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Commit ee4e5271 authored by Miklos Szeredi's avatar Miklos Szeredi Committed by Linus Torvalds
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[PATCH] fuse: check reserved node ID values 



This patch checks reserved node ID values returned by lookup and creation
operations.  In case one of the reserved values is sent, return -EIO.

Signed-off-by: default avatarMiklos Szeredi <miklos@szeredi.hu>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 909021ea

fs/fuse/dir.c

+6 −0
Original line number Diff line number Diff line
@@ -96,6 +96,8 @@ static int fuse_lookup_iget(struct inode *dir, struct dentry *entry, 
	fuse_lookup_init(req, dir, entry, &outarg);

	request_send(fc, req);

	err = req->out.h.error;

	if (!err && (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID))

		err = -EIO;

	if (!err) {

		inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,

				  &outarg.attr);
@@ -152,6 +154,10 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req, 
		fuse_put_request(fc, req);

		return err;

	}

	if (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID) {

		fuse_put_request(fc, req);

		return -EIO;

	}

	inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,

			  &outarg.attr);

	if (!inode) {