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

Merge tag 'tty-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2018-04-04 18:43:49 -07:00

ipwireless

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

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

Merge tag 'tty-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2018-04-04 18:43:49 -07:00

amiserial.c

tty: add SPDX identifiers to all remaining files in drivers/tty/

2017-11-08 13:08:12 +01:00

cyclades.c

treewide: Switch DEFINE_TIMER callbacks to struct timer_list *

2017-11-21 15:57:05 -08:00

ehv_bytechan.c

tty: ehv_bytechan: fix spelling mistake

2017-11-08 14:27:10 +01:00

goldfish.c

tty: goldfish: Enable 'earlycon' only if built-in

2017-12-15 20:27:44 +01:00

isicom.c

tty/isicom: Fix a possible sleep-in-atomic bug in WaitTillCardIsFree

2017-12-15 20:24:14 +01:00

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

mips_ejtag_fdc.c

tty: Remove redundant license text

2017-11-08 13:08:12 +01:00

moxa.c

tty: moxa: Add support for CMSPAR

2017-11-28 15:32:33 +01:00

moxa.h

tty: moxa: Add support for CMSPAR

2017-11-28 15:32:33 +01:00

mxser.c

tty: Remove redundant license text

2017-11-08 13:08:12 +01:00

mxser.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

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

tty: Remove redundant license text

2017-11-08 13:08:12 +01:00

n_r3964.c

vfs: do bulk POLL* -> EPOLL* replacement

2018-02-11 14:34:03 -08:00

n_tracerouter.c

tty: Remove redundant license text

2017-11-08 13:08:12 +01:00

n_tracesink.c

tty: Remove redundant license text

2017-11-08 13:08:12 +01:00

n_tracesink.h

tty: Remove redundant license text

2017-11-08 13:08:12 +01:00

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

tty: Remove redundant license text

2017-11-08 13:08:12 +01:00

pty.c

vfs: do bulk POLL* -> EPOLL* replacement

2018-02-11 14:34:03 -08:00

rocket_int.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

rocket.c

treewide: Switch DEFINE_TIMER callbacks to struct timer_list *

2017-11-21 15:57:05 -08:00

rocket.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

synclink_gt.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

synclink.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

synclinkmp.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

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: Remove redundant license text

2017-11-08 13:08:12 +01:00

tty_baudrate.c

tty: add SPDX identifiers to all remaining files in drivers/tty/

2017-11-08 13:08:12 +01:00

tty_buffer.c

tty: add SPDX identifiers to all remaining files in drivers/tty/

2017-11-08 13:08:12 +01:00

tty_io.c

tty: Don't call panic() at tty_ldisc_init()

2018-04-23 11:05:52 +02:00

tty_ioctl.c

tty: add SPDX identifiers to all remaining files in drivers/tty/

2017-11-08 13:08:12 +01:00

tty_jobctrl.c

tty: add SPDX identifiers to all remaining files in drivers/tty/

2017-11-08 13:08:12 +01:00

tty_ldisc.c

tty: Use __GFP_NOFAIL for tty_ldisc_get()

2018-04-25 15:03:44 +02:00

tty_ldsem.c

tty: Remove redundant license text

2017-11-08 13:08:12 +01:00

tty_mutex.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

tty_port.c

tty: add SPDX identifiers to all remaining files in drivers/tty/

2017-11-08 13:08:12 +01:00

vcc.c

tty: vcc: Convert timers to use timer_setup()

2017-11-04 12:01:54 +01:00