On 2013/2/19 20:33, Zheng Liu wrote: > On Tue, Feb 19, 2013 at 09:22:40AM +0800, Li Zefan wrote: >> There's a long long-standing bug...As long as I don't know when it dates >> from. >> >> I've written and attached a simple program to reproduce this bug, and it can >> immediately trigger the bug in my box. It uses two threads, one keeps calling >> read(), and the other calling readdir(), both on the same directory fd. > > Hi Zefan, > > Out of curiosity, why do you call read(2) on a directory fd? I only > open(2) a directory in order to execute a flush operation to make sure > that a file is really created. > Because something wrong happened in userspace programs. After a thread closed a socket, another thread is still reading data from this socket, but the socket fd has been re-used for opening directory for readdir()! -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
