[patch 1/2] audit: let userspace fully control TTY input auditing

Remove the code that automatically disables TTY input auditing in processes
that open TTYs when they have no other TTY open; this heuristic was
intended to automatically handle daemons, but it has false positives (e.g.
with sshd) that make it impossible to control TTY input auditing from a PAM
module.  With this patch, TTY input auditing is controlled from user-space
only.

On the other hand, not even for daemons does it make sense to audit "input"
from PTY masters; this data was produced by a program writing to the PTY
slave, and does not represent data entered by the user.

Signed-off-by: Miloslav Trmac <mitr@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 0 insertions, 5 deletions

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 430624504ca0..265831ccaa88 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -300,7 +300,6 @@ extern void tty_hangup(struct tty_struct * tty);
 extern void tty_vhangup(struct tty_struct * tty);
 extern void tty_unhangup(struct file *filp);
 extern int tty_hung_up_p(struct file * filp);
-extern int is_tty(struct file *filp);
 extern void do_SAK(struct tty_struct *tty);
 extern void __do_SAK(struct tty_struct *tty);
 extern void disassociate_ctty(int priv);
@@ -352,7 +351,6 @@ extern void tty_audit_exit(void);
 extern void tty_audit_fork(struct signal_struct *sig);
 extern void tty_audit_push(struct tty_struct *tty);
 extern void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid, u32 sessionid);
-extern void tty_audit_opening(void);
 #else
 static inline void tty_audit_add_data(struct tty_struct *tty,
                                       unsigned char *data, size_t size)
@@ -370,9 +368,6 @@ static inline void tty_audit_push(struct tty_struct *tty)
 static inline void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid, u32 sessionid)
 {
 }
-static inline void tty_audit_opening(void)
-{
-}
 #endif
 
 /* tty_ioctl.c */