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Changbin Du 7e5f3d3086 drm/i915/gvt: fix crash at function release_shadow_wa_ctx 
In function dispatch_workload(), if it fail before calling
intel_gvt_scan_and_shadow_wa_ctx(), the indirect ctx will
not be shadowed so no cleaup need. wa_ctx->indirect_ctx.obj
indicate whether indirect_ctx is shadowed. The obj is null
if it is unshadowed.

BUG: unable to handle kernel NULL pointer dereference at
00000000000001a0
IP: complete_execlist_workload+0x2c9/0x3e0 [i915]
Oops: 0002 [#1] SMP
task: ffff939546d2d880 task.stack: ffffbd9b82ac4000
RIP: 0010:complete_execlist_workload+0x2c9/0x3e0 [i915]
RSP: 0018:ffffbd9b82ac7dd8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff9393c725b540 RCX: 0000000000000006
RDX: 0000000000000007 RSI: 0000000000000202 RDI: ffff939559c8dd00
RBP: ffffbd9b82ac7e18 R08: 0000000000000001 R09: 000000000120dd8f
R10: 0000000000000000 R11: 000000000120dd8f R12: ffff9393c725b540
R13: ffff9393c725b618 R14: ffffbd9b81f0d000 R15: ffff939520e0e000
FS:  0000000000000000(0000) GS:ffff939559c80000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000001a0 CR3: 000000043d664000 CR4: 00000000003426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 workload_thread+0x312/0xd70 [i915]
 ? __wake_up_sync+0x20/0x20
 ? wake_atomic_t_function+0x60/0x60
 kthread+0x101/0x140

Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
History 2017-02-10 16:50:18 +08:00
arch Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into drm-next 2017-01-27 11:00:42 +10:00
block blk-mq: Remove unused variable 2017-01-18 15:14:15 -07:00
certs certs: Add a secondary system keyring that can be added to dynamically 2016-04-11 22:48:09 +01:00
crypto crypto: testmgr - Use heap buffer for acomp test input 2016-12-27 17:32:11 +08:00
Documentation Merge tag 'drm-misc-next-2017-01-30' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-02-01 08:31:09 +10:00
drivers drm/i915/gvt: fix crash at function release_shadow_wa_ctx 2017-02-10 16:50:18 +08:00
firmware WHENCE: use https://linuxtv.org for LinuxTV URLs 2015-12-04 10:35:11 -02:00
fs romfs: use different way to generate fsid for BLOCK or MTD 2017-01-24 16:26:14 -08:00
include Merge branch 'drm-next-4.11' of git://people.freedesktop.org/~agd5f/linux into drm-next 2017-02-01 08:39:35 +10:00
init cgroup: move CONFIG_SOCK_CGROUP_DATA to init/Kconfig 2017-01-11 09:47:10 -05:00
ipc ipc/sem.c: fix incorrect sem_lock pairing 2017-01-10 18:31:55 -08:00
kernel sysctl: fix proc_doulongvec_ms_jiffies_minmax() 2017-01-26 09:21:24 -08:00
lib Merge tag 'drm-misc-next-2017-01-30' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-02-01 08:31:09 +10:00
mm mm, page_alloc: fix premature OOM when racing with cpuset mems update 2017-01-24 16:26:14 -08:00
net Three filesystem endianness fixes (one goes back to the 2.6 era, all 2017-01-20 12:15:48 -08:00
samples Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-01-15 11:37:43 -08:00
scripts gcc-plugins: update gcc-common.h for gcc-7 2017-01-03 12:08:59 -08:00
security Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sound Merge tag 'drm-intel-next-2017-01-23' of git://anongit.freedesktop.org/git/drm-intel into drm-next 2017-01-27 12:08:32 +10:00
tools Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into drm-next 2017-01-27 11:00:42 +10:00
usr kbuild: initramfs cleanup, set target from Kconfig 2017-01-05 09:40:16 -08:00
virt KVM/ARM updates for 4.10-rc4 2017-01-17 15:04:59 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Add hch to .get_maintainer.ignore 2015-08-21 14:30:10 -07:00
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-08-02 16:48:52 -04:00
.mailmap mailmap: add codeaurora.org names for nameless email commits 2017-01-10 18:31:55 -08:00
COPYING [PATCH] update FSF address in COPYING 2005-09-10 10:06:29 -07:00
CREDITS CREDITS: Remove outdated address information 2016-12-21 15:21:29 -08:00
Kbuild scripts/gdb: provide linux constants 2016-05-23 17:04:14 -07:00
Kconfig kbuild: migrate all arch to the kconfig mainmenu upgrade 2010-09-19 22:54:11 -04:00
MAINTAINERS Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into drm-next 2017-01-27 11:00:42 +10:00
Makefile Linux 4.10-rc5 2017-01-22 12:54:15 -08:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

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.