6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Hobin Woo <hobin.woo@xxxxxxxxxxx> commit ca4974ca954561e79f8871d220bb08f14f64f57c upstream. Some file systems may not provide dot (.) and dot-dot (..) as they are optional in POSIX. ksmbd can misjudge emptiness of a directory in those file systems, since it assumes there are always at least two entries: dot and dot-dot. Just don't count dot and dot-dot. Cc: stable@xxxxxxxxxxxxxxx # v6.1+ Signed-off-by: Hobin Woo <hobin.woo@xxxxxxxxxxx> Acked-by: Namjae Jeon <linkinjeon@xxxxxxxxxx> Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/smb/server/vfs.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) --- a/fs/smb/server/vfs.c +++ b/fs/smb/server/vfs.c @@ -1102,9 +1102,10 @@ static bool __dir_empty(struct dir_conte struct ksmbd_readdir_data *buf; buf = container_of(ctx, struct ksmbd_readdir_data, ctx); - buf->dirent_count++; + if (!is_dot_dotdot(name, namlen)) + buf->dirent_count++; - return buf->dirent_count <= 2; + return !buf->dirent_count; } /** @@ -1124,7 +1125,7 @@ int ksmbd_vfs_empty_dir(struct ksmbd_fil readdir_data.dirent_count = 0; err = iterate_dir(fp->filp, &readdir_data.ctx); - if (readdir_data.dirent_count > 2) + if (readdir_data.dirent_count) err = -ENOTEMPTY; else err = 0;
