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| author |   Miklos Szeredi <miklos@szeredi.hu> | 2015-10-12 15:56:20 +0200 |
|---|---|---|
| committer | Miklos Szeredi <miklos@szeredi.hu> | 2015-10-12 15:56:20 +0200 |
| commit | 1c8a47df36d72ace8cf78eb6c228aa0f8027d3c2 (patch) | |
| tree | f81ba92bcb7d112277c54c7cba46e82d24b95716 /fs/overlayfs/inode.c | |
| parent | ovl: fix dentry reference leak (diff) | |
| download | linux-dev-1c8a47df36d72ace8cf78eb6c228aa0f8027d3c2.tar.xz linux-dev-1c8a47df36d72ace8cf78eb6c228aa0f8027d3c2.zip | |
ovl: fix open in stacked overlay
If two overlayfs filesystems are stacked on top of each other, then we need
recursion in ovl_d_select_inode().
I guess d_backing_inode() is supposed to do that. But currently it doesn't
and that functionality is open coded in vfs_open(). This is now copied
into ovl_d_select_inode() to fix this regression.
Reported-by: Alban Crequy <alban.crequy@gmail.com>
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Fixes: 4bacc9c9234c ("overlayfs: Make f_path always point to the overlay...")
Cc: David Howells <dhowells@redhat.com>
Cc: <stable@vger.kernel.org> # v4.2+
Diffstat (limited to 'fs/overlayfs/inode.c')
| -rw-r--r-- | fs/overlayfs/inode.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index d9da5a4e9382..ec0c2a050043 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -363,6 +363,9 @@ struct inode *ovl_d_select_inode(struct dentry *dentry, unsigned file_flags) ovl_path_upper(dentry, &realpath); } + if (realpath.dentry->d_flags & DCACHE_OP_SELECT_INODE) + return realpath.dentry->d_op->d_select_inode(realpath.dentry, file_flags); + return d_backing_inode(realpath.dentry); } |