Eric Paris 808ffa3d30 tty_open can return to userspace holding tty_mutex ...

__tty_open could return (to userspace) holding the tty_mutex thanks to a
regression introduced by 4a2b5fddd5 ("Move
tty lookup/reopen to caller").

This was found by bisecting an fsfuzzer problem.  Admittedly I have no
idea how it managed to tickle this 100% reliably, but it is clearly a
regression and when hit leaves the box in a completely unusable state.
This patch lets the fsfuzzer test complete every time.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2009-01-27 07:37:15 -08:00

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