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authorMiklos Szeredi <miklos@szeredi.hu>2005-11-28 13:44:16 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-28 14:42:26 -0800
commit2827d0b23b7279d0a717eea4029efeef2e1b0183 (patch)
tree3d4be5d41404eec385027f434a83abad7f28111d
parentf007d5c961448170d0ec2998b1a80eef054b6235 (diff)
downloadlinux-2827d0b23b7279d0a717eea4029efeef2e1b0183.tar.gz
linux-2827d0b23b7279d0a717eea4029efeef2e1b0183.tar.xz
[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: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/fuse/dir.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 3a47247..51f5da6 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -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;
}