Randy Dunlap 21917fcb05 serial: uartlite: fix exit path null pointer ... commit a553add084 upstream. Call uart_unregister_driver() conditionally instead of unconditionally, only if it has been previously registered. This uses driver.state, just as the sh-sci.c driver does. Fixes this null pointer dereference in tty_unregister_driver(), since the 'driver' argument is null: general protection fault: 0000 [#1] PREEMPT SMP KASAN PTI RIP: 0010:tty_unregister_driver+0x25/0x1d0 Fixes: 238b8721a5 ("[PATCH] serial uartlite driver") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: stable <stable@vger.kernel.org> Cc: Peter Korsgaard <jacmet@sunsite.dk> Link: https://lore.kernel.org/r/9c8e6581-6fcc-a595-0897-4d90f5d710df@infradead.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-10-17 13:45:00 -07:00
..
hvc	tty: Don't force RISCV SBI console as preferred console	2019-05-22 07:37:43 +02:00
ipwireless	tty: ipwireless: fix missing checks for ioremap	2019-05-31 06:46:30 -07:00
serdev
serial	serial: uartlite: fix exit path null pointer	2019-10-17 13:45:00 -07:00
vt	vt/fbcon: deinitialize resources in visual_init() after failed memory allocation	2019-06-09 09:17:21 +02:00
amiserial.c
cyclades.c
ehv_bytechan.c
goldfish.c
isicom.c
Kconfig	tty: ldisc: add sysctl to prevent autoloading of ldiscs	2019-04-17 08:38:47 +02:00
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
nozomi.c
pty.c
rocket.c	tty: rocket: fix incorrect forward declaration of 'rp_init()'	2019-07-10 09:53:44 +02:00
rocket.h
rocket_int.h
synclink.c
synclink_gt.c
synclinkmp.c
sysrq.c
tty_audit.c
tty_baudrate.c
tty_buffer.c	tty: increase the default flip buffer limit to 2*640K	2019-04-05 22:33:13 +02:00
tty_io.c	tty: ldisc: add sysctl to prevent autoloading of ldiscs	2019-04-17 08:38:47 +02:00
tty_ioctl.c
tty_jobctrl.c
tty_ldisc.c	tty: ldisc: add sysctl to prevent autoloading of ldiscs	2019-04-17 08:38:47 +02:00
tty_ldsem.c	tty/ldsem, locking/rwsem: Add missing ACQUIRE to read_failed sleep loop	2019-08-16 10:12:50 +02:00
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