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f5295bd8ea
linux/arch/powerpc/kernel
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Laurent Dufour f5295bd8ea powerpc/crashdump : Fix page frame number check in copy_oldmem_page 
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>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-02-28 18:06:25 +11:00
..
vdso32 powerpc: Use unstripped VDSO image for more accurate profiling data 2014-02-17 11:19:37 +11:00
vdso64 powerpc: Use unstripped VDSO image for more accurate profiling data 2014-02-17 11:19:37 +11:00
.gitignore
align.c powerpc: Enable Little Endian Alignment Handler for Float Pair Instructions 2013-10-30 16:01:23 +11:00
asm-offsets.c Second batch of KVM updates. Some minor x86 fixes, 2014-01-31 08:37:32 -08:00
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 2014-01-29 17:02:26 +11:00
cacheinfo.h
compat_audit.c
cpu_setup_6xx.S
cpu_setup_44x.S
cpu_setup_a2.S
cpu_setup_fsl_booke.S powerpc/85xx: add hardware automatically enter pw20 state 2014-01-07 19:40:28 -06:00
cpu_setup_pa6t.S
cpu_setup_power.S powerpc/book3s: Add flush_tlb operation in cpu_spec. 2013-12-05 16:04:38 +11:00
cpu_setup_ppc970.S
cputable.c powerpc/book3s: Flush SLB/TLBs if we get SLB/TLB machine check errors on power8. 2013-12-05 16:04:40 +11:00
crash_dump.c powerpc/crashdump : Fix page frame number check in copy_oldmem_page 2014-02-28 18:06:25 +11:00
crash.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
dbell.c powerpc: Add accounting for Doorbell interrupts 2013-04-18 15:59:55 +10:00
dma-iommu.c powerpc/iommu: Update the generic code to use dynamic iommu page sizes 2013-12-30 14:17:19 +11:00
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/powernv: Add iommu DMA bypass support for IODA2 2014-02-11 16:07:37 +11:00
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: Drop taken reference to driver on eeh_rmv_device 2014-02-11 11:24:46 +11:00
eeh_event.c powerpc/eeh: More accurate log 2013-11-21 10:33:36 +11:00
eeh_pe.c powerpc/eeh: Add restore_config operation 2014-01-15 13:46:46 +11:00
eeh_sysfs.c powerpc/eeh: Introdce flag to protect sysfs 2013-07-24 14:18:49 +10:00
eeh.c powerpc/eeh: Disable EEH on reboot 2014-02-17 11:19:39 +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: Don't corrupt transactional state when using FP/VMX in kernel 2014-01-15 13:59:11 +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: Replaced tlbilx with tlbwe in the initialization code 2014-01-10 17:34:04 -06:00
exceptions-64s.S powerpc: Fix "attempt to move .org backwards" error 2013-12-30 14:16:30 +11:00
fadump.c mm/ppc: use common help functions to free reserved pages 2013-04-29 15:54:30 -07:00
firmware.c
fpu.S powerpc: Don't corrupt transactional state when using FP/VMX in kernel 2014-01-15 13:59:11 +11:00
fsl_booke_entry_mapping.S powerpc: enable the relocatable support for the fsl booke 32bit kernel 2014-01-09 17:52:16 -06:00
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
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: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +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: smp support for booting a relocatable kernel above 64M 2014-01-09 17:52:18 -06:00
hw_breakpoint.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
ibmebus.c PPC: ibmebus: convert bus code to use bus_groups 2013-09-26 15:49:42 -07:00
idle_6xx.S
idle_book3e.S powerpc: Add paravirt idle loop for 64-bit Book-E 2013-03-13 14:19:36 -05:00
idle_e500.S
idle_power4.S
idle_power7.S powerpc/book3s: Return from interrupt if coming from evil context. 2013-12-05 16:04:36 +11:00
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: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
iommu.c powerpc/powernv: Add iommu DMA bypass support for IODA2 2014-02-11 16:07:37 +11:00
irq.c powerpc/ppc32: Fix the bug in the init of non-base exception stack for UP 2014-02-11 11:24:52 +11:00
isa-bridge.c POWERPC: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
jump_label.c
kgdb.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
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.c kvm/powerpc: rename kvm_hypercall() to epapr_hypercall() 2014-01-09 10:14:56 +01:00
l2cr_6xx.S
legacy_serial.c powerpc/legacy_serial: Fix incorrect placement of __initdata tag 2013-10-11 16:48:59 +11:00
machine_kexec_32.c
machine_kexec_64.c powerpc: Fix endian issues in kexec and crash dump code 2014-02-11 11:24:52 +11:00
machine_kexec.c powerpc: Fix endian issues in kexec and crash dump code 2014-02-11 11:24:52 +11:00
Makefile clk: mpc5xxx: switch to COMMON_CLK, retire PPC_CLOCK 2014-01-12 18:53:04 +01:00
mce_power.c powerpc: Fix endian issues in power7/8 machine check handler 2013-12-30 14:51:09 +11:00
mce.c Move precessing of MCE queued event out from syscall exit path. 2014-01-15 13:58:59 +11:00
misc_32.S powerpc: Set the correct ksp_limit on ppc32 when switching to irq stack 2014-02-17 11:19:34 +11:00
misc_64.S Merge branch 'merge' into next 2013-12-30 15:19:31 +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
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/e6500: TLB miss handler with hardware tablewalk support 2014-01-09 17:52:19 -06:00
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 PCI: Convert pcibios_resource_to_bus() to take a pci_bus, not a pci_dev 2013-12-21 10:06:10 -07:00
pci-common.c PCI: Convert pcibios_resource_to_bus() to take a pci_bus, not a pci_dev 2013-12-21 10:06:10 -07:00
pci-hotplug.c powerpc/pci: Partial tree hotplug support 2013-07-24 14:18:48 +10:00
pmc.c
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
proc_powerpc.c proc_powerpc: switch to fixed_size_llseek() 2013-06-29 12:57:50 +04:00
process.c powerpc: Fix hw breakpoints on !HAVE_HW_BREAKPOINT configurations 2014-01-29 16:58:47 +11:00
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: introduce early_get_first_memblock_info 2014-01-09 17:52:17 -06:00
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/relocate fix relocate processing in LE mode 2014-02-11 11:24:48 +11:00
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
rtas-rtc.c
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/ppc32: Fix the bug in the init of non-base exception stack for UP 2014-02-11 11:24:52 +11:00
setup_64.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-01-27 21:11:26 -08:00
setup-common.c powerpc: Fix endian issue in setup-common.c 2013-12-13 15:48:34 +11:00
signal_32.c powerpc: Fix 32-bit frames for signals delivered when transactional 2014-01-29 16:58:49 +11:00
signal_64.c powerpc: Don't corrupt transactional state when using FP/VMX in kernel 2014-01-15 13:59:11 +11:00
signal.c powerpc: Don't corrupt transactional state when using FP/VMX in kernel 2014-01-15 13:59:11 +11:00
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: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
smp.c Merge branch 'merge' into next 2013-12-30 15:19:31 +11:00
stacktrace.c
suspend.c
swsusp_32.S
swsusp_64.c
swsusp_asm64.S powerpc: Only save/restore SDR1 if in hypervisor mode 2013-10-31 12:37:29 +11:00
swsusp_booke.S powerpc/fsl-booke: Use SPRN_SPRGn rather than mfsprg/mtsprg 2014-01-07 19:06:03 -06:00
swsusp.c
sys_ppc32.c unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE 2013-05-09 13:46:38 -04:00
syscalls.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
sysfs.c powerpc/pseries/cpuidle: smt-snooze-delay cleanup. 2014-01-29 17:02:24 +11:00
systbl_chk.c
systbl_chk.sh
systbl.S
tau_6xx.c
time.c powerpc: Fix races with irq_work 2014-01-15 13:59:03 +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 powerpc: Fix transactional FP/VMX/VSX unavailable handlers 2014-01-15 13:59:14 +11:00
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 uprobes/powerpc: Kill arch_uprobe->ainsn 2013-11-20 16:31:01 +01:00
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 transactional state when using FP/VMX in kernel 2014-01-15 13:59:11 +11:00
vio.c powerpc/iommu: Update the generic code to use dynamic iommu page sizes 2013-12-30 14:17:19 +11:00
vmlinux.lds.S powerpc/modules: Module CRC relocation fix causes perf issues 2013-07-24 14:18:43 +10:00