Milton Miller 3d2cea732d powerpc/kexec: Fix memory corruption from unallocated slaves ...

Commit 1fc711f7ff (powerpc/kexec: Fix race
in kexec shutdown) moved the write to signal the cpu had exited the kernel
from before the transition to real mode in kexec_smp_wait to kexec_wait.

Unfornately it missed that kexec_wait is used both by cpus leaving the
kernel and by secondary slave cpus that were not allocated a paca for
what ever reason -- they could be beyond nr_cpus or not described in
the current device tree for whatever reason (for example, kexec-load
was not refreshed after a cpu hotplug operation).  Cpus coming through
that path they will write to paca[NR_CPUS] which is beyond the space
allocated for the paca data and overwrite memory not allocated to pacas
but very likely still real mode accessable).

Move the write back to kexec_smp_wait, which is used only by cpus that
found their paca, but after the transition to real mode.

Signed-off-by: Milton Miller <miltonm@bga.com>
Cc: <stable@kernel.org> # (1fc711f was backported to 2.6.32)
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2011-05-19 14:30:43 +10:00

..

vdso32

Fix common misspellings

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

vdso64

Fix common misspellings

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

.gitignore

powerpc: Ignore generated vmlinux.lds in git

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

align.c

powerpc: Remove fpscr use from [kvm_]cvt_{fd,df}

2010-09-02 14:07:32 +10:00

asm-offsets.c

powerpc: Per process DSCR + some fixes (try#4)

2011-04-27 14:18:19 +10:00

audit.c

…

btext.c

Fix common misspellings

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

cacheinfo.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

cacheinfo.h

powerpc: Rewrite sysfs processor cache info code

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

clock.c

…

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: Add A2 cpu support

2011-04-27 13:02:02 +10:00

cpu_setup_fsl_booke.S

rapidio: modify configuration to support PCI-SRIO controller

2011-03-23 19:46:42 -07:00

cpu_setup_pa6t.S

…

cpu_setup_power7.S

powerpc: Initialize TLB and LPID register on HV mode Power7

2011-04-20 11:03:24 +10:00

cpu_setup_ppc970.S

powerpc: Use LOAD_REG_IMMEDIATE only for constants on 64-bit

2008-09-15 11:08:35 -07:00

cputable.c

powerpc: Free up some CPU feature bits by moving out MMU-related features

2011-04-27 14:18:52 +10:00

crash_dump.c

crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn

2011-03-23 19:47:19 -07:00

crash.c

powerpc/kexec: Fix build failure on 32-bit SMP

2011-05-04 15:22:59 +10:00

dbell.c

powerpc/book3e: Resend doorbell exceptions to ourself

2010-07-09 16:11:19 +10:00

dma-iommu.c

powerpc/iommu: Use coherent_dma_mask for alloc_coherent

2010-12-09 15:17:50 +11:00

dma-swiotlb.c

of: Merge of_platform_bus_type with platform_bus_type

2010-07-24 09:57:51 -06:00

dma.c

powerpc: Implement dma_mmap_coherent()

2011-03-30 10:44:00 +11:00

e500-pmu.c

perf, arch: Cleanup perf-pmu init vs lockup-detector

2010-11-26 15:14:56 +01:00

entry_32.S

powerpc/ppc32/tracing: Add stack frame to calls of trace_hardirqs_on/off

2011-01-21 14:08:33 +11:00

entry_64.S

powerpc: Free up some CPU feature bits by moving out MMU-related features

2011-04-27 14:18:52 +10:00

exceptions-64e.S

powerpc: Add early debug for WSP platforms

2011-05-06 13:32:41 +10:00

exceptions-64s.S

powerpc: Improve scheduling of system call entry instructions

2011-05-19 14:30:42 +10:00

firmware.c

powerpc: Make powerpc_firmware_features __read_mostly

2010-02-09 13:56:07 +11:00

fpu.S

powerpc: Remove second definition of STACK_FRAME_OVERHEAD

2010-11-29 15:48:23 +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

Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-20 10:56:46 -07:00

head_8xx.S

powerpc: Remove second definition of STACK_FRAME_OVERHEAD

2010-11-29 15:48:23 +11:00

head_32.S

powerpc/smp: soft-replugged CPUs must go back to start_secondary

2011-04-01 15:37:09 +11:00

head_40x.S

Fix common misspellings

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

head_44x.S

Fix common misspellings

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

head_64.S

powerpc: Use MSR_64BIT in places

2011-04-27 14:18:44 +10:00

head_booke.h

powerpc/booke: Add Stack Marking support to Booke Exception Prolog

2010-05-05 08:01:52 -04:00

head_fsl_booke.S

Fix common misspellings

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

hw_breakpoint.c

powerpc, hw_breakpoint: Tell generic code we have no instruction breakpoints

2010-06-30 13:54:58 +10:00

ibmebus.c

PM / Hibernate: Introduce CONFIG_HIBERNATE_CALLBACKS

2011-04-11 22:54:42 +02:00

idle_6xx.S

powerpc: Fix for getting CPU number in power_save_ppc32_restore()

2008-09-03 20:53:47 +10:00

idle_book3e.S

powerpc/book3e: Add generic 64-bit idle powersave support

2010-07-14 14:13:18 +10:00

idle_e500.S

powerpc: Fix for getting CPU number in power_save_ppc32_restore()

2008-09-03 20:53:47 +10:00

idle_power4.S

powerpc/pmac/smp: Properly NAP offlined CPU on G5

2011-04-01 15:37:25 +11:00

idle_power7.S

powerpc: Add NAP mode support on Power7 in HV mode

2011-04-20 11:03:24 +10:00

idle.c

powerpc: Re-enable preemption before cpu_die()

2010-08-24 15:26:29 +10:00

init_task.c

Use new __init_task_data macro in arch init_task.c files.

2009-09-21 06:27:08 +02:00

io-workarounds.c

powerpc/pci: Properly initialize IO workaround "private"

2011-04-27 14:18:33 +10:00

io.c

powerpc: tiny memcpy_(to|from)io optimisation

2009-11-04 16:43:12 -07:00

iomap.c

…

iommu.c

powerpc: iommu: Add device name to iommu error printks

2010-12-09 15:35:32 +11:00

irq.c

powerpc/irq: Stop exporting irq_map

2011-05-04 15:02:15 +10:00

isa-bridge.c

[POWERPC] Remove leftover printk in isa-bridge.c

2008-05-09 20:22:59 +10:00

kgdb.c

kgdb,ppc: Fix regression in evr register handling

2010-11-17 13:54:58 -06:00

kprobes.c

powerpc/kprobes: Remove resume_execution() in kprobes

2010-06-02 17:50:37 +10:00

kvm_emul.S

KVM: PPC: Make PV mtmsrd L=1 work with r30 and r31

2010-10-24 10:52:14 +02:00

kvm.c

PPC: KVM: Book E doesn't have __end_interrupts.

2010-11-05 14:42:27 -02:00

l2cr_6xx.S

Fix common misspellings

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

legacy_serial.c

powerpc: Check device status before adding serial device

2011-04-12 06:29:21 -05:00

lparcfg.c

powerpc/pseries: Add page coalescing support

2011-05-04 16:02:21 +10:00

machine_kexec_32.c

powerpc/kexec: make masking/disabling interrupts generic

2010-10-14 00:52:46 -05:00

machine_kexec_64.c

powerpc/kexec: Fix orphaned offline CPUs across kexec

2010-07-31 15:05:22 +10:00

machine_kexec.c

powerpc: Convert to new irq_* function names

2011-03-29 14:48:12 +02:00

Makefile

powerpc: Remove unused config in the Makefile

2011-05-19 14:30:40 +10:00

misc_32.S

powerpc: Remove second definition of STACK_FRAME_OVERHEAD

2010-11-29 15:48:23 +11:00

misc_64.S

powerpc/kexec: Fix memory corruption from unallocated slaves

2011-05-19 14:30:43 +10:00

misc.S

powerpc: Remove unneeded cpu_setup/restore from POWER7 cputable entry

2010-11-29 15:48:22 +11:00

module_32.c

powerpc/ppc32: ftrace, dynamic ftrace to handle modules

2008-11-20 10:52:53 -08:00

module_64.c

powerpc: Unify opcode definitions and support

2009-02-23 10:48:56 +11:00

module.c

powerpc: remove unused variable

2010-10-05 17:27:54 -07:00

mpc7450-pmu.c

perf, arch: Cleanup perf-pmu init vs lockup-detector

2010-11-26 15:14:56 +01:00

msi.c

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

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

nvram_64.c

powerpc/nvram: Generalize code for OS partitions in NVRAM

2011-03-04 18:19:04 +11:00

of_platform.c

dt/powerpc: Eliminate users of of_platform_{,un}register_driver

2011-02-28 01:36:39 -07:00

paca.c

powerpc: In HV mode, use HSPRG0 for PACA

2011-04-20 11:03:22 +10:00

pci_32.c

powerpc/pci: Make both ppc32 and ppc64 use sysdata for pci_controller

2011-02-04 11:46:51 -07:00

pci_64.c

powerpc/pci: Make both ppc32 and ppc64 use sysdata for pci_controller

2011-02-04 11:46:51 -07:00

pci_dn.c

powerpc/pci: Fix crash in PCI code on ppc64 when matching device nodes

2011-03-21 10:57:57 +11:00

pci_of_scan.c

powerpc/pci: Make both ppc32 and ppc64 use sysdata for pci_controller

2011-02-04 11:46:51 -07:00

pci-common.c

powerpc: Convert to new irq_* function names

2011-03-29 14:48:12 +02:00

perf_callchain.c

perf: Factorize callchain context handling

2010-08-19 01:32:11 +02:00

perf_event_fsl_emb.c

powerpc, perf: Fix frequency calculation for overflowing counters (FSL version)

2011-01-19 20:05:42 +01:00

perf_event.c

powerpc/perf_event: Skip updating kernel counters if register value shrinks

2011-04-18 13:08:23 +10:00

pmc.c

powerpc: Convert pmc_owner_lock to raw_spinlock

2010-02-19 14:52:33 +11:00

power4-pmu.c

perf, arch: Cleanup perf-pmu init vs lockup-detector

2010-11-26 15:14:56 +01:00

power5-pmu.c

perf, arch: Cleanup perf-pmu init vs lockup-detector

2010-11-26 15:14:56 +01:00

power5+-pmu.c

perf, arch: Cleanup perf-pmu init vs lockup-detector

2010-11-26 15:14:56 +01:00

power6-pmu.c

perf, arch: Cleanup perf-pmu init vs lockup-detector

2010-11-26 15:14:56 +01:00

power7-pmu.c

perf, arch: Cleanup perf-pmu init vs lockup-detector

2010-11-26 15:14:56 +01:00

ppc32.h

powerpc: Add VSX context save/restore, ptrace and signal support

2008-07-01 11:28:50 +10:00

ppc970-pmu.c

perf, arch: Cleanup perf-pmu init vs lockup-detector

2010-11-26 15:14:56 +01:00

ppc_ksyms.c

powerpc: Simplify 4k/64k copy_page logic

2011-05-19 14:30:42 +10:00

ppc_save_regs.S

Fix common misspellings

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

proc_powerpc.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

process.c

powerpc: Free up some CPU feature bits by moving out MMU-related features

2011-04-27 14:18:52 +10:00

prom_init_check.sh

powerpc: Fix compile errors in prom_init_check for gcc 4.5

2010-07-08 18:11:39 +10:00

prom_init.c

powerpc/pseries: Add page coalescing support

2011-05-04 16:02:21 +10:00

prom_parse.c

of/pci: move of_irq_map_pci() into generic code

2011-02-04 11:46:50 -07:00

prom.c

powerpc: Free up some CPU feature bits by moving out MMU-related features

2011-04-27 14:18:52 +10:00

ptrace32.c

powerpc: Update compat_arch_ptrace

2010-12-09 15:35:32 +11:00

ptrace.c

Fix common misspellings

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

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: Use simple_read_from_buffer

2011-01-21 14:08:34 +11:00

rtas_pci.c

powerpc/pci: Clean up direct access to sysdata by RTAS

2009-05-21 15:44:23 +10:00

rtas-proc.c

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

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

rtas-rtc.c

…

rtas.c

powerpc/pseries: Add page coalescing support

2011-05-04 16:02:21 +10:00

rtasd.c

Fix common misspellings

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

setup_32.c

powerpc: Properly handshake CPUs going out of boot spin loop

2011-04-20 11:03:24 +10:00

setup_64.c

powerpc: Rename slb0_limit() to safe_stack_limit() and add Book3E support

2011-05-06 13:32:24 +10:00

setup-common.c

powerpc: Convert old cpumask API into new one

2011-05-04 15:22:59 +10:00

setup.h

…

signal_32.c

powerpc: fix double syscall restarts

2010-09-22 09:33:50 -07:00

signal_64.c

powerpc: Use MSR_64BIT in places

2011-04-27 14:18:44 +10:00

signal.c

powerpc: fix double syscall restarts

2010-09-22 09:33:50 -07:00

signal.h

powerpc: Sanitize stack pointer in signal handling code

2009-03-27 16:58:24 +11:00

smp-tbsync.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

smp.c

powerpc: Convert old cpumask API into new one

2011-05-04 15:22:59 +10:00

softemu8xx.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

stacktrace.c

powerpc: Removed duplicated include in stacktrace.c

2008-07-28 16:30:47 +10:00

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

…

swsusp_asm64.S

powerpc: Fix 64-bit hibernation with 64k pages

2008-10-07 14:26:20 +11:00

swsusp_booke.S

powerpc/fsl-booke: Add hibernation support for FSL BookE processors

2010-05-21 07:41:53 -05:00

swsusp.c

powerpc/mm: Split mmu_context handling

2008-12-21 14:21:15 +11:00

sys_ppc32.c

BKL: remove extraneous #include <smp_lock.h>

2010-11-17 08:59:32 -08:00

syscalls.c

Add generic sys_olduname()

2010-03-12 15:52:32 -08:00

sysfs.c

powerpc: Per process DSCR + some fixes (try#4)

2011-04-27 14:18:19 +10:00

systbl_chk.c

…

systbl_chk.sh

…

systbl.S

…

tau_6xx.c

tree-wide: fix assorted typos all over the place

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

time.c

powerpc: Fix oops if scan_dispatch_log is called too early

2011-04-18 13:08:19 +10:00

traps.c

powerpc: Convert old cpumask API into new one

2011-05-04 15:22:59 +10:00

udbg_16550.c

powerpc: Add early debug for WSP platforms

2011-05-06 13:32:41 +10:00

udbg.c

powerpc: Add early debug for WSP platforms

2011-05-06 13:32:41 +10:00

vdso.c

mm: arch: rename in_gate_area_no_task to in_gate_area_no_mm

2011-03-23 16:36:55 -04:00

vecemu.c

…

vector.S

powerpc: Remove static branch hint in giveup_altivec

2011-05-19 14:30:42 +10:00

vio.c

powerpc/iommu: Use coherent_dma_mask for alloc_coherent

2010-12-09 15:17:50 +11:00

vmlinux.lds.S

percpu: align percpu readmostly subsection to cacheline

2011-01-25 14:26:50 +01:00