Laurent Dufour 64200db15c powerpc/crashdump : Fix page frame number check in copy_oldmem_page ...

commit f5295bd8ea upstream.

In copy_oldmem_page, the current check using max_pfn and min_low_pfn to
decide if the page is backed or not, is not valid when the memory layout is
not continuous.

This happens when running as a QEMU/KVM guest, where RTAS is mapped higher
in the memory. In that case max_pfn points to the end of RTAS, and a hole
between the end of the kdump kernel and RTAS is not backed by PTEs. As a
consequence, the kdump kernel is crashing in copy_oldmem_page when accessing
in a direct way the pages in that hole.

This fix relies on the memblock's service memblock_is_region_memory to
check if the read page is part or not of the directly accessible memory.

Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Tested-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-03-06 22:06:21 -08:00

..

vdso32

powerpc/8xx: mfspr SPRN_TBRx in lieu of mftb/mftbu is not supported

2013-11-22 16:56:48 -06:00

vdso64

powerpc: Wrong DWARF CFI in the kernel vdso for little-endian / ELFv2

2013-11-21 09:19:23 +11:00

.gitignore

powerpc: Ignore generated vmlinux.lds in git

2008-10-07 14:26:18 +11:00

align.c

powerpc: Enable Little Endian Alignment Handler for Float Pair Instructions

2013-10-30 16:01:23 +11:00

asm-offsets.c

powerpc: book3s: kvm: Don't abuse host r2 in exit path

2013-12-18 11:29:31 +01:00

audit.c

…

btext.c

powerpc/btext: Fix CONFIG_PPC_EARLY_DEBUG_BOOTX on ppc32

2013-08-27 16:01:23 +10:00

cacheinfo.c

powerpc: Make sure "cache" directory is removed when offlining cpu

2014-02-06 11:34:12 -08:00

cacheinfo.h

powerpc: Rewrite sysfs processor cache info code

2009-01-08 16:25:10 +11:00

clock.c

powerpc: various straight conversions from module.h --> export.h

2011-10-31 19:30:44 -04:00

compat_audit.c

…

cpu_setup_6xx.S

powerpc: Fix some 6xx/7xxx CPU setup functions

2011-02-07 12:57:11 +11:00

cpu_setup_44x.S

powerpc/44x: Add support for the AMCC APM821xx SoC

2010-10-13 08:47:09 -04:00

cpu_setup_a2.S

powerpc: Enforce usage of RA 0-R31 where possible

2012-07-10 19:18:35 +10:00

cpu_setup_fsl_booke.S

powerpc/85xx: Add machine check handler to fix PCIe erratum on mpc85xx

2013-07-30 15:50:07 -05:00

cpu_setup_pa6t.S

…

cpu_setup_power.S

powerpc: Fix TLB cleanup at boot on POWER8

2013-05-24 18:13:44 +10:00

cpu_setup_ppc970.S

powerpc, KVM: Split HVMODE_206 cpu feature bit into separate HV and architecture bits

2011-07-12 13:16:58 +03:00

cputable.c

Merge remote-tracking branch 'scott/next' into next

2013-08-09 16:01:40 +10:00

crash_dump.c

powerpc/crashdump : Fix page frame number check in copy_oldmem_page

2014-03-06 22:06:21 -08:00

crash.c

Disintegrate asm/system.h for PowerPC

2012-03-28 18:30:02 +01:00

dbell.c

powerpc: Add accounting for Doorbell interrupts

2013-04-18 15:59:55 +10:00

dma-iommu.c

powerpc/dma-iommu: Fix IOMMU window check

2012-08-24 20:26:07 +10:00

dma-swiotlb.c

powerpc/swiotlb: Enable at early stage and disable if not necessary

2012-09-12 14:57:09 -05:00

dma.c

powerpc/kernel: Remove uses of abs_to_virt() and virt_to_abs()

2012-09-05 15:19:30 +10:00

eeh_cache.c

powerpc/eeh: Remove reference to PCI device

2013-07-24 14:18:46 +10:00

eeh_dev.c

powerpc/eeh: Move common part to kernel directory

2013-06-20 17:05:35 +10:00

eeh_driver.c

powerpc/eeh: Fix unbalanced enable for IRQ

2013-07-24 14:18:49 +10:00

eeh_event.c

powerpc/eeh: More accurate log

2013-11-21 10:33:36 +11:00

eeh_pe.c

powerpc/eeh: Don't use pci_dev during BAR restore

2013-07-24 14:18:49 +10:00

eeh_sysfs.c

powerpc/eeh: Introdce flag to protect sysfs

2013-07-24 14:18:49 +10:00

eeh.c

powerpc/eeh: Enable PCI_COMMAND_MASTER for PCI bridges

2013-11-21 10:33:35 +11:00

entry_32.S

powerpc/32bit:Store temporary result in r0 instead of r8

2013-06-01 08:29:27 +10:00

entry_64.S

powerpc: Fix fatal SLB miss when restoring PPR

2013-11-06 14:13:53 +11:00

epapr_hcalls.S

powerpc: Add paravirt idle loop for 64-bit Book-E

2013-03-13 14:19:36 -05:00

epapr_paravirt.c

powerpc: add explicit OF includes

2013-10-09 20:04:11 -05:00

exceptions-64e.S

powerpc/booke64: Use common defines for AltiVec interrupts numbers

2013-10-16 18:46:40 -05:00

exceptions-64s.S

kvm: powerpc: Add kvmppc_ops callback

2013-10-17 15:24:26 +02:00

fadump.c

mm/ppc: use common help functions to free reserved pages

2013-04-29 15:54:30 -07:00

firmware.c

powerpc: fix implicit use of cache.h in kernel/firmware.c

2011-10-31 19:30:41 -04:00

fpu.S

powerpc: Don't corrupt user registers on 32-bit

2013-10-23 22:34:19 +11:00

fsl_booke_entry_mapping.S

powerpc/fsl-booke: Fix address issue when using relocatable kernels

2010-07-11 11:04:08 -05:00

ftrace.c

powerpc: Make ftrace endian-safe.

2013-10-11 16:53:26 +11:00

head_8xx.S

powerpc/8xx: Fixing issue with CONFIG_PIN_TLB

2013-10-28 21:11:21 -05:00

head_32.S

powerpc: Call do_page_fault() with interrupts off

2012-03-09 10:55:08 +11:00

head_40x.S

powerpc: Remove the empty giveup_fpu() function on 32bit kernel

2013-08-14 14:59:50 +10:00

head_44x.S

powerpc: Remove the empty giveup_fpu() function on 32bit kernel

2013-08-14 14:59:50 +10:00

head_64.S

powerpc: Fix alignment of secondary cpu spin vars

2013-12-30 14:02:34 +11:00

head_booke.h

powerpc: Fix interrupt range check on debug exception

2013-05-02 10:31:01 +10:00

head_fsl_booke.S

powerpc/fsl-booke: Use common defines for SPE/FP interrupts numbers

2013-10-16 18:49:44 -05:00

hw_breakpoint.c

powerpc/hw_brk: Fix off by one error when validating DAWR region end

2013-07-02 08:20:49 +10:00

ibmebus.c

PPC: ibmebus: convert bus code to use bus_groups

2013-09-26 15:49:42 -07:00

idle_6xx.S

powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly

2012-07-11 14:18:22 +10:00

idle_book3e.S

powerpc: Add paravirt idle loop for 64-bit Book-E

2013-03-13 14:19:36 -05:00

idle_e500.S

powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly

2012-07-11 14:18:22 +10:00

idle_power4.S

powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly

2012-07-11 14:18:22 +10:00

idle_power7.S

kvm: powerpc: book3s: Add a new config variable CONFIG_KVM_BOOK3S_HV_POSSIBLE

2013-10-17 15:18:28 +02:00

idle.c

powerpc/idle: Convert use of typedef ctl_table to struct ctl_table

2013-07-01 11:10:35 +10:00

io-workarounds.c

powerpc: Better split CONFIG_PPC_INDIRECT_PIO and CONFIG_PPC_INDIRECT_MMIO

2013-08-14 14:57:50 +10:00

io.c

powerpc/powernv: Add PIO accessors for Power8 LPC bus

2013-08-14 14:58:08 +10:00

iomap.c

powerpc: switch to GENERIC_PCI_IOMAP

2011-11-28 21:13:18 +02:00

iommu.c

powerpc/iommu: Use GFP_KERNEL instead of GFP_ATOMIC in iommu_init_table()

2013-10-03 17:24:44 +10:00

irq.c

Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-11-12 10:02:59 +09:00

isa-bridge.c

POWERPC: drivers: remove __dev* attributes.

2013-01-03 15:57:04 -08:00

jump_label.c

powerpc: Fix build breakage in jump_label.c

2011-11-16 14:25:19 +11:00

kgdb.c

powerpc/kgdb: use DEFINE_PER_CPU to allocate kgdb's thread_info

2013-10-18 18:38:10 -05:00

kprobes.c

doc: typo on word accounting in kprobes.c in mutliple architectures

2013-10-14 15:46:39 +02:00

kvm_emul.S

KVM: PPC: Not optimizing MSR_CE and MSR_ME with paravirt.

2012-05-30 11:43:11 +02:00

kvm.c

mm: enhance free_reserved_area() to support poisoning memory with zero

2013-07-03 16:07:32 -07:00

l2cr_6xx.S

Fix common misspellings

2011-03-31 11:26:23 -03:00

legacy_serial.c

powerpc/legacy_serial: Fix incorrect placement of __initdata tag

2013-10-11 16:48:59 +11:00

machine_kexec_32.c

treewide: convert uses of ATTRIB_NORETURN to __noreturn

2012-01-12 20:13:03 -08:00

machine_kexec_64.c

powerpc: Fix endian issues in kexec and crash dump code

2014-02-22 13:34:45 -08:00

machine_kexec.c

powerpc: Fix endian issues in kexec and crash dump code

2014-02-22 13:34:45 -08:00

Makefile

powerpc/pseries: Move lparcfg.c to platforms/pseries

2013-08-28 11:20:54 +10:00

misc_32.S

powerpc: Set the correct ksp_limit on ppc32 when switching to irq stack

2014-03-06 22:06:09 -08:00

misc_64.S

powerpc: Fix build break with PPC_EARLY_DEBUG_BOOTX=y

2013-12-10 11:25:03 +11:00

misc.S

powerpc: switch to generic sys_execve()/kernel_execve()

2012-09-30 23:35:51 -04:00

module_32.c

powerpc: Move local setup.h declarations to arch includes

2013-10-30 16:00:31 +11:00

module_64.c

powerpc: Move local setup.h declarations to arch includes

2013-10-30 16:00:31 +11:00

module.c

powerpc: Move local setup.h declarations to arch includes

2013-10-30 16:00:31 +11:00

msi.c

powerpc/PCI: include pci.h in powerpc MSI implementation

2009-03-25 08:54:29 -07:00

nvram_64.c

arch/powerpc/kernel: Use %12.12s instead of %12s to avoid memory overflow

2013-11-25 11:50:57 +11:00

of_platform.c

powerpc/eeh: Fix crash when adding a device in a slot with DDW

2013-01-10 17:01:58 +11:00

paca.c

powerpc: Fix section mismatch warning in free_lppacas

2013-10-11 16:49:26 +11:00

pci_32.c

powerpc/pci: Support per-aperture memory offset

2013-05-06 13:40:40 +10:00

pci_64.c

powerpc/pci: Don't use bitfield for force_32bit_msi

2013-08-14 11:50:25 +10:00

pci_dn.c

powerpc: Make PCI device node device tree accesses endian safe

2013-08-14 15:33:31 +10:00

pci_of_scan.c

powerpc: Fix little endian issue in OF PCI scan

2013-10-30 16:01:04 +11:00

pci-common.c

of/irq: simplify args to irq_create_of_mapping

2013-10-24 11:42:57 +01:00

pci-hotplug.c

powerpc/pci: Partial tree hotplug support

2013-07-24 14:18:48 +10:00

pmc.c

bug.h: add include of it to various implicit C users

2012-02-29 17:15:08 -05:00

ppc32.h

powerpc: switch to generic old sigaction()

2013-02-03 18:16:10 -05:00

ppc_ksyms.c

Merge branch 'for-kvm' into next

2013-10-11 18:23:53 +11:00

ppc_save_regs.S

Fix common misspellings

2011-03-31 11:26:23 -03:00

proc_powerpc.c

proc_powerpc: switch to fixed_size_llseek()

2013-06-29 12:57:50 +04:00

process.c

Merge tag 'signed-for-3.13' of git://github.com/agraf/linux-2.6 into kvm-master

2013-12-20 19:13:58 +01:00

prom_init_check.sh

powerpc/pmac: Early debug output on screen on 64-bit macs

2013-08-14 14:57:40 +10:00

prom_init.c

powerpc: Check return value of instance-to-package OF call

2014-01-13 09:49:17 +11:00

prom_parse.c

powerpc: of_parse_dma_window should take a __be32 *dma_window

2013-08-14 15:33:26 +10:00

prom.c

powerpc: Make cpu_to_chip_id() available when SMP=n

2013-11-21 10:33:44 +11:00

ptrace32.c

powerpc: move debug registers in a structure

2013-10-18 18:44:49 -05:00

ptrace.c

powerpc: PTRACE_PEEKUSR always returns FPR0

2013-12-13 15:48:33 +11:00

reloc_32.S

powerpc: Don't flush/invalidate the d/icache for an unknown relocation type

2013-07-01 11:10:34 +10:00

reloc_64.S

powerpc: Make the 64-bit kernel as a position-independent executable

2008-09-15 11:08:38 -07:00

rtas_flash.c

powerpc/rtas_flash: Fix validate_flash buffer overflow issue

2013-05-14 14:36:26 +10:00

rtas_pci.c

powerpc/kernel: Fix endian issue in rtas_pci

2013-10-11 16:50:22 +11:00

rtas-proc.c

powerpc: Move /proc/ppc64 to /proc/powerpc update

2010-01-15 13:26:17 +11:00

rtas-rtc.c

powerpc/rtas-rtc: remove sideeffects of printk_ratelimit

2011-06-29 15:30:43 +10:00

rtas.c

powerpc: Make RTAS calls endian safe

2013-08-14 15:33:22 +10:00

rtasd.c

powerpc/pseries: Add /proc interface to control topology updates

2013-04-26 16:08:26 +10:00

setup_32.c

powerpc: Move local setup.h declarations to arch includes

2013-10-30 16:00:31 +11:00

setup_64.c

powerpc: Move local setup.h declarations to arch includes

2013-10-30 16:00:31 +11:00

setup-common.c

powerpc: Fix endian issue in setup-common.c

2013-12-13 15:48:34 +11:00

signal_32.c

powerpc/signals: Improved mark VSX not saved with small contexts fix

2013-11-25 11:50:51 +11:00

signal_64.c

powerpc: Increase stack redzone for 64-bit userspace to 512 bytes

2014-03-06 22:06:20 -08:00

signal.c

powerpc/tm: Fix userspace stack corruption on signal delivery for active transactions

2013-06-01 08:29:23 +10:00

signal.h

powerpc/tm: Fix userspace stack corruption on signal delivery for active transactions

2013-06-01 08:29:23 +10:00

smp-tbsync.c

POWERPC: drivers: remove __dev* attributes.

2013-01-03 15:57:04 -08:00

smp.c

powerpc: Fix topology core_id endian issue on LE builds

2013-12-13 15:48:34 +11:00

stacktrace.c

powerpc: various straight conversions from module.h --> export.h

2011-10-31 19:30:44 -04:00

suspend.c

update email address

2010-07-19 10:56:54 +02:00

swsusp_32.S

Fix common misspellings

2011-03-31 11:26:23 -03:00

swsusp_64.c

Disintegrate asm/system.h for PowerPC

2012-03-28 18:30:02 +01:00

swsusp_asm64.S

powerpc: Only save/restore SDR1 if in hypervisor mode

2013-10-31 12:37:29 +11:00

swsusp_booke.S

powerpc/mpc85xx: invalidate TLB after hibernation resume

2013-07-30 15:50:08 -05:00

swsusp.c

Disintegrate asm/system.h for PowerPC

2012-03-28 18:30:02 +01:00

sys_ppc32.c

unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE

2013-05-09 13:46:38 -04:00

syscalls.c

powerpc: Fix personality handling in ppc64_personality()

2012-08-24 20:26:07 +10:00

sysfs.c

powerpc/sysfs: Disable writing to PURR in guest mode

2013-10-03 17:22:53 +10:00

systbl_chk.c

[POWERPC] Fix a couple of copyright symbols

2008-01-25 22:52:50 +11:00

systbl_chk.sh

[POWERPC] Fix a couple of copyright symbols

2008-01-25 22:52:50 +11:00

systbl.S

[POWERPC] Align the sys_call_table

2007-10-11 14:36:47 +10:00

tau_6xx.c

tree-wide: fix assorted typos all over the place

2009-12-04 15:39:55 +01:00

time.c

powerpc/pseries: Duplicate dtl entries sometimes sent to userspace

2013-11-21 10:33:39 +11:00

tm.S

powerpc: Use 32 bit loads and stores when operating on condition register values

2013-10-30 16:02:14 +11:00

traps.c

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2013-11-15 13:51:36 +09:00

udbg_16550.c

powerpc/wsp: Fix early debug build

2013-08-16 10:59:27 +10:00

udbg.c

powerpc: Add a configuration option for early BootX/OpenFirmware debug

2013-06-20 16:55:12 +10:00

uprobes.c

uretprobes/powerpc: Hijack return address

2013-04-13 15:31:56 +02:00

vdso.c

powerpc: Move local setup.h declarations to arch includes

2013-10-30 16:00:31 +11:00

vecemu.c

powerpc: Put FP/VSX and VR state into structures

2013-10-11 17:26:49 +11:00

vector.S

powerpc: Don't corrupt user registers on 32-bit

2013-10-23 22:34:19 +11:00

vio.c

powerpc/vio: Fix a dma_mask issue of vio

2013-11-21 10:33:43 +11:00

vmlinux.lds.S

powerpc/modules: Module CRC relocation fix causes perf issues

2013-07-24 14:18:43 +10:00