Mike Qiu 140ab6452c powerpc/PCI: Fix NULL dereference in sys_pciconfig_iobase() list traversal ...

3bc955987f ("powerpc/PCI: Use list_for_each_entry() for bus traversal")
caused a NULL pointer dereference because the loop body set the iterator to
NULL:

  Unable to handle kernel paging request for data at address 0x00000000
  Faulting instruction address: 0xc000000000041d78
  Oops: Kernel access of bad area, sig: 11 [#1]
  ...
  NIP [c000000000041d78] .sys_pciconfig_iobase+0x68/0x1f0
  LR [c000000000041e0c] .sys_pciconfig_iobase+0xfc/0x1f0
  Call Trace:
  [c0000003b4787db0] [c000000000041e0c] .sys_pciconfig_iobase+0xfc/0x1f0 (unreliable)
  [c0000003b4787e30] [c000000000009ed8] syscall_exit+0x0/0x98

Fix it by using a temporary variable for the iterator.

[bhelgaas: changelog, drop tmp_bus initialization]
Fixes: 3bc955987f powerpc/PCI: Use list_for_each_entry() for bus traversal
Signed-off-by: Mike Qiu <qiudayu@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

2014-04-14 16:33:49 -06:00

..

vdso32

powerpc/booke64: Use SPRG7 for VDSO

2014-03-19 19:57:14 -05:00

vdso64

powerpc/booke64: Use SPRG7 for VDSO

2014-03-19 19:57:14 -05:00

.gitignore

…

align.c

powerpc: Add lq/stq emulation

2014-04-09 12:53:28 +10:00

asm-offsets.c

powerpc/booke64: Use SPRG7 for VDSO

2014-03-19 19:57:14 -05:00

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/pseries: Update dynamic cache nodes for suspend/resume operation

2014-03-07 15:54:49 +11:00

cacheinfo.h

…

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 hardware automatically enter pw20 state

2014-01-07 19:40:28 -06:00

cpu_setup_pa6t.S

…

cpu_setup_power.S

powerpc/ppc64: Do not turn AIL (reloc-on interrupts) too early

2014-04-07 10:33:15 +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

powerpc: Add a cpu feature CPU_FTR_PMAO_BUG

2014-03-24 09:48:24 +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: Fixup the brown paperbag fallout of the "cleanup"

2014-03-05 00:13:33 +01:00

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/booke64: Critical and machine check exception support

2014-03-19 19:57:27 -05:00

exceptions-64s.S

powerpc: Remove dead code in sycall entry

2014-04-09 12:53:11 +10:00

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 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

Merge tag 'trace-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2014-04-03 10:26:31 -07:00

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: 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

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

powerpc/powernv: Add OPAL call to resync timebase on wakeup

2014-03-05 15:56:54 +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: Irq: Use generic_handle_irq

2014-03-04 17:37:52 +01:00

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

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

kvm.c

kvm/powerpc: rename kvm_hypercall() to epapr_hypercall()

2014-01-09 10:14:56 +01:00

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

2014-02-11 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/book3s: Recover from MC in sapphire on SCOM read via MMIO.

2014-03-07 15:52:10 +11:00

mce.c

powerpc/book3s: Recover from MC in sapphire on SCOM read via MMIO.

2014-03-07 15:52:10 +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/ppc64: Gracefully handle early interrupts

2014-04-07 10:33:15 +10:00

pci_32.c

powerpc/pci: Support per-aperture memory offset

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

pci_64.c

powerpc/PCI: Fix NULL dereference in sys_pciconfig_iobase() list traversal

2014-04-14 16:33:49 -06:00

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

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

powerpc/tm: Disable IRQ in tm_recheckpoint

2014-04-07 10:33:13 +10:00

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/prom: early_init_dt_scan_cpus() updates cpu features only once

2014-04-07 10:33:14 +10:00

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: Align p_dyn, p_rela and p_st symbols

2014-03-07 13:50:19 +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

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/le: Enable RTAS events support

2014-04-07 10:33:12 +10:00

rtasd.c

powerpc/le: Enable RTAS events support

2014-04-07 10:33:12 +10:00

setup_32.c

powerpc: Make boot_cpuid common between 32 and 64-bit

2014-04-07 10:33:14 +10:00

setup_64.c

powerpc: Don't try to set LPCR unless we're in hypervisor mode

2014-04-12 17:58:48 -07:00

setup-common.c

powerpc: Make boot_cpuid common between 32 and 64-bit

2014-04-07 10:33:14 +10:00

signal_32.c

powerpc/tm: Disable IRQ in tm_recheckpoint

2014-04-07 10:33:13 +10:00

signal_64.c

powerpc/tm: Disable IRQ in tm_recheckpoint

2014-04-07 10:33:13 +10:00

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

powerpc: Implement tick broadcast IPI as a fixed IPI message

2014-03-05 15:55:04 +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/fsl-booke: Use SPRN_SPRGn rather than mfsprg/mtsprg

2014-01-07 19:06:03 -06:00

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: Delete non-required instances of include <linux/init.h>

2014-01-15 13:46:44 +11:00

sysfs.c

powerpc, sysfs: Fix CPU hotplug callback registration

2014-03-20 13:43:42 +01:00

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

cpuidle/powernv: Add "Fast-Sleep" CPU idle state

2014-03-05 15:57:04 +11:00

tm.S

powerpc/tm: Disable IRQ in tm_recheckpoint

2014-04-07 10:33:13 +10:00

traps.c

powerpc: Add lq/stq emulation

2014-04-09 12:53:28 +10:00

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/booke64: Use SPRG7 for VDSO

2014-03-19 19:57:14 -05:00

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: Revert c6102609 and replace it with the correct fix for vio dma mask setting

2014-03-07 15:50:12 +11:00

vmlinux.lds.S

powerpc/modules: Module CRC relocation fix causes perf issues

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