diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2016-01-10 09:55:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-28 03:41:04 +0300 |
| commit | 309426ae69cdf35b0d72a8bd59a5081f8ddccddd (patch) | |
| tree | ab1c875ae4e292d7e897d672923c7d5da1ec23aa /drivers/tty/n_tty.c | |
| parent | eab25a5cd1f91b5c7991affe95f24ce188b8021f (diff) | |
| download | linux-309426ae69cdf35b0d72a8bd59a5081f8ddccddd.tar.xz | |
tty: audit: Remove icanon mode from call chain
The tty termios bits cannot change while n_tty_read() is in the
i/o loop; the termios_rwsem ensures mutual exclusion with termios
changes in n_tty_set_termios(). Check L_ICANON() directly and
eliminate icanon parameter.
NB: tty_audit_add_data() => tty_audit_buf_get() => tty_audit_buf_alloc()
is a single path; ie., tty_audit_buf_get() and tty_audit_buf_alloc()
have no other callers.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/n_tty.c')
| -rw-r--r-- | drivers/tty/n_tty.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index bacafda44bf3..4fbc5defbcd8 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -162,7 +162,7 @@ static int tty_copy_to_user(struct tty_struct *tty, void __user *to, int uncopied; if (n > size) { - tty_audit_add_data(tty, from, size, ldata->icanon); + tty_audit_add_data(tty, from, size); uncopied = copy_to_user(to, from, size); if (uncopied) return uncopied; @@ -171,7 +171,7 @@ static int tty_copy_to_user(struct tty_struct *tty, void __user *to, from = ldata->read_buf; } - tty_audit_add_data(tty, from, n, ldata->icanon); + tty_audit_add_data(tty, from, n); return copy_to_user(to, from, n); } @@ -1978,7 +1978,7 @@ static int copy_from_read_buf(struct tty_struct *tty, retval = copy_to_user(*b, from, n); n -= retval; is_eof = n == 1 && *from == EOF_CHAR(tty); - tty_audit_add_data(tty, from, n, ldata->icanon); + tty_audit_add_data(tty, from, n); smp_store_release(&ldata->read_tail, ldata->read_tail + n); /* Turn single EOF into zero-length read */ if (L_EXTPROC(tty) && ldata->icanon && is_eof && |