Andy Shevchenko 7c3e8d9df2 serial: 8250_exar: Avoid NULL pointer dereference at ->exit() ...

It's possible that during ->exit() the private_data is NULL,
for instance when there was no GPIO device instantiated.
Due to this we may not dereference it. Add a respective check.

Note, for now ->exit() only makes sense when GPIO device
was instantiated, that's why we may use the check for entire
function.

Fixes: 81171e7d31 ("serial: 8250_exar: Constify the software nodes")
Reported-by: Maxim Levitsky <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
Tested-by: Maxim Levitsky <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

2021-06-09 14:40:48 +02:00

..

hvc

tty: hvc: make symbol 'hvc_udbg_dev' static

2021-04-10 10:41:40 +02:00

ipwireless

tty: make everyone's write_room return >= 0

2021-03-10 09:34:09 +01:00

serdev

tty: serdev: core: Provide missing description for 'owner'

2020-11-06 10:49:27 +01:00

serial

serial: 8250_exar: Avoid NULL pointer dereference at ->exit()

2021-06-09 14:40:48 +02:00

vt

tty: vt: always invoke vc->vc_sw->con_resize callback

2021-05-15 08:12:12 -07:00

amiserial.c

tty: amiserial: add missing TIOCSSERIAL jiffies conversions

2021-04-07 17:22:07 +02:00

ehv_bytechan.c

…

goldfish.c

tty: goldfish: use __raw_writel()/__raw_readl()

2020-10-28 13:44:43 +01:00

Kconfig

tty: pti: Remove Kconfig leftovers

2021-04-09 17:00:32 +02:00

Makefile

tty: rocket, remove the driver

2021-03-10 09:34:06 +01:00

mips_ejtag_fdc.c

treewide: Use fallthrough pseudo-keyword

2020-08-23 17:36:59 -05:00

moxa.c

tty: moxa: fix TIOCSSERIAL implementation

2021-04-07 17:22:07 +02:00

moxa.h

…

mxser.c

tty: mxser: drop low-latency workaround

2021-04-22 12:09:24 +02:00

mxser.h

…

n_gsm.c

tty: clean include/linux/tty.h up

2021-04-15 10:32:17 +02:00

n_hdlc.c

tty: clean include/linux/tty.h up

2021-04-15 10:32:17 +02:00

n_null.c

tty: remove TTY_LDISC_MAGIC

2021-03-10 09:34:06 +01:00

n_r3964.c

tty: remove TTY_LDISC_MAGIC

2021-03-10 09:34:06 +01:00

n_tty.c

tty: create internal tty.h file

2021-04-15 10:22:17 +02:00

nozomi.c

tty: nozomi, remove useless debug prints

2021-03-10 09:34:08 +01:00

pty.c

tty: create internal tty.h file

2021-04-15 10:22:17 +02:00

synclink_gt.c

tty: synclink_gt: remove redundant initialization of variable count

2021-04-22 12:01:59 +02:00

sysrq.c

tty/sysrq: Fix issues of code indent should use tabs

2021-04-10 10:33:00 +02:00

tty_audit.c

tty: audit: move some local functions out of tty.h

2021-04-15 10:24:58 +02:00

tty_baudrate.c

tty: clean include/linux/tty.h up

2021-04-15 10:32:17 +02:00

tty_buffer.c

tty: move some internal tty lock enums and functions out of tty.h

2021-04-15 10:26:58 +02:00

tty_io.c

tty: make tty_release_redirect() static

2021-04-15 10:28:30 +02:00

tty_ioctl.c

tty: move some tty-only functions to drivers/tty/tty.h

2021-04-15 10:30:18 +02:00

tty_jobctrl.c

tty: create internal tty.h file

2021-04-15 10:22:17 +02:00

tty_ldisc.c

tty: create internal tty.h file

2021-04-15 10:22:17 +02:00

tty_ldsem.c

…

tty_mutex.c

tty: move some internal tty lock enums and functions out of tty.h

2021-04-15 10:26:58 +02:00

tty_port.c

tty: create internal tty.h file

2021-04-15 10:22:17 +02:00

tty.h

tty: clean include/linux/tty.h up

2021-04-15 10:32:17 +02:00

ttynull.c

Revert "init/console: Use ttynull as a fallback when there is no console"

2021-01-08 11:02:18 -08:00

vcc.c

tty: make everyone's write_room return >= 0

2021-03-10 09:34:09 +01:00