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Re: [PATCH] LSM: Add security_socket_post_accept() and security_socket_post_recv_datagram().

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From: Tetsuo Handa
Subject: Re: [PATCH] LSM: Add security_socket_post_accept() and security_socket_post_recv_datagram().
Date: Thursday, April 23, 2009 - 7:07 pm

David Miller wrote:

I found that "man 2 select" says

  Under Linux, select() may report a socket file descriptor as "ready for
  reading", while nevertheless a subsequent read blocks. This could for example
  happen when data has arrived but upon examination has wrong checksum and is
  discarded. There may be other circumstances in which a file descriptor is
  spuriously reported as ready. Thus it may be safer to use O_NONBLOCK on
  sockets that should not block.

  Linux 2.6.16                   2006-03-11                      SELECT(2)

People cannot use "poll()" to avoid blocking.
Applications had better not to completely depend on what poll() says.

You don't like TOMOYO's concept. I see.
But I don't see the reason you can't accept this proposal.
What does this proposal break? Please explain me.
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Messages in current thread:
[PATCH] LSM: Add security_socket_post_accept() and securit ..., Tetsuo Handa, (Tue Apr 14, 3:44 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Paul Moore, (Tue Apr 14, 3:59 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Tue Apr 14, 10:12 pm)
[PATCH 1/2] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Wed Apr 15, 3:51 am)
[PATCH 2/2] tomoyo: Add network access control support., Tetsuo Handa, (Wed Apr 15, 3:51 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Paul Moore, (Thu Apr 16, 11:23 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Sat Apr 18, 1:34 am)
[PATCH v2] LSM: Add security_socket_post_accept() and secu ..., Tetsuo Handa, (Sun Apr 19, 1:03 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Paul Moore, (Mon Apr 20, 3:22 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Tue Apr 21, 3:54 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Tue Apr 21, 3:57 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Tue Apr 21, 4:39 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Tue Apr 21, 4:40 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Tue Apr 21, 5:26 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Tue Apr 21, 5:37 am)
Re: [PATCH] LSM: Add security_socket_post_accept() andsecu ..., Tetsuo Handa, (Tue Apr 21, 5:52 am)
Re: [PATCH] LSM: Add security_socket_post_accept() andsecu ..., David Miller, (Tue Apr 21, 6:04 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Tue Apr 21, 5:55 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Tue Apr 21, 6:14 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Tue Apr 21, 6:49 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Greg Lindahl, (Tue Apr 21, 6:52 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Tue Apr 21, 9:22 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Tue Apr 21, 9:23 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Tue Apr 21, 10:02 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Tue Apr 21, 10:07 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Tue Apr 21, 10:38 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Tue Apr 21, 10:52 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Greg Lindahl, (Tue Apr 21, 11:10 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Tue Apr 21, 11:34 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Greg Lindahl, (Tue Apr 21, 11:41 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Tue Apr 21, 11:46 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Greg Lindahl, (Tue Apr 21, 11:54 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Tue Apr 21, 11:58 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Wed Apr 22, 12:19 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Thu Apr 23, 7:00 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Thu Apr 23, 7:10 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Samir Bellabes, (Thu Apr 23, 7:47 am)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Thu Apr 23, 7:07 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Thu Apr 23, 9:35 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., David Miller, (Thu Apr 23, 9:41 pm)
Re: [PATCH] LSM: Add security_socket_post_accept() and sec ..., Tetsuo Handa, (Thu Apr 23, 9:55 pm)