WSL2-Linux-Kernel/drivers/auxdisplay
Luiz Sampaio 4ed66cdc54 auxdisplay: charlcd: checking for pointer reference before dereferencing
[ Upstream commit 4daa9ff89e ]

Check if the pointer lcd->ops->init_display exists before dereferencing it.
If a driver called charlcd_init() without defining the ops, this would
return segmentation fault, as happened to me when implementing a charlcd
driver.  Checking the pointer before dereferencing protects from
segmentation fault.

Signed-off-by: Luiz Sampaio <sampaio.ime@gmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-01-11 15:35:17 +01:00
..
Kconfig auxdisplay: Fix duplicate CHARLCD config symbol 2021-01-25 22:14:19 +01:00
Makefile auxdisplay: add a driver for lcd2s character display 2020-11-04 11:04:05 +01:00
arm-charlcd.c auxdisplay: Replace HTTP links with HTTPS ones 2020-08-08 16:10:03 +02:00
cfag12864b.c auxdisplay: Replace symbolic permissions with octal permissions 2021-07-16 07:42:35 +02:00
cfag12864bfb.c treewide: Miguel has moved 2021-02-26 09:41:03 -08:00
charlcd.c auxdisplay: charlcd: checking for pointer reference before dereferencing 2022-01-11 15:35:17 +01:00
charlcd.h auxdisplay: Change gotoxy calling interface 2020-11-04 11:04:04 +01:00
hd44780.c auxdisplay: hd44780: Fix oops on module unloading 2021-07-16 07:42:27 +02:00
hd44780_common.c auxdisplay: Change gotoxy calling interface 2020-11-04 11:04:04 +01:00
hd44780_common.h auxdisplay: Change gotoxy calling interface 2020-11-04 11:04:04 +01:00
ht16k33.c auxdisplay: ht16k33: Fix frame buffer device blanking 2021-11-18 19:17:02 +01:00
img-ascii-lcd.c auxdisplay: img-ascii-lcd: Fix lock-up when displaying empty string 2021-11-18 19:17:02 +01:00
ks0108.c auxdisplay: Replace symbolic permissions with octal permissions 2021-07-16 07:42:35 +02:00
lcd2s.c auxdisplay: fix platform_no_drv_owner.cocci warnings 2020-11-14 09:52:35 +01:00
panel.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00