tty: fix race in tty_fasync

We need to keep the lock held over the call to __f_setown() to
prevent a PID race.

Thanks to Al Viro for pointing out the problem, and to Travis for
making us look here in the first place.

Cc: Eric W. Biederman <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Alan Cox <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Tavis Ormandy <[email protected]>
Cc: Jeff Dike <[email protected]>
Cc: Julien Tinnes <[email protected]>
Cc: Matt Mackall <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

0 files changed, 0 insertions, 0 deletions