Commit 2827d0b2 authored by Miklos Szeredi's avatar Miklos Szeredi Committed by Linus Torvalds
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[PATCH] fuse: check for invalid node ID in fuse_create_open() 



Check for invalid node ID values in the new atomic create+open method.

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 f007d5c9

fs/fuse/dir.c

+8 −3
Original line number Diff line number Diff line
@@ -87,6 +87,11 @@ static int dir_alias(struct inode *inode) 
	return 0;

}



static inline int invalid_nodeid(u64 nodeid)

{

	return !nodeid || nodeid == FUSE_ROOT_ID;

}



static struct dentry_operations fuse_dentry_operations = {

	.d_revalidate	= fuse_dentry_revalidate,

};
@@ -110,7 +115,7 @@ 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))

	if (!err && invalid_nodeid(outarg.nodeid))

		err = -EIO;

	if (!err) {

		inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
@@ -206,7 +211,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode, 
	}



	err = -EIO;

	if (!S_ISREG(outentry.attr.mode))

	if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid))

		goto out_free_ff;



	inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation,
@@ -263,7 +268,7 @@ 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) {

	if (invalid_nodeid(outarg.nodeid)) {

		fuse_put_request(fc, req);

		return -EIO;

	}