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yakuizhao and wenlingz VHM: Check null-pointer of vhm_req before updating state of emulated …

The function of acrn_ioreq_get_reqbuf can return NULL-pointer when the
corresponding client_id is freed. In such case the null pointer is used
in the course of updating state of emulated io_request. This will cause
the kernel panic.

Traced-On: projectacrn/acrn-hypervisor#2066
Signed-off-by: Zhao Yakui <>
Reviewed-by: Yin, FengWei <>
Latest commit da0e0e6 Dec 14, 2018
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Documentation stm class: SPDX-ify the documentation Nov 12, 2018
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text Oct 18, 2018
arch SOS: Guest x2APIC support for SOS Dec 3, 2018
block block: export block_class to be used by class interfaces Nov 12, 2018
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() Aug 22, 2018
crypto Merge tag 'dmaengine-4.19-rc1' of git://… Aug 18, 2018
drivers VHM: Check null-pointer of vhm_req before updating state of emulated … Dec 14, 2018
firmware Import the fimrware Dec 3, 2018
fs LSM: Allow mount options from multiple security modules Nov 12, 2018
include virtio_blk: add discard and write zeroes support Dec 13, 2018
init Merge tag 'kbuild-v4.19-2' of git://… Aug 25, 2018
ipc ipc/shm.c: use ERR_CAST() for shm_lock() error return Oct 5, 2018
kernel reboot: add reboot_panic parameter Nov 12, 2018
lib lib: Fix ia64 bootloader linkage Nov 12, 2018
mm mm: export some vm_area APIs Nov 12, 2018
net Netfilter: Add a selection for Smack Nov 12, 2018
samples samples: disable CONFIG_SAMPLES for UML Oct 10, 2018
scripts Merge tag 'kbuild-fixes-v4.19-2' of git://… Oct 11, 2018
security security: add keystore driver support Nov 12, 2018
sound ASoC: Intel: Skylake: refactor memory management in skl_platform_regi… Nov 27, 2018
tools tools/rpmb: add support for nvme device Nov 12, 2018
usr initramfs: move from scripts/ to usr/ Aug 22, 2018
virt KVM: Remove obsolete kvm_unmap_hva notifier backend Sep 7, 2018
.clang-format clang-format: Set IndentWrappedFunctionNames false Aug 1, 2018
.cocciconfig scripts: add Linux .cocciconfig for coccinelle Jul 22, 2016
.get_maintainer.ignore Add hch to .get_maintainer.ignore Aug 21, 2015
.gitattributes .gitattributes: set git diff driver for C source code files Oct 8, 2016
.gitignore Merge tag 'kbuild-v4.17-2' of git://… Apr 16, 2018
.mailmap Merge tag 'libnvdimm-for-4.19_misc' of… Aug 26, 2018
COPYING COPYING: use the new text with points to the license files Mar 23, 2018
CREDITS 9p: remove Ron Minnich from MAINTAINERS Aug 17, 2018
Kbuild Merge tag 'kbuild-v4.15' of git://… Nov 18, 2017
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt Aug 1, 2018
MAINTAINERS Integration of CBC line discipline kernel module Nov 27, 2018
Makefile Linux 4.19 Oct 22, 2018
README Docs: Added a pointer to the formatted docs to README Mar 21, 2018 Add the Intel specific README file Nov 12, 2018 TEE/OPTEE: Adds a kernel internal TEE client interface Nov 12, 2018
kernel_config_sos ACRN: Container support for SOS Dec 14, 2018
kernel_config_uefi_sos SOS: Guest x2APIC support for UEFI SOS Dec 6, 2018
kernel_config_uos UOS: Guest x2APIC support for UOS kernel Dec 3, 2018


Linux kernel

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.