An inode could be returned by independent parallel lookups, in this
case an update of the lookup counter could be lost resulting in a
memory leak in userspace.
Signed-off-by: Miklos Szeredi <[email protected]>
---
Index: linux/fs/fuse/dir.c
===================================================================
--- linux.orig/fs/fuse/dir.c 2006-10-16 16:06:11.000000000 +0200
+++ linux/fs/fuse/dir.c 2006-10-16 16:08:00.000000000 +0200
@@ -163,7 +163,9 @@ static int fuse_dentry_revalidate(struct
fuse_send_forget(fc, req, outarg.nodeid, 1);
return 0;
}
+ spin_lock(&fc->lock);
fi->nlookup ++;
+ spin_unlock(&fc->lock);
}
fuse_put_request(fc, req);
if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT)
Index: linux/fs/fuse/inode.c
===================================================================
--- linux.orig/fs/fuse/inode.c 2006-10-16 15:57:12.000000000 +0200
+++ linux/fs/fuse/inode.c 2006-10-16 16:08:00.000000000 +0200
@@ -195,7 +195,9 @@ struct inode *fuse_iget(struct super_blo
}
fi = get_fuse_inode(inode);
+ spin_lock(&fc->lock);
fi->nlookup ++;
+ spin_unlock(&fc->lock);
fuse_change_attributes(inode, attr);
return inode;
}
--
-
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