From 1f1735cb75ab31ed948a7fce65beaaa6c0ed4ed4 Mon Sep 17 00:00:00 2001 From: Goldwyn Rodrigues Date: Mon, 18 Apr 2016 06:41:52 -0500 Subject: cifs: Use file_dentry() CIFS 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. Signed-off-by: Goldwyn Rodrigues Acked-by: Shirish Pargaonkar Signed-off-by: Steve French --- fs/cifs/readdir.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/cifs/readdir.c') diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index 867439c21001..65cf85dcda09 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -303,7 +303,7 @@ initiate_cifs_search(const unsigned int xid, struct file *file) cifsFile->invalidHandle = true; cifsFile->srch_inf.endOfSearch = false; - full_path = build_path_from_dentry(file->f_path.dentry); + full_path = build_path_from_dentry(file_dentry(file)); if (full_path == NULL) { rc = -ENOMEM; goto error_exit; @@ -762,7 +762,7 @@ static int cifs_filldir(char *find_entry, struct file *file, */ fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; - cifs_prime_dcache(file->f_path.dentry, &name, &fattr); + cifs_prime_dcache(file_dentry(file), &name, &fattr); ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); return !dir_emit(ctx, name.name, name.len, ino, fattr.cf_dtype); -- cgit v1.2.3