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| author | Miklos Szeredi <mszeredi@redhat.com> | 2016-07-29 12:05:24 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2016-07-29 12:05:24 +0200 |
| commit | 76bc8e2843b66f8205026365966b49ec6da39ae7 (patch) | |
| tree | 9ec472578011e1a87ded786bfa2a0ded740b3b24 /fs/overlayfs | |
| parent | 656189d207f0ed267f41338f7ff86f98e420099f (diff) | |
| download | linux-76bc8e2843b66f8205026365966b49ec6da39ae7.tar.gz linux-76bc8e2843b66f8205026365966b49ec6da39ae7.tar.bz2 linux-76bc8e2843b66f8205026365966b49ec6da39ae7.zip | |
ovl: disallow overlayfs as upperdir
This does not work and does not make sense. So instead of fixing it
(probably not hard) just disallow.
Reported-by: Andrei Vagin <avagin@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org>
Diffstat (limited to 'fs/overlayfs')
| -rw-r--r-- | fs/overlayfs/super.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 7fd216a89d9a..f3577395eca5 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -407,7 +407,8 @@ static struct ovl_entry *ovl_alloc_entry(unsigned int numlower) static bool ovl_dentry_remote(struct dentry *dentry) { return dentry->d_flags & - (DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE); + (DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE | + DCACHE_OP_REAL); } static bool ovl_dentry_weird(struct dentry *dentry) |