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tty: audit: Check audit enable first

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Audit is unlikely to be enabled; check first to exit asap.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2016-01-09 22:55:37 -08:00 committed by Greg Kroah-Hartman
parent fbaa122718
commit f17c366274
1 changed files with 4 additions and 3 deletions
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7
drivers/tty/tty_audit.c
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@ -211,6 +211,10 @@ void tty_audit_add_data(struct tty_struct *tty, const void *data, size_t size)
unsigned int audit_tty;
dev_t dev;
audit_tty = READ_ONCE(current->signal->audit_tty);
if (~audit_tty & AUDIT_TTY_ENABLE)
return;
if (unlikely(size == 0))
return;
@ -218,9 +222,6 @@ void tty_audit_add_data(struct tty_struct *tty, const void *data, size_t size)
&& tty->driver->subtype == PTY_TYPE_MASTER)
return;
audit_tty = READ_ONCE(current->signal->audit_tty);
if (~audit_tty & AUDIT_TTY_ENABLE)
return;
if ((~audit_tty & AUDIT_TTY_LOG_PASSWD) && icanon && !L_ECHO(tty))
return;