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(parent: b7861b3) | patch
tty: Fix tty_send_xchar() lock order inversion
authorPeter Hurley <peter@hurleysoftware.com>
Wed, 11 Nov 2015 13:03:54 +0000 (08:03 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 9 Dec 2015 19:31:25 +0000 (14:31 -0500)
commit0163804569a78f87cf47cf5a0891c7e829bd101c
treeb88364bb8b77a8aeea10187f57bd24f3db047978tree | snapshot
parentb7861b3137c40241cc299345a47be7f7d1efae10commit | diff
tty: Fix tty_send_xchar() lock order inversion

commit ee0c1a65cf95230d5eb3d9de94fd2ead9a428c67 upstream.

The correct lock order is atomic_write_lock => termios_rwsem, as
established by tty_write() => n_tty_write().

Fixes: c274f6ef1c666 ("tty: Hold termios_rwsem for tcflow(TCIxxx)")
Reported-and-Tested-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/tty_io.c diff | blob | history
drivers/tty/tty_ioctl.c diff | blob | history
wrapfs-4.2.y