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Jiang Biao b2b7d986a8 x86/pti: Check the return value of pti_user_pagetable_walk_p4d() 
pti_user_pagetable_walk_p4d() can return NULL, so the return value should
be checked to prevent a NULL pointer dereference.

Add the check and a warning when the P4D allocation fails.

Signed-off-by: Jiang Biao <jiang.biao2@zte.com.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: dave.hansen@linux.intel.com
Cc: luto@kernel.org
Cc: hpa@zytor.com
Cc: albcamus@gmail.com
Cc: zhong.weidong@zte.com.cn
Link: https://lkml.kernel.org/r/1532045192-49622-1-git-send-email-jiang.biao2@zte.com.cn
2018-07-20 07:07:39 +02:00
..
alpha
alpha: Remove custom dec_and_lock() implementation
2018-06-12 23:33:24 +02:00
arc
mm: introduce ARCH_HAS_PTE_SPECIAL
2018-06-07 17:34:35 -07:00
arm
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
2018-07-13 11:44:12 -07:00
arm64
arm64: neon: Fix function may_use_simd() return error status
2018-07-11 17:02:02 +01:00
c6x
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-04 20:27:54 -07:00
h8300
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-04 20:27:54 -07:00
hexagon
hexagon: drop the unused variable zero_page_mask
2018-06-15 07:55:25 +09:00
ia64
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
m68k
m68k: fix "bad page state" oops on ColdFire boot
2018-07-02 10:05:13 +10:00
microblaze
Microblaze patches for 4.18-rc3
2018-06-27 09:49:30 -07:00
mips
MIPS: Fix ioremap() RAM check
2018-07-05 14:43:21 -07:00
nds32
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-04 20:27:54 -07:00
nios2
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-04 20:27:54 -07:00
openrisc
openrisc: entry: Fix delay slot exception detection
2018-07-01 16:48:24 +09:00
parisc
parisc: Build kernel without -ffunction-sections
2018-06-29 17:27:20 +02:00
powerpc
Kbuild fixes for v4.18
2018-06-30 13:05:30 -07:00
riscv
RISC-V: Fix the rv32i kernel build
2018-07-04 14:12:53 -07:00
s390
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2018-07-06 09:14:34 -07:00
sh
arch/*: Kconfig: fix documentation for NMI watchdog
2018-06-15 12:48:59 -03:00
sparc
arch/*: Kconfig: fix documentation for NMI watchdog
2018-06-15 12:48:59 -03:00
um
Solve a series of broken links for files under Documentation:
2018-06-17 05:25:18 +09:00
unicore32
docs: Fix some broken references
2018-06-15 18:10:01 -03:00
x86
x86/pti: Check the return value of pti_user_pagetable_walk_p4d()
2018-07-20 07:07:39 +02:00
xtensa
docs: Fix some broken references
2018-06-15 18:10:01 -03:00
.gitignore
…
Kconfig
docs: Fix some broken references
2018-06-15 18:10:01 -03:00