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| author | Amir Goldstein <amir73il@gmail.com> | 2019-12-06 09:33:36 +0300 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2019-12-10 18:00:55 +0300 |
| commit | 6889ee5a53b8d969aa542047f5ac8acdc0e79a91 (patch) | |
| tree | 73f32667320449fcc809d211f5d44714de8a9b05 /fs/overlayfs/overlayfs.h | |
| parent | 9c6d8f13e9da10a26ad7f0a020ef86e8ef142835 (diff) | |
| download | linux-6889ee5a53b8d969aa542047f5ac8acdc0e79a91.tar.xz | |
ovl: relax WARN_ON() on rename to self
In ovl_rename(), if new upper is hardlinked to old upper underneath
overlayfs before upper dirs are locked, user will get an ESTALE error
and a WARN_ON will be printed.
Changes to underlying layers while overlayfs is mounted may result in
unexpected behavior, but it shouldn't crash the kernel and it shouldn't
trigger WARN_ON() either, so relax this WARN_ON().
Reported-by: syzbot+bb1836a212e69f8e201a@syzkaller.appspotmail.com
Fixes: 804032fabb3b ("ovl: don't check rename to self")
Cc: <stable@vger.kernel.org> # v4.9+
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/overlayfs.h')
0 files changed, 0 insertions, 0 deletions