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| author | Maxim Patlasov <mpatlasov@virtuozzo.com> | 2016-07-22 01:24:26 (GMT) |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2016-07-22 08:54:20 (GMT) |
| commit | cfc9fde0b07c3b44b570057c5f93dda59dca1c94 (patch) | |
| tree | 7f36d4f2a49719673c436767707d25ef5f5e9041 /ipc/util.c | |
| parent | 07a2daab49c549a37b5b744cbebb6e3f445f12bc (diff) | |
| download | linux-cfc9fde0b07c3b44b570057c5f93dda59dca1c94.tar.xz | |
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>
Diffstat (limited to 'ipc/util.c')
0 files changed, 0 insertions, 0 deletions