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c61c7def1f
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Huacai Chen c61c7def1f
MIPS: VDSO: Reduce VDSO_RANDOMIZE_SIZE to 64MB for 64bit 
Commit ea7e0480a4 ("MIPS: VDSO: Always map near top of user memory")
set VDSO_RANDOMIZE_SIZE to 256MB for 64bit kernel. But take a look at
arch/mips/mm/mmap.c we can see that MIN_GAP is 128MB, which means the
mmap_base may be at (user_address_top - 128MB). This make the stack be
surrounded by mmaped areas, then stack expanding fails and causes a
segmentation fault. Therefore, VDSO_RANDOMIZE_SIZE should be less than
MIN_GAP and this patch reduce it to 64MB.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Fixes: ea7e0480a4 ("MIPS: VDSO: Always map near top of user memory")
Patchwork: https://patchwork.linux-mips.org/patch/20910/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: Huacai Chen <chenhuacai@gmail.com>
2018-10-16 09:47:18 -07:00
..
alchemy mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
ar7 mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
ath25 mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
ath79 Here are the main MIPS changes for 4.19. 2018-08-13 19:24:32 -07:00
bcm47xx Revert "MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe erratum" 2018-07-27 10:07:32 -07:00
bcm63xx mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
bmips MIPS: bmips: remove unnecessary call to register "simple-bus" 2018-06-24 09:27:27 -07:00
boot kbuild: rename LDFLAGS to KBUILD_LDFLAGS 2018-08-24 08:22:08 +09:00
cavium-octeon Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-08-15 16:01:47 -07:00
cobalt
configs Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-08-15 15:04:25 -07:00
crypto MIPS: crypto: Add crc32 and crc32c hw accelerated module 2018-02-19 20:50:36 +00:00
dec MIPS: Convert update_persistent_clock() to update_persistent_clock64() 2018-05-14 23:58:23 +01:00
emma
fw mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
generic MIPS: Remove obsolete MIPS checks for DST node "chosen@0" 2018-08-06 09:50:33 -07:00
include MIPS: VDSO: Reduce VDSO_RANDOMIZE_SIZE to 64MB for 64bit 2018-10-16 09:47:18 -07:00
jazz MIPS: Make (UN)CAC_ADDR() PHYS_OFFSET-agnostic 2018-07-30 10:27:20 -07:00
jz4740 JFFS2 changes: 2018-08-14 10:57:44 -07:00
kernel MIPS: Fix CONFIG_CMDLINE handling 2018-09-28 12:09:04 -07:00
kvm KVM: Remove obsolete kvm_unmap_hva notifier backend 2018-09-07 15:06:02 +02:00
lantiq MIPS: lantiq: dma: add dev pointer 2018-09-11 23:33:19 -07:00
lasat kbuild: rename LDFLAGS to KBUILD_LDFLAGS 2018-08-24 08:22:08 +09:00
lib MIPS: memset: Fix CPU_DADDI_WORKAROUNDS `small_fixup' regression 2018-10-05 09:41:39 -07:00
loongson32 MIPS: Loongson: Merge load addresses 2018-07-30 18:59:01 -07:00
loongson64 MIPS: Loongson: Add Loongson-3A R3.1 basic support 2018-07-23 17:53:34 -07:00
math-emu MIPS: math-emu: Mark fall throughs in switch statements with a comment 2017-12-12 17:20:20 +01:00
mm A few MIPS fixes for 4.19: 2018-08-23 14:23:08 -07:00
mti-malta MIPS: Malta: Use PIIX4 poweroff driver to power down 2018-06-24 09:27:27 -07:00
net bpf, mips: remove unused function 2018-05-14 19:11:45 -07:00
netlogic mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
oprofile MIPS: perf: More robustly probe for the presence of per-tc counters 2018-05-15 15:16:16 +01:00
paravirt mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
pci Here are the main MIPS changes for 4.19. 2018-08-13 19:24:32 -07:00
pic32 mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
pistachio License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pmcs-msp71xx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pnx833x mtd: nand: Rename nand.h into rawnand.h 2017-08-13 10:11:49 +02:00
power License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ralink mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
rb532 MIPS: RB532: Avoid undefined mac_pton without GENERIC_NET_UTILS 2018-01-10 16:39:03 +01:00
sgi-ip22 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-13 17:56:58 -08:00
sgi-ip27 mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
sgi-ip32 MIPS: IP32: use generic dma noncoherent ops 2018-06-24 09:27:27 -07:00
sibyte mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
sni MIPS: sni: Remove the read_persistent_clock() 2018-05-14 23:58:25 +01:00
tools Update MIPS email addresses 2017-11-03 09:02:30 -07:00
txx9 JFFS2 changes: 2018-08-14 10:57:44 -07:00
vdso MIPS: VDSO: Force link endianness 2018-08-07 16:16:13 -07:00
vr41xx MIPS: Annotate cpu_wait implementations with __cpuidle 2018-06-28 14:18:54 -07:00
Kbuild MIPS: Disable Werror when W= is set 2017-04-10 11:56:07 +02:00
Kbuild.platforms MIPS: Xilfpga: Switch to using generic defconfigs 2017-11-08 22:54:14 +00:00
Kconfig A few MIPS fixes for 4.19: 2018-08-23 14:23:08 -07:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile kbuild: rename LDFLAGS to KBUILD_LDFLAGS 2018-08-24 08:22:08 +09:00
Makefile.postlink License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00