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android_kernel_oneplus_msm8998/arch/arm
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Doug Berger f1717aab21 ARM: 8874/1: mm: only adjust sections of valid mm structures 
[ Upstream commit c51bc12d06b3a5494fbfcbd788a8e307932a06e9 ]

A timing hazard exists when an early fork/exec thread begins
exiting and sets its mm pointer to NULL while a separate core
tries to update the section information.

This commit ensures that the mm pointer is not NULL before
setting its section parameters. The arguments provided by
commit 11ce4b33aedc ("ARM: 8672/1: mm: remove tasklist locking
from update_sections_early()") are equally valid for not
requiring grabbing the task_lock around this check.

Fixes: 08925c2f12 ("ARM: 8464/1: Update all mm structures with section adjustments")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Laura Abbott <labbott@redhat.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Rob Herring <robh@kernel.org>
Cc: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-09-21 07:12:50 +02:00
..
boot ARM: dts: rockchip: Mark that the rk3288 timer might stop in suspend 2019-08-06 18:28:25 +02:00
common ARM: sa1111: fix pcmcia suspend/resume 2016-10-07 15:23:44 +02:00
configs Revert "ARM: imx_v6_v7_defconfig: Select ULPI support" 2018-09-15 09:40:40 +02:00
crypto crypto: arm/aes-neonbs - don't access already-freed walk.iv 2019-06-11 12:23:41 +02:00
firmware
include ARM: avoid Cortex-A9 livelock on tight dmb loops 2019-04-27 09:33:52 +02:00
kernel ARM: 8839/1: kprobe: make patch_lock a raw_spinlock_t 2019-04-27 09:33:59 +02:00
kvm KVM: arm/arm64: Only skip MMIO insn once 2019-09-10 10:29:49 +01:00
lib ARM: 8833/1: Ensure that NEON code always compiles with Clang 2019-04-27 09:33:51 +02:00
mach-alpine
mach-asm9260
mach-at91 ARM: remove duplicate 'const' annotations' 2017-10-08 10:14:20 +02:00
mach-axxia
mach-bcm ARM: remove duplicate 'const' annotations' 2017-10-08 10:14:20 +02:00
mach-berlin
mach-clps711x
mach-cns3xxx ARM: cns3xxx: Fix writing to wrong PCI config registers after alignment 2019-02-06 19:43:07 +01:00
mach-davinci ARM: davinci: fix sleep.S build error on ARMv4 2019-08-25 10:52:49 +02:00
mach-digicolor
mach-dove ARM: dove: Fix legacy get_irqnr_and_base 2015-11-25 14:59:12 +00:00
mach-ebsa110
mach-efm32
mach-ep93xx
mach-exynos ARM: exynos: Fix undefined instruction during Exynos5422 resume 2019-06-22 08:18:22 +02:00
mach-footbridge
mach-gemini
mach-highbank
mach-hisi ARM: hisi: check of_iomap and fix missing of_node_put 2018-09-26 08:35:09 +02:00
mach-imx ARM: imx: cpuidle-imx6sx: Restrict the SW2ISO increase to i.MX6SX 2019-07-10 09:56:33 +02:00
mach-integrator gpio: pl061: handle failed allocations 2019-02-20 10:13:21 +01:00
mach-iop13xx ARM: iop: don't use using 64-bit DMA masks 2019-05-16 19:45:02 +02:00
mach-iop32x ARM: iop32x/n2100: fix PCI IRQ mapping 2019-02-20 10:13:19 +01:00
mach-iop33x
mach-ixp4xx ARM: ixp4xx: fix read{b,w,l} return types 2015-12-01 23:45:30 +01:00
mach-keystone
mach-ks8695
mach-lpc18xx
mach-lpc32xx
mach-mediatek ARM: SoC platform updates for v4.4 2015-11-10 14:56:23 -08:00
mach-meson
mach-mmp
mach-moxart
mach-mv78xx0
mach-mvebu ARM: mvebu: declare asm symbols as character arrays in pmsu.c 2018-10-10 08:52:06 +02:00
mach-mxs
mach-netx
mach-nomadik
mach-nspire
mach-omap1 ARM: OMAP1: ams-delta: Fix possible use of uninitialized field 2018-12-17 21:55:09 +01:00
mach-omap2 ARM: OMAP2+: Fix omap4 errata warning on other SoCs 2019-09-21 07:12:48 +02:00
mach-orion5x ARM: orion5x: Fix legacy get_irqnr_and_base 2015-11-25 15:01:00 +00:00
mach-picoxcell
mach-prima2 ARM: prima2: always enable reset controller 2016-05-04 14:48:53 -07:00
mach-pxa ARM: pxa: avoid section mismatch warning 2019-02-20 10:13:09 +01:00
mach-qcom
mach-realview net: smc91x: fix SMC accesses 2016-09-30 10:18:37 +02:00
mach-rockchip
mach-rpc ARM: riscpc: fix DMA 2019-08-06 18:28:24 +02:00
mach-s3c24xx ARM: s3c24xx: Fix boolean expressions in osiris_dvs_notify 2019-03-23 08:44:38 +01:00
mach-s3c64xx ASoC: samsung: pass DMA channels as pointers 2016-04-12 09:08:32 -07:00
mach-s5pv210
mach-sa1100 ARM: sa1100: clear reset status prior to reboot 2016-10-07 15:23:43 +02:00
mach-shmobile ARM: shmobile: fix regulator quirk for Gen2 2016-10-07 15:23:43 +02:00
mach-socfpga ARM: SoCFPGA: Fix secondary CPU startup in thumb2 kernel 2016-05-11 11:21:14 +02:00
mach-spear ARM: remove duplicate 'const' annotations' 2017-10-08 10:14:20 +02:00
mach-sti
mach-stm32
mach-sunxi ARM: SoC platform updates for v4.4 2015-11-10 14:56:23 -08:00
mach-tegra ARM: tegra: select USB_ULPI from EHCI rather than platform 2018-02-25 11:03:51 +01:00
mach-u300 spi: Updates for v4.4 2015-11-05 13:15:12 -08:00
mach-uniphier ARM: uniphier: rework SMP operations to use trampoline code 2015-10-27 09:20:53 +09:00
mach-ux500 ARM: ux500: fix prcmu_is_cpu_in_wfi() calculation 2017-01-26 08:23:49 +01:00
mach-versatile
mach-vexpress
mach-vt8500
mach-w90x900
mach-zx ARM: zx: only build power domain code when CONFIG_PM=y 2015-11-19 16:16:45 +01:00
mach-zynq ARM: zynq: Reserve correct amount of non-DMA RAM 2017-01-15 13:41:36 +01:00
mm ARM: 8874/1: mm: only adjust sections of valid mm structures 2019-09-21 07:12:50 +02:00
net ARM: net: bpf: fix zero right shift 2016-01-06 01:32:09 -05:00
nwfpe
oprofile
plat-iop ARM: iop: don't use using 64-bit DMA masks 2019-05-16 19:45:02 +02:00
plat-omap ARM: OMAP: Fix dmtimer init for omap1 2018-05-30 07:49:00 +02:00
plat-orion ARM: orion: don't use using 64-bit DMA masks 2019-05-16 19:45:02 +02:00
plat-pxa ARM: pxa: ssp: unneeded to free devm_ allocated data 2019-03-23 08:44:27 +01:00
plat-samsung ARM: samsung: Limit SAMSUNG_PM_CHECK config option to non-Exynos platforms 2019-04-27 09:33:58 +02:00
plat-versatile
probes ARM: 8770/1: kprobes: Prohibit probing on optimized_callback 2018-05-26 08:48:57 +02:00
tools
vdso ARM: 8449/1: fix bug in vdsomunge swab32 macro 2015-10-29 15:20:15 +00:00
vfp
xen swiotlb-xen: implement xen_swiotlb_dma_mmap callback 2017-10-05 09:41:48 +02:00
Kconfig ARM: 8510/1: rework ARM_CPU_SUSPEND dependencies 2019-04-03 06:23:23 +02:00
Kconfig-nommu ARM: 8635/1: nommu: allow enabling REMAP_VECTORS_TO_RAM 2017-10-08 10:14:17 +02:00
Kconfig.debug ARM: debug-ll: fix BCM63xx entry for multiplatform 2016-03-03 15:07:08 -08:00
Makefile