[android-porting] Kernel panic at 'copy_to_user()' function execution in AOSP 9

[Jaymin D]

Hi All,

I am facing kernel panic issue at 'copy_to_user()' function execution in
Kernel msm-3.18.
Below are my development environment:

PLATFORM_VERSION_CODENAME=REL

PLATFORM_VERSION=9
TARGET_PRODUCT=msm8953_64
TARGET_BUILD_VARIANT=userdebug
TARGET_BUILD_TYPE=release
TARGET_ARCH=arm64
TARGET_ARCH_VARIANT=armv8-a
TARGET_CPU_VARIANT=generic
TARGET_2ND_ARCH=arm
TARGET_2ND_ARCH_VARIANT=armv8-a
TARGET_2ND_CPU_VARIANT=cortex-a53
HOST_ARCH=x86_64
HOST_2ND_ARCH=x86
HOST_OS=linux
HOST_OS_EXTRA=Linux-4.15.0-36-generic-x86_64-Ubuntu-16.04.5-LTS
HOST_CROSS_OS=windows
HOST_CROSS_ARCH=x86
HOST_CROSS_2ND_ARCH=x86_64
HOST_BUILD_TYPE=release
BUILD_ID=PKQ1.180819.001
OUT_DIR=out

Below is the error output:

[ 19.998965] Kernel panic - not syncing: Accessing user space memory

outside uaccess.h routines

There are HBI drivers in drivers/hbi directory, and in HBI_OPEN case at
below function kernel panic happens:

ret = copy_from_user(&devcfg,
(const void __user*)(openArg.pDevCfg),
sizeof(hbi_dev_cfg_t));

Please let me know, if more information require.

If anyone have an idea, please help to solving this issue.

Regards,
Jaymin