He Zhe 498ce67eb6 serial: 8250: Fix serial8250 initialization crash ... [ Upstream commit 352c4cf40c ] The initialization code of interrupt backoff work might reference NULL pointer and cause the following crash, if no port was found. [ 10.017727] CPU 0 Unable to handle kernel paging request at virtual address 000001b0, epc == 807088e0, ra == 8070863c ---- snip ---- [ 11.704470] [<807088e0>] serial8250_register_8250_port+0x318/0x4ac [ 11.747251] [<80708d74>] serial8250_probe+0x148/0x1c0 [ 11.789301] [<80728450>] platform_drv_probe+0x40/0x94 [ 11.830515] [<807264f8>] really_probe+0xf8/0x318 [ 11.870876] [<80726b7c>] __driver_attach+0x110/0x12c [ 11.910960] [<80724374>] bus_for_each_dev+0x78/0xcc [ 11.951134] [<80725958>] bus_add_driver+0x200/0x234 [ 11.989756] [<807273d8>] driver_register+0x84/0x148 [ 12.029832] [<80d72f84>] serial8250_init+0x138/0x198 [ 12.070447] [<80100e6c>] do_one_initcall+0x5c/0x2a0 [ 12.110104] [<80d3a208>] kernel_init_freeable+0x370/0x484 [ 12.150722] [<80a49420>] kernel_init+0x10/0xf8 [ 12.191517] [<8010756c>] ret_from_kernel_thread+0x14/0x1c This patch makes sure the initialization code can be reached only if a port is found. Fixes: 6d7f677a2a ("serial: 8250: Rate limit serial port rx interrupts during input overruns") Signed-off-by: He Zhe <zhe.he@windriver.com> Reviewed-by: Darwin Dingel <darwin.dingel@alliedtelesis.co.nz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-12-05 09:21:06 +01:00
..
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: 8250: Fix serial8250 initialization crash	2019-12-05 09:21:06 +01:00
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 build on SPARC	2019-11-06 13:05:49 +01:00
n_null.c
n_r3964.c
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c
nozomi.c
pty.c	pty: fix compat ioctls	2019-12-01 09:16:16 +01:00
rocket_int.h
rocket.c	tty: rocket: fix incorrect forward declaration of 'rp_init()'	2019-07-10 09:53:44 +02:00
rocket.h
synclink_gt.c	synclink_gt(): fix compat_ioctl()	2019-12-01 09:16:16 +01:00
synclink.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
vcc.c