Ard Biesheuvel 189af46571 ARM: smp: add support for per-task stack canaries ... On ARM, we currently only change the value of the stack canary when switching tasks if the kernel was built for UP. On SMP kernels, this is impossible since the stack canary value is obtained via a global symbol reference, which means a) all running tasks on all CPUs must use the same value b) we can only modify the value when no kernel stack frames are live on any CPU, which is effectively never. So instead, use a GCC plugin to add a RTL pass that replaces each reference to the address of the __stack_chk_guard symbol with an expression that produces the address of the 'stack_canary' field that is added to struct thread_info. This way, each task will use its own randomized value. Cc: Russell King <linux@armlinux.org.uk> Cc: Kees Cook <keescook@chromium.org> Cc: Emese Revfy <re.emese@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Laura Abbott <labbott@redhat.com> Cc: kernel-hardening@lists.openwall.com Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Kees Cook <keescook@chromium.org>		2018-12-12 13:20:07 -08:00
..
boot	ARM: smp: add support for per-task stack canaries	2018-12-12 13:20:07 -08:00
common	ARM: Add Krait L2 register accessor functions	2018-10-17 13:14:33 -07:00
configs	ARM: defconfig: Disable PREEMPT again on multi_v7	2018-11-05 06:34:09 -08:00
crypto	crypto: arm/crc32 - avoid warning when compiling with Clang	2018-09-21 13:24:52 +08:00
firmware	ARM: 32-bit SoC platform updates	2018-08-23 13:44:43 -07:00
include	ARM: smp: add support for per-task stack canaries	2018-12-12 13:20:07 -08:00
kernel	ARM: smp: add support for per-task stack canaries	2018-12-12 13:20:07 -08:00
kvm	ARM: KVM: Correctly order SGI register entries in the cp15 array	2018-10-09 11:55:47 +01:00
lib	Merge branches 'fixes', 'misc' and 'spectre' into for-next	2018-10-10 13:53:33 +01:00
mach-actions
mach-alpine
mach-artpec
mach-asm9260
mach-aspeed
mach-at91	ARM: SoC platform updates for 4.20	2018-10-29 15:37:33 -07:00
mach-axxia
mach-bcm	PCI: controller: Move PCI_DOMAINS selection to arch Kconfig	2018-06-26 15:37:37 -05:00
mach-berlin	ARM: berlin: switch to SPDX license identifier	2018-05-24 14:49:09 +08:00
mach-clps711x
mach-cns3xxx
mach-davinci	This time it looks like a quieter release cycle in the clk tree. I guess that's	2018-10-31 11:08:30 -07:00
mach-digicolor
mach-dove
mach-ebsa110
mach-efm32
mach-ep93xx	This is the bulk of GPIO changes for the v4.20 series:	2018-10-23 08:45:05 +01:00
mach-exynos	ARM: exynos: Fix imprecise abort during Exynos5422 suspend to RAM	2018-08-30 19:46:06 +02:00
mach-footbridge	treewide: kzalloc() -> kcalloc()	2018-06-12 16:19:22 -07:00
mach-gemini
mach-highbank
mach-hisi	ARM: hisi: handle of_iomap and fix missing of_node_put	2018-07-16 17:36:50 +01:00
mach-imx	ARM: SoC platform updates for 4.20	2018-10-29 15:37:33 -07:00
mach-integrator	mmc: mmci: Drop support for pdata GPIO numbers	2018-10-08 11:40:43 +02:00
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx	mtd: rawnand: Move platform_nand_xxx definitions out of rawnand.h	2018-10-03 11:12:25 +02:00
mach-keystone
mach-ks8695	i2c: gpio: move header to platform_data	2018-05-17 16:27:09 +02:00
mach-lpc18xx
mach-lpc32xx
mach-mediatek
mach-meson	ARM: meson: merge Kconfig symbol MACH_MESON8B into MACH_MESON8	2018-05-23 10:08:13 -07:00
mach-mmp	USB/PHY patches for 4.20-rc1	2018-10-26 08:14:13 -07:00
mach-moxart
mach-mv78xx0
mach-mvebu	ARM: mvebu: use dt_fixup to provide fallback for enable-method	2018-09-24 17:15:24 +02:00
mach-mxs
mach-netx
mach-nomadik
mach-npcm
mach-nspire
mach-omap1	Fix for omap1 ams-delta irq	2018-11-02 22:31:40 -07:00
mach-omap2	memblock: stop using implicit alignment to SMP_CACHE_BYTES	2018-10-31 08:54:16 -07:00
mach-orion5x	mtd: rawnand: Move platform_nand_xxx definitions out of rawnand.h	2018-10-03 11:12:25 +02:00
mach-oxnas
mach-picoxcell
mach-prima2
mach-pxa	regulator: Regulator updates for next release	2018-10-23 01:54:44 +01:00
mach-qcom
mach-realview
mach-rockchip	ARM: rockchip: Force CONFIG_PM on Rockchip systems	2018-08-24 08:50:23 -07:00
mach-rpc	mm: do not initialize TLB stack vma's with vma_init()	2018-08-01 13:43:38 -07:00
mach-s3c24xx	ARM: s3c24xx: Restore proper usage of pr_info/pr_cont	2018-09-19 19:11:17 +02:00
mach-s3c64xx	regulator: fixed: Convert to use GPIO descriptor only	2018-09-17 14:32:22 -07:00
mach-s5pv210
mach-sa1100	regulator: fixed: Convert to use GPIO descriptor only	2018-09-17 14:32:22 -07:00
mach-shmobile	ARM: SoC platform updates for 4.20	2018-10-29 15:37:33 -07:00
mach-socfpga	PCI: controller: Move PCI_DOMAINS selection to arch Kconfig	2018-06-26 15:37:37 -05:00
mach-spear
mach-sti
mach-stm32	ARM: stm32: Don't select DMA unconditionally on STM32MP157C	2018-05-25 15:26:38 -07:00
mach-sunxi
mach-tango
mach-tegra	ARM: SoC platform updates	2018-06-11 17:49:09 -07:00
mach-u300	ARM: u300: Delete dummy SPI chip	2018-09-06 10:02:26 -07:00
mach-uniphier	ARM: uniphier: select RESET_CONTROLLER	2018-07-31 19:04:41 -07:00
mach-ux500
mach-versatile	mmc: mmci: Drop support for pdata GPIO numbers	2018-10-08 11:40:43 +02:00
mach-vexpress	treewide: kzalloc() -> kcalloc()	2018-06-12 16:19:22 -07:00
mach-vt8500
mach-w90x900
mach-zx
mach-zynq	ARM: zynq: Convert to using %pOFn instead of device_node.name	2018-09-05 15:27:16 +02:00
mm	Merge branch 'spectre' of git://git.armlinux.org.uk/~rmk/linux-arm	2018-11-06 08:10:01 -08:00
net	ARM: net: bpf: improve 64-bit ALU implementation	2018-07-13 15:26:42 +02:00
nwfpe
oprofile
plat-iop
plat-omap	ARM/time: Remove read_boot_clock64()	2018-07-20 00:02:41 +02:00
plat-orion	ARM: orion: avoid VLA in orion_mpp_conf	2018-11-02 22:31:24 -07:00
plat-pxa	ARM: pxa: change SSP DMA channels allocation	2018-06-18 21:32:41 +02:00
plat-samsung	ARM: samsung: Limit SAMSUNG_PM_CHECK config option to non-Exynos platforms	2018-10-01 18:42:48 +02:00
plat-versatile
probes	Updates for v4.19:	2018-08-20 18:32:00 -07:00
tools	ARM: 8787/1: wire up io_pgetevents syscall	2018-09-19 10:44:11 +01:00
vdso	arm: port KCOV to arm	2018-06-15 07:55:24 +09:00
vfp	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-10-24 11:22:39 +01:00
xen	mm: remove include/linux/bootmem.h	2018-10-31 08:54:16 -07:00
Kconfig	ARM: smp: add support for per-task stack canaries	2018-12-12 13:20:07 -08:00
Kconfig-nommu
Kconfig.debug	ARM: SoC platform updates for 4.20	2018-10-29 15:37:33 -07:00
Makefile	ARM: smp: add support for per-task stack canaries	2018-12-12 13:20:07 -08:00