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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-10-06 17:52:53 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-10-06 17:52:53 +0200 |
| commit | 8d4ef4e15ec57eec5d24fb109fbc220eea9f0caf (patch) | |
| tree | a3e047f8f3670b06a367a211d1bb5f1785302736 /Documentation | |
| parent | Merge tag 'powerpc-4.14-4' of git://git.kernel.org/pub/scm/linux/kernel/git/p... (diff) | |
| parent | ovl: fix regression caused by exclusive upper/work dir protection (diff) | |
| download | linux-8d4ef4e15ec57eec5d24fb109fbc220eea9f0caf.tar.xz linux-8d4ef4e15ec57eec5d24fb109fbc220eea9f0caf.zip | |
Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
Pull overlayfs fixes from Miklos Szeredi:
"Fix a regression in 4.14 and one in 4.13. The latter is a case when
Docker is doing something it really shouldn't and gets away with it.
We now print a warning instead of erroring out.
There are also fixes to several error paths"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: fix regression caused by exclusive upper/work dir protection
ovl: fix missing unlock_rename() in ovl_do_copy_up()
ovl: fix dentry leak in ovl_indexdir_cleanup()
ovl: fix dput() of ERR_PTR in ovl_cleanup_index()
ovl: fix error value printed in ovl_lookup_index()
ovl: fix may_write_real() for overlayfs directories
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/overlayfs.txt | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/filesystems/overlayfs.txt b/Documentation/filesystems/overlayfs.txt index 36f528a7fdd6..8caa60734647 100644 --- a/Documentation/filesystems/overlayfs.txt +++ b/Documentation/filesystems/overlayfs.txt @@ -210,8 +210,11 @@ path as another overlay mount and it may use a lower layer path that is beneath or above the path of another overlay lower layer path. Using an upper layer path and/or a workdir path that are already used by -another overlay mount is not allowed and will fail with EBUSY. Using +another overlay mount is not allowed and may fail with EBUSY. Using partially overlapping paths is not allowed but will not fail with EBUSY. +If files are accessed from two overlayfs mounts which share or overlap the +upper layer and/or workdir path the behavior of the overlay is undefined, +though it will not result in a crash or deadlock. Mounting an overlay using an upper layer path, where the upper layer path was previously used by another mounted overlay in combination with a |