linux/drivers/tty
Tetsuo Handa bcdd0ca8cb tty: Use __GFP_NOFAIL for tty_ldisc_get()
syzbot is reporting crashes triggered by memory allocation fault injection
at tty_ldisc_get() [1]. As an attempt to handle OOM in a graceful way, we
have tried commit 5362544beb ("tty: don't panic on OOM in
tty_set_ldisc()"). But we reverted that attempt by commit a8983d01f9
("Revert "tty: don't panic on OOM in tty_set_ldisc()"") due to reproducible
crash. We should spend resource for finding and fixing race condition bugs
rather than complicate error paths for 2 * sizeof(void *) bytes allocation
failure.

[1] https://syzkaller.appspot.com/bug?id=489d33fa386453859ead58ff5171d43772b13aa3

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+40b7287c2dc987c48c81@syzkaller.appspotmail.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-25 15:03:44 +02:00
..
hvc TTY/Serial driver patches for 4.17-rc1 2018-04-04 18:43:49 -07:00
ipwireless
serdev serdev: Fix typo in serdev_device_alloc 2018-03-14 15:02:45 +01:00
serial tty: serial: xuartps: Setup early console when uartclk is also passed 2018-04-23 11:12:22 +02:00
vt TTY/Serial driver patches for 4.17-rc1 2018-04-04 18:43:49 -07:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2018-04-09 09:04:10 -07:00
Makefile tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers 2018-03-26 15:57:24 +02:00
amiserial.c
cyclades.c
ehv_bytechan.c
goldfish.c
isicom.c
mips_ejtag_fdc.c
moxa.c
moxa.h
mxser.c
mxser.h
n_gsm.c tty: n_gsm: Fix DLCI handling for ADM mode if debug & 2 is not set 2018-04-22 17:34:40 +02:00
n_hdlc.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
n_null.c
n_r3964.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c tty: make n_tty_read() always abort if hangup is in progress 2018-02-28 13:21:10 +01:00
nozomi.c
pty.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
rocket.c
rocket.h
rocket_int.h
synclink.c
synclink_gt.c
synclinkmp.c
sysrq.c fs: add ksys_sync() helper; remove in-kernel calls to sys_sync() 2018-04-02 20:16:05 +02:00
tty_audit.c
tty_baudrate.c
tty_buffer.c
tty_io.c tty: Don't call panic() at tty_ldisc_init() 2018-04-23 11:05:52 +02:00
tty_ioctl.c
tty_jobctrl.c
tty_ldisc.c tty: Use __GFP_NOFAIL for tty_ldisc_get() 2018-04-25 15:03:44 +02:00
tty_ldsem.c
tty_mutex.c
tty_port.c
vcc.c