Re: BUG? "Call fasync() functions without the BKL" is racy

From: Andi Kleen
Date: Wed Dec 03 2008 - 16:20:58 EST

I wonder if we need FASYNC at all. This could be gotten implicitely by
looking at the fasync_list

Only if socket.

But the helpers used by the character drivers add it too I think.

Serioulsy, I think the best (partial, yes) fix for now is to restore
lock_kernel() in setfl() and change ioctl_fioxxx() accordingly.
At least this protect us from tty too.

For 2.6.28 I agree.

Not that I think this is very good idea though ;)

The lock bit sounds reasonable.


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