Alexey Kardashevskiy cda2f222e7 serial_core: Check for port state when tty is in error state ... commit 2f70e49ed8 upstream. At the moment opening a serial device node (such as /dev/ttyS3) succeeds even if there is no actual serial device behind it. Reading/writing/ioctls fail as expected because the uart port is not initialized (the type is PORT_UNKNOWN) and the TTY_IO_ERROR error state bit is set fot the tty. However setting line discipline does not have these checks 8250_port.c (8250 is the default choice made by univ8250_console_init()). As the result of PORT_UNKNOWN, uart_port::iobase is NULL which a platform translates onto some address accessing which produces a crash like below. This adds tty_port_initialized() to uart_set_ldisc() to prevent the crash. Found by syzkaller. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Link: https://lore.kernel.org/r/20201203055834.45838-1-aik@ozlabs.ru Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-12-30 11:51:00 +01:00
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hvc	tty: hvcs: Don't NULL tty->driver_data until hvcs_cleanup()	2020-10-29 09:57:38 +01:00
ipwireless	tty: ipwireless: fix error handling	2020-10-29 09:58:08 +01:00
serdev	serdev: ttyport: restore client ops on deregistration	2020-02-28 17:22:19 +01:00
serial	serial_core: Check for port state when tty is in error state	2020-12-30 11:51:00 +01:00
vt	vt: Disable KD_FONT_OP_COPY	2020-11-10 12:37:31 +01:00
Kconfig	…
Makefile	…
amiserial.c	…
cyclades.c	…
ehv_bytechan.c	tty: evh_bytechan: Fix out of bounds accesses	2020-04-23 10:36:44 +02:00
goldfish.c	…
isicom.c	…
mips_ejtag_fdc.c	…
moxa.c	…
moxa.h	…
mxser.c	…
mxser.h	…
n_gsm.c	tty: n_gsm: Fix bogus i++ in gsm_data_kick	2020-06-24 17:50:29 +02:00
n_hdlc.c	…
n_null.c	…
n_r3964.c	…
n_tracerouter.c	…
n_tracesink.c	…
n_tracesink.h	…
n_tty.c	…
nozomi.c	…
pty.c	pty: do tty_flip_buffer_push without port->lock in pty_write	2020-10-29 09:57:38 +01:00
rocket.c	tty: rocket, avoid OOB access	2020-04-29 16:33:17 +02:00
rocket.h	…
rocket_int.h	…
synclink.c	…
synclink_gt.c	tty: synclink_gt: Adjust indentation in several functions	2020-02-24 08:36:47 +01:00
synclinkmp.c	tty: synclinkmp: Adjust indentation in several functions	2020-02-24 08:36:47 +01:00
sysrq.c	…
tty_audit.c	…
tty_baudrate.c	…
tty_buffer.c	…
tty_io.c	tty: Fix ->session locking	2020-12-11 13:23:28 +01:00
tty_ioctl.c	…
tty_jobctrl.c	tty: Fix ->session locking	2020-12-11 13:23:28 +01:00
tty_ldisc.c	…
tty_ldsem.c	…
tty_mutex.c	…
tty_port.c	serdev: ttyport: restore client ops on deregistration	2020-02-28 17:22:19 +01:00
ttynull.c	…
vcc.c	sparc64: vcc: Fix error return code in vcc_probe()	2020-10-01 13:17:57 +02:00