maliciously) manually unlink(2)
it directly from upperdir.

To ensure it is not stale, let's lookup it after ovl_lock_rename_workdir
and and check if it matches the upper dentry.

Essentially, it is the same problem and similar solution as in
commit 11f3710417d0 ("ovl: verify upper dentry before unlink and rename").

Signed-off-by: Maxim Patlasov <mpatlasov@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org>

2016-07-22 10:54:20 +02:00

copy_up.c

ovl: override creds with the ones from the superblock mounter

2016-05-27 08:55:26 +02:00

dir.c

ovl: verify upper dentry in ovl_remove_and_whiteout()

2016-07-22 10:54:20 +02:00

inode.c

ovl: Copy up underlying inode's ->i_mode to overlay inode

2016-07-04 16:49:48 +02:00

Kconfig

ovl: rename filesystem type to "overlay"