Peter Hurley fbaa122718
tty: audit: Simplify first-use allocation ...
The first-use tty audit buffer allocation is a potential race
amongst multiple attempts at 'first-use'; only one 'winner' is
acceptable.
The successful buffer assignment occurs if tty_audit_buf == NULL
(which will also be the return from cmpxchg()); otherwise, another
racer 'won' and this buffer allocation is freed.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com >
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
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fbaa122718