linux/drivers/tty
Paul Fulghum 71d1a74f36 tty/n_hdlc: fix __might_sleep warning
commit fc01d8c61c upstream.

Fix __might_sleep warning[1] in tty/n_hdlc.c read due to copy_to_user
call while current is TASK_INTERRUPTIBLE.  This is a false positive
since the code path does not depend on current state remaining
TASK_INTERRUPTIBLE.  The loop breaks out and sets TASK_RUNNING after
calling copy_to_user.

This patch supresses the warning by setting TASK_RUNNING before calling
copy_to_user.

[1] https://syzkaller.appspot.com/bug?id=17d5de7f1fcab794cb8c40032f893f52de899324

Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Reported-by: syzbot <syzbot+c244af085a0159d22879@syzkaller.appspotmail.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: stable <stable@vger.kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-31 08:14:36 +01:00
..
hvc tty: hvc: hvc_write() fix break condition 2018-09-10 18:04:31 +02:00
ipwireless
serdev serdev: add dev_pm_domain_attach|detach() 2018-07-15 12:23:53 +02:00
serial uart: Fix crash in uart_write and uart_put_char 2019-01-31 08:14:36 +01:00
vt vt: fix broken display when running aptitude 2018-11-13 11:09:00 -08:00
amiserial.c
cyclades.c
ehv_bytechan.c
goldfish.c
isicom.c
Kconfig
Makefile
mips_ejtag_fdc.c
moxa.c
moxa.h
mxser.c
mxser.h
n_gsm.c
n_hdlc.c tty/n_hdlc: fix __might_sleep warning 2019-01-31 08:14:36 +01:00
n_null.c
n_r3964.c
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c tty: wipe buffer if not echoing data 2018-12-01 09:37:34 +01:00
nozomi.c
pty.c pty: fix O_CLOEXEC for TIOCGPTPEER 2018-07-21 09:08:47 +02:00
rocket_int.h
rocket.c tty: rocket: Fix possible buffer overwrite on register_PCI 2018-08-02 10:11:32 +02:00
rocket.h
synclink_gt.c
synclink.c
synclinkmp.c
sysrq.c signal: Pass pid type into do_send_sig_info 2018-07-21 12:57:35 -05:00
tty_audit.c
tty_baudrate.c termios, tty/tty_baudrate.c: fix buffer overrun 2018-11-21 09:19:20 +01:00
tty_buffer.c tty: wipe buffer. 2018-12-01 09:37:34 +01:00
tty_io.c tty: Handle problem if line discipline does not have receive_buf 2019-01-31 08:14:36 +01:00
tty_ioctl.c
tty_jobctrl.c
tty_ldisc.c
tty_ldsem.c tty/ldsem: Wake up readers after timed out down_write() 2019-01-22 21:40:28 +01:00
tty_mutex.c
tty_port.c tty: do not set TTY_IO_ERROR flag if console port 2018-12-13 09:16:22 +01:00
vcc.c