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[PATCH] fuse: check reserved node ID values

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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: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Miklos Szeredi 2005-09-27 21:45:21 -07:00 committed by Linus Torvalds
parent 909021ea7a
commit ee4e52719c
1 changed files with 6 additions and 0 deletions
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6
fs/fuse/dir.c
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@ -96,6 +96,8 @@ static int fuse_lookup_iget(struct inode *dir, struct dentry *entry,
fuse_lookup_init(req, dir, entry, &outarg); fuse_lookup_init(req, dir, entry, &outarg);
request_send(fc, req); request_send(fc, req);
err = req->out.h.error; err = req->out.h.error;
if (!err && (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID))
err = -EIO;
if (!err) { if (!err) {
inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
&outarg.attr); &outarg.attr);
@ -152,6 +154,10 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req,
fuse_put_request(fc, req); fuse_put_request(fc, req);
return err; 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, inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
&outarg.attr); &outarg.attr);
if (!inode) { if (!inode) {