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author | Miklos Szeredi <mszeredi@suse.cz> | 2015-05-14 10:04:44 +0200 |
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committer | Miklos Szeredi <mszeredi@suse.cz> | 2015-05-14 10:04:44 +0200 |
commit | d377c5eb54dd05aeb3094b7740252d19ba7791f7 (patch) | |
tree | e0af790ebf150f97fbb1ea79bdb0d5aa6f2a3474 /fs/overlayfs/copy_up.c | |
parent | 030bbdbf4c833bc69f502eae58498bc5572db736 (diff) | |
download | linux-d377c5eb54dd05aeb3094b7740252d19ba7791f7.tar.bz2 |
ovl: don't remove non-empty opaque directory
When removing an opaque directory we can't just call rmdir() to check for
emptiness, because the directory will need to be replaced with a whiteout.
The replacement is done with RENAME_EXCHANGE, which doesn't check
emptiness.
Solution is just to check emptiness by reading the directory. In the
future we could add a new rename flag to check for emptiness even for
RENAME_EXCHANGE to optimize this case.
Reported-by: Vincent Batts <vbatts@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Tested-by: Jordi Pujol Palomer <jordipujolp@gmail.com>
Fixes: 263b4a0fee43 ("ovl: dont replace opaque dir")
Cc: <stable@vger.kernel.org> # v4.0+
Diffstat (limited to 'fs/overlayfs/copy_up.c')
0 files changed, 0 insertions, 0 deletions