Re: [PATCH -rt] race condition in fs/compat.c with compat_sys_ioctl

From: Andi Kleen
Date: Wed Nov 16 2005 - 00:55:15 EST

Steven Rostedt <rostedt@xxxxxxxxxxx> writes:
> That's the problem. I found out that one ioctl might sleep holding the
> sem and won't be woken up until another process calls another ioctl to
> wake it up. But unfortunately, the one waking up the sleeper will block
> on the sem. (the killer was tty_wait_until_sent)

You should have looked into mainline first. The semaphore is already gone
because it wasn't even needed anymore.

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