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| author | Amir Goldstein <amir73il@gmail.com> | 2017-09-18 21:53:43 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2017-10-05 15:53:18 +0200 |
| commit | 954c736f865d6c0c68ae4263a2f3502ee7c447a3 (patch) | |
| tree | b49f8a37ae725797c9eac78c62e1434b2ca2dfed /fs/namespace.c | |
| parent | Linux 4.14-rc3 (diff) | |
| download | linux-954c736f865d6c0c68ae4263a2f3502ee7c447a3.tar.xz linux-954c736f865d6c0c68ae4263a2f3502ee7c447a3.zip | |
ovl: fix may_write_real() for overlayfs directories
Overlayfs directory file_inode() is the overlay inode whether the real
inode is upper or lower.
This fixes a regression in xfstest generic/158.
Fixes: 7c6893e3c9ab ("ovl: don't allow writing ioctl on lower layer")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/namespace.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 54059b142d6b..3b601f115b6c 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -468,7 +468,9 @@ static inline int may_write_real(struct file *file) /* File refers to upper, writable layer? */ upperdentry = d_real(dentry, NULL, 0, D_REAL_UPPER); - if (upperdentry && file_inode(file) == d_inode(upperdentry)) + if (upperdentry && + (file_inode(file) == d_inode(upperdentry) || + file_inode(file) == d_inode(dentry))) return 0; /* Lower layer: can't write to real file, sorry... */ |