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3e0f897fd9
linux/drivers/tty
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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 <mlevitsk@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20210608144239.12697-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 tty: evh_bytechan: Fix out of bounds accesses 2020-03-17 23:40:31 +11:00
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 tty: fix spelling mistake 2020-06-27 16:21:20 +02:00
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