diff options
| author | Miklos Szeredi <mszeredi@redhat.com> | 2016-03-26 16:14:39 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-20 15:42:13 +0900 |
| commit | fda9797a6aaad1a8044614fbbdb265dda4328c41 (patch) | |
| tree | 3698233e1dfcebdd2457d9f1e902ac0776c4c979 /fs/nfs/inode.c | |
| parent | c452dfc33274832a0f23b80ff2829b6fae9dd95d (diff) | |
nfs: use file_dentry()
commit be62a1a8fd116f5cd9e53726601f970e16e17558 upstream.
NFS may be used as lower layer of overlayfs and accessing f_path.dentry can
lead to a crash.
Fix by replacing direct access of file->f_path.dentry with the
file_dentry() accessor, which will always return a native object.
Fixes: 4bacc9c9234c ("overlayfs: Make f_path always point to the overlay and f_inode to the underlay")
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Tested-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Acked-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/nfs/inode.c')
| -rw-r--r-- | fs/nfs/inode.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 3e2071a177fd..f714b98cfd74 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -927,7 +927,7 @@ int nfs_open(struct inode *inode, struct file *filp) { struct nfs_open_context *ctx; - ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); + ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode); if (IS_ERR(ctx)) return PTR_ERR(ctx); nfs_file_set_open_context(filp, ctx); |