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47f1204329
linux/arch/arm
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Will Deacon 47f1204329 ARM: 7487/1: mm: avoid setting nG bit for user mappings that aren't present 
Swap entries are encoding in ptes such that !pte_present(pte) and
pte_file(pte). The remaining bits of the descriptor are used to identify
the swapfile and offset within it to the swap entry.

When writing such a pte for a user virtual address, set_pte_at
unconditionally sets the nG bit, which (in the case of LPAE) will
corrupt the swapfile offset and lead to a BUG:

[  140.494067] swap_free: Unused swap offset entry 000763b4
[  140.509989] BUG: Bad page map in process rs:main Q:Reg  pte:0ec76800 pmd:8f92e003

This patch fixes the problem by only setting the nG bit for user
mappings that are actually present.

Cc: <stable@vger.kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-08-11 09:15:59 +01:00
..
boot ARM: arm-soc Marvell Orion device-tree updates 2012-08-02 11:50:24 -07:00
common ARM: dma-mapping: add support for dma_get_sgtable() 2012-07-30 12:25:47 +02:00
configs Merge branch 'dmaengine' of git://git.linaro.org/people/rmk/linux-arm 2012-08-01 16:41:07 -07:00
include/asm ARM: 7487/1: mm: avoid setting nG bit for user mappings that aren't present 2012-08-11 09:15:59 +01:00
kernel ARM: 7486/1: sched_clock: update epoch_cyc on resume 2012-08-11 09:15:58 +01:00
lib arch: remove direct definitions of KERN_<LEVEL> uses 2012-07-30 17:25:13 -07:00
mach-at91 Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2012-07-26 13:00:59 -07:00
mach-bcmring
mach-clps711x ARM: clps711x: Remove the setting of the time 2012-07-17 22:24:30 +02:00
mach-cns3xxx
mach-davinci fbdev updates for 3.6 2012-08-01 10:45:12 -07:00
mach-dove ARM: Orion: DT support for IRQ and GPIO Controllers 2012-07-27 16:48:14 +02:00
mach-ebsa110
mach-ep93xx arm-soc: soc-specific updates 2012-07-23 16:08:40 -07:00
mach-exynos MFD bits for the 3.6 merge window. 2012-07-30 12:41:17 -07:00
mach-footbridge
mach-gemini
mach-h720x
mach-highbank clk: add highbank clock support 2012-07-11 17:58:47 -07:00
mach-imx GPIO changes for v3.6: 2012-07-26 13:56:38 -07:00
mach-integrator ARM: integrator: convert to common clock 2012-07-11 17:58:45 -07:00
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx - More robust parsing especially of xattr data in JFFS2 2012-06-01 16:55:42 -07:00
mach-kirkwood ARM: Kirkwood: Replace mrvl with marvell 2012-07-27 16:50:57 +02:00
mach-ks8695
mach-l7200/include/mach
mach-lpc32xx ARM: LPC32xx: Add PWM clock 2012-07-20 14:01:51 +02:00
mach-mmp ARM: mmp: add missing irqs.h 2012-08-02 10:15:59 -07:00
mach-msm ARM: MSM: use SGI0 to wake secondary CPUs 2012-07-09 17:39:36 +01:00
mach-mv78xx0 ARM: Orion: DT support for IRQ and GPIO Controllers 2012-07-27 16:48:14 +02:00
mach-mvebu arm: mvebu: generate DTBs for supported SoCs 2012-07-17 22:38:06 +02:00
mach-mxs ARM: mxs: fix compile error caused by prom_update_property change 2012-07-25 22:36:39 -07:00
mach-netx arch/arm/mach-netx/fb.c: reuse dummy clk routines for CONFIG_HAVE_CLK=n 2012-07-30 17:25:13 -07:00
mach-nomadik ARM: nomadik: bump all IRQ numbers by one 2012-06-11 12:40:14 +02:00
mach-omap1 Merge branch 'dmaengine' of git://git.linaro.org/people/rmk/linux-arm 2012-08-01 16:41:07 -07:00
mach-omap2 ARM: arm-soc: cpuidle enablement for OMAP 2012-08-02 11:48:54 -07:00
mach-orion5x ARM: Orion: DT support for IRQ and GPIO Controllers 2012-07-27 16:48:14 +02:00
mach-picoxcell clocksource: dw_apb_timer: Add common DTS glue for dw_apb_timer 2012-07-12 17:26:09 +02:00
mach-pnx4008 arm-soc: sweeping late_initcall cleanup 2012-05-26 13:14:01 -07:00
mach-prima2 ARM: PRIMA2: delete redundant codes to restore LATCHED when timer resumes 2012-08-02 10:05:27 -07:00
mach-pxa This patch series contains a major revamp of how we collect entropy 2012-07-31 19:07:42 -07:00
mach-realview
mach-rpc ARM: fiq: change FIQ_START to a variable 2012-07-01 21:59:19 +08:00
mach-s3c24xx arm-soc: device tree description updates 2012-07-23 16:17:43 -07:00
mach-s3c64xx ARM: arm-soc soc updates, take 2 2012-07-30 09:45:53 -07:00
mach-s3c2410
mach-s3c2412
mach-s3c2440
mach-s5p64x0 arm-soc: device tree description updates 2012-07-23 16:17:43 -07:00
mach-s5pc100 arm-soc: device tree description updates 2012-07-23 16:17:43 -07:00
mach-s5pv210 arm-soc: board specific updates 2012-07-23 17:34:48 -07:00
mach-sa1100 Merge branches 'audit', 'delay', 'fixes', 'misc' and 'sta2x11' into for-linus 2012-07-27 23:06:32 +01:00
mach-shark
mach-shmobile ARM: arm-soc board updates, take 2 2012-07-30 09:48:00 -07:00
mach-socfpga ARM: socfpga: initial support for Altera's SOCFPGA platform 2012-07-19 10:39:00 +02:00
mach-spear3xx Merge branch 'dmaengine' of git://git.linaro.org/people/rmk/linux-arm 2012-08-01 16:41:07 -07:00
mach-spear6xx Merge branch 'dmaengine' of git://git.linaro.org/people/rmk/linux-arm 2012-08-01 16:41:07 -07:00
mach-spear13xx Viresh has moved 2012-06-20 14:39:36 -07:00
mach-tegra Merge branch 'for-3.6' of git://gitorious.org/linux-pwm/linux-pwm 2012-07-30 09:22:37 -07:00
mach-u300 ARM: u300: convert to common clock 2012-07-11 15:36:45 -07:00
mach-ux500 MFD bits for the 3.6 merge window. 2012-07-30 12:41:17 -07:00
mach-versatile ARM: fix mach-versatile/pci.c warning 2012-07-04 17:04:57 +01:00
mach-vexpress ARM: vexpress: Config option for early printk console 2012-07-13 11:48:29 +01:00
mach-vt8500 Merge branch 'for-3.6' of git://gitorious.org/linux-pwm/linux-pwm 2012-07-30 09:22:37 -07:00
mach-w90x900
mach-zynq
mm ARM: 7487/1: mm: avoid setting nG bit for user mappings that aren't present 2012-08-11 09:15:59 +01:00
net ARM: 7421/1: bpf_jit: BPF_S_ANC_ALU_XOR_X support 2012-06-14 15:12:13 +01:00
nwfpe
oprofile ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration 2012-07-09 17:41:10 +01:00
plat-iop
plat-mxc ARM: SoC fixes 2012-08-02 11:48:20 -07:00
plat-nomadik i2c-nomadik: move header to <linux/platform_data/i2c-nomadik.h> 2012-07-09 11:40:40 +02:00
plat-omap Merge branch 'dmaengine' of git://git.linaro.org/people/rmk/linux-arm 2012-08-01 16:41:07 -07:00
plat-orion ARM: Orion: Add arch support needed for I2C via DT. 2012-07-27 16:48:29 +02:00
plat-pxa Merge branch 'for-3.6' of git://gitorious.org/linux-pwm/linux-pwm 2012-07-30 09:22:37 -07:00
plat-s3c24xx ARM: fiq: change FIQ_START to a variable 2012-07-01 21:59:19 +08:00
plat-samsung Merge branch 'for-3.6' of git://gitorious.org/linux-pwm/linux-pwm 2012-07-30 09:22:37 -07:00
plat-spear Merge branch 'dmaengine' of git://git.linaro.org/people/rmk/linux-arm 2012-08-01 16:41:07 -07:00
plat-versatile Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-07-27 15:14:26 -07:00
tools
vfp ARM: 7483/1: vfp: only advertise VFPv4 in hwcaps if CONFIG_VFPv3 is enabled 2012-08-11 09:15:57 +01:00
Kconfig ARM: 7484/1: Don't enable GENERIC_LOCKBREAK with ticket spinlocks 2012-08-11 09:15:58 +01:00
Kconfig-nommu
Kconfig.debug Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-07-27 15:14:26 -07:00
Makefile Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-07-27 15:14:26 -07:00