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H. Peter Anvin c41d68a513 compat: Make compat_alloc_user_space() incorporate the access_ok() 
compat_alloc_user_space() expects the caller to independently call
access_ok() to verify the returned area.  A missing call could
introduce problems on some architectures.

This patch incorporates the access_ok() check into
compat_alloc_user_space() and also adds a sanity check on the length.
The existing compat_alloc_user_space() implementations are renamed
arch_compat_alloc_user_space() and are used as part of the
implementation of the new global function.

This patch assumes NULL will cause __get_user()/__put_user() to either
fail or access userspace on all architectures.  This should be
followed by checking the return value of compat_access_user_space()
for NULL in the callers, at which time the access_ok() in the callers
can also be removed.

Reported-by: Ben Hawkes <hawkes@sota.gen.nz>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: James Bottomley <jejb@parisc-linux.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: <stable@kernel.org>
2010-09-14 16:08:45 -07:00
..
iseries
8xx_immap.h
8253pit.h time: move PIT_TICK_RATE to linux/timex.h 2009-06-16 19:47:27 -07:00
abs_addr.h Merge commit 'gcl/next' into next 2010-08-04 10:26:03 +10:00
agp.h agp: kill phys_to_gart() and gart_to_phys() 2009-08-03 09:05:00 +01:00
asm-compat.h powerpc: Emulate most Book I instructions in emulate_step() 2010-06-22 19:40:29 +10:00
asm-offsets.h kbuild: move asm-offsets.h to include/generated 2009-12-12 13:08:14 +01:00
async_tx.h ppc440spe-adma: adds updated ppc440spe adma driver 2009-12-11 21:24:44 -07:00
atomic.h powerpc: Rename LWSYNC_ON_SMP to PPC_RELEASE_BARRIER, ISYNC_ON_SMP to PPC_ACQUIRE_BARRIER 2010-02-17 14:03:15 +11:00
auxvec.h
backlight.h
bitops.h powerpc: Rename LWSYNC_ON_SMP to PPC_RELEASE_BARRIER, ISYNC_ON_SMP to PPC_ACQUIRE_BARRIER 2010-02-17 14:03:15 +11:00
bitsperlong.h
bootx.h
btext.h
bug.h panic: Allow warnings to set different taint flags 2010-05-19 08:36:48 +01:00
bugs.h
byteorder.h
cache.h Merge branch 'for-35' of git://repo.or.cz/linux-kbuild 2010-06-01 08:55:52 -07:00
cacheflush.h block: add helpers to run flush_dcache_page() against a bio and a request's pages 2009-11-26 09:16:19 +01:00
cell-pmu.h
cell-regs.h powerpc/cell: Move CBE_IOPTE_* to <asm/cell-regs.h> 2009-08-20 10:29:26 +10:00
checksum.h
clk_interface.h
code-patching.h
compat.h compat: Make compat_alloc_user_space() incorporate the access_ok() 2010-09-14 16:08:45 -07:00
cpm.h powerpc/cpm: Reintroduce global spi_pram struct (fixes build issue) 2010-07-11 11:03:22 -05:00
cpm1.h powerpc/cpm1: Mark micropatch code/data static and __init 2010-07-11 11:04:06 -05:00
cpm2.h powerpc/cpm: Move CPMFCR_* defines into cpm.h 2009-11-11 21:43:19 -06:00
cputable.h Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-08-06 09:39:22 -07:00
cputhreads.h powerpc/mm: Add HW threads support to no_hash TLB management 2009-08-20 10:12:37 +10:00
cputime.h powerpc: Replace per_cpu(, smp_processor_id()) with __get_cpu_var() 2010-02-03 17:39:48 +11:00
current.h
dbdma.h
dbell.h powerpc/book3e: Resend doorbell exceptions to ourself 2010-07-09 16:11:19 +10:00
dcr-generic.h
dcr-mmio.h
dcr-native.h
dcr-regs.h ppc440spe-adma: adds updated ppc440spe adma driver 2009-12-11 21:24:44 -07:00
dcr.h
delay.h powerpc: Fix spin_event_timeout() to be robust over context switches 2009-07-08 13:50:24 +10:00
device.h arch/powerpc: Move dma_mask from of_device into pdev_archdata 2010-05-22 00:10:40 -06:00
disassemble.h
div64.h
dma-mapping.h dma-mapping: remove dma_is_consistent API 2010-08-11 08:59:21 -07:00
dma.h
edac.h
eeh.h
eeh_event.h
elf.h powerpc: TIF_ABI_PENDING bit removal 2010-02-01 14:00:30 +11:00
emergency-restart.h
emulated_ops.h powerpc: perf_event: Add alignment-faults and emulation-faults software events 2009-10-28 16:13:03 +11:00
errno.h
exception-64e.h powerpc/book3e-64: Add helper function to setup IVORs 2009-08-28 14:24:13 +10:00
exception-64s.h Make head_64.S aware of KVM real mode code 2009-11-05 16:49:57 +11:00
fb.h
fcntl.h
feature-fixups.h powerpc: Fix lwsync feature fixup vs. modules on 64-bit 2010-02-26 18:29:17 +11:00
firmware.h powerpc: Fix hypervisor TLB batching 2009-10-14 16:58:37 +11:00
fixmap.h powerpc: reserve fixmap entries for early debug 2009-12-12 22:24:30 -07:00
floppy.h
fs_pd.h
fsl_gtm.h
fsl_lbc.h powerpc/fsl: Increase the number of possible localbus banks 2009-06-15 21:45:32 -05:00
fsldma.h arch/powerpc/include/asm/fsldma.h needs slab.h 2010-09-09 18:57:24 -07:00
ftrace.h
futex.h powerpc: Rename LWSYNC_ON_SMP to PPC_RELEASE_BARRIER, ISYNC_ON_SMP to PPC_ACQUIRE_BARRIER 2010-02-17 14:03:15 +11:00
gpio.h powerpc/gpio: support gpio_to_irq() 2009-12-10 20:08:15 -06:00
grackle.h
hardirq.h powerpc: Convert global "BAD" interrupt to per cpu spurious 2010-02-17 14:02:49 +11:00
heathrow.h
highmem.h kmap_atomic: make kunmap_atomic() harder to misuse 2010-08-09 20:44:54 -07:00
hugetlb.h powerpc/mm: Bring hugepage PTE accessor functions back into sync with normal accessors 2009-10-30 17:21:23 +11:00
hvcall.h powerpc/pseries: Migration code reorganization / hibernation prep 2010-07-09 11:26:17 +10:00
hvconsole.h
hvcserver.h
hw_breakpoint.h powerpc, hw_breakpoint: Tell generic code we have no instruction breakpoints 2010-06-30 13:54:58 +10:00
hw_irq.h powerpc/perf_event: Fix oops due to perf_event_do_pending call 2010-05-12 14:34:00 +10:00
hydra.h
i8259.h
ibmebus.h
ide.h
immap_86xx.h
immap_cpm2.h powerpc/qe&cpm2: Avoid redefinitions in CPM2 and QE headers 2009-11-11 21:43:18 -06:00
immap_qe.h powerpc/qe&cpm2: Avoid redefinitions in CPM2 and QE headers 2009-11-11 21:43:18 -06:00
io-defs.h
io.h
ioctl.h
ioctls.h tty: Add EXTPROC support for LINEMODE 2010-08-10 13:47:39 -07:00
iommu.h powerpc: Change archdata dma_data to a union 2009-09-24 15:31:43 +10:00
ipcbuf.h
ipic.h
irq.h Merge commit 'v2.6.35-rc6' into devicetree/next 2010-07-24 09:49:13 -06:00
irq_regs.h
irqflags.h
Kbuild archs: replace unifdef-y with header-y 2010-08-14 22:26:51 +02:00
kdebug.h
kdump.h powerpc: Move kdump default base address to 64MB on 64bit 2010-06-15 15:02:32 +10:00
kexec.h powerpc/kexec: Fix boundary case for book-e kexec memory limits 2010-07-22 13:31:14 -05:00
keylargo.h
kgdb.h
kmap_types.h kdb: core for kgdb back end (2 of 2) 2010-05-20 21:04:21 -05:00
kprobes.h
kvm.h KVM: PPC: Allow userspace to unset the IRQ line 2010-05-17 12:16:51 +03:00
kvm_44x.h
kvm_asm.h KVM: PPC: Enable native paired singles 2010-05-17 12:19:08 +03:00
kvm_book3s.h KVM: PPC: Make use of hash based Shadow MMU 2010-08-01 10:47:28 +03:00
kvm_book3s_32.h KVM: PPC: Add kvm_book3s_32.h 2010-05-17 12:18:23 +03:00
kvm_book3s_64.h KVM: PPC: Add kvm_book3s_64.h 2010-05-17 12:18:21 +03:00
kvm_book3s_asm.h KVM: PPC: Use KVM_BOOK3S_HANDLER 2010-05-17 12:18:28 +03:00
kvm_booke.h KVM: PPC: Improve indirect svcpu accessors 2010-05-17 12:18:26 +03:00
kvm_e500.h KVM: PPC E500: fix tlbcfg emulation 2010-03-01 12:36:06 -03:00
kvm_fpu.h KVM: PPC: elide struct thread_struct instances from stack 2010-08-01 10:39:24 +03:00
kvm_host.h KVM: Remove unnecessary divide operations 2010-08-01 10:47:30 +03:00
kvm_para.h
kvm_ppc.h KVM: PPC: Extract MMU init 2010-05-17 12:18:34 +03:00
libata-portmap.h
linkage.h
local.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2010-03-03 07:34:18 -08:00
local64.h arch: Implement local64_t 2010-06-09 11:12:36 +02:00
lppaca.h powerpc/pseries: Add extended_cede_processor() helper function. 2009-11-24 14:33:03 +11:00
lv1call.h
machdep.h powerpc/book3e: Add generic 64-bit idle powersave support 2010-07-14 14:13:18 +10:00
macio.h of/device: Replace of_device with platform_device in includes and core code 2010-07-24 09:58:21 -06:00
mc146818rtc.h
mediabay.h powerpc/macio: Rework hotplug media bay support 2009-12-09 17:09:14 +11:00
memblock.h lmb: rename to memblock 2010-07-14 17:14:00 +10:00
mman.h mm: add MAP_HUGETLB for mmaping pseudo-anonymous huge page regions 2009-09-22 07:17:41 -07:00
mmu-8xx.h powerpc: Add TLB management code for 64-bit Book3E 2009-08-20 10:25:09 +10:00
mmu-40x.h powerpc: Add TLB management code for 64-bit Book3E 2009-08-20 10:25:09 +10:00
mmu-44x.h powerpc/47x: Base ppc476 support 2010-05-05 09:11:10 -04:00
mmu-book3e.h powerpc/book3e: Adjust the page sizes list based on MMU config 2010-07-14 14:13:53 +10:00
mmu-hash32.h powerpc: Name xpn & x fields in HW Hash PTE format 2009-08-28 14:24:12 +10:00
mmu-hash64.h powerpc/mm: Fix vsid_scrample typo 2010-08-24 15:26:27 +10:00
mmu.h powerpc/47x: Base ppc476 support 2010-05-05 09:11:10 -04:00
mmu_context.h PPC: Split context init/destroy functions 2010-05-17 12:18:20 +03:00
mmzone.h powerpc/cpumask: Convert NUMA code to new cpumask API 2010-05-06 17:41:58 +10:00
module.h module: handle ppc64 relocating kcrctabs when CONFIG_RELOCATABLE=y 2009-12-15 16:28:34 +10:30
mpc5xxx.h powerpc/5xxx: Add common mpc5xxx_get_bus_frequency() function 2009-06-17 00:30:22 -06:00
mpc6xx.h
mpc8xx.h
mpc52xx.h powerpc/5200: add mpc5200_psc_ac97_gpio_reset 2010-08-06 20:49:18 -06:00
mpc52xx_psc.h powerpc/5200: add mpc5200_psc_ac97_gpio_reset 2010-08-06 20:49:18 -06:00
mpc5121.h powerpc/5121: shared DIU framebuffer support 2010-08-01 17:06:44 -06:00
mpc8260.h
mpic.h powerpc/cpumask: Convert mpic driver to new cpumask API 2010-05-06 18:01:46 +10:00
msgbuf.h
msi_bitmap.h
mutex.h powerpc: Rename LWSYNC_ON_SMP to PPC_RELEASE_BARRIER, ISYNC_ON_SMP to PPC_ACQUIRE_BARRIER 2010-02-17 14:03:15 +11:00
nvram.h powerpc/nvram_64: Remove unused code 2009-10-30 17:21:28 +11:00
ohare.h
oprofile_impl.h
paca.h powerpc/kexec: Switch to a static PACA on the way out 2010-07-31 14:56:30 +10:00
page.h powerpc/fsl-booke: Fix CONFIG_RELOCATABLE support on FSL Book-E ppc32 2010-04-26 17:54:15 -05:00
page_32.h dma-mapping: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN 2010-08-11 08:59:21 -07:00
page_64.h powerpc: remove unused __page_aligned definition. 2010-03-03 11:25:58 +01:00
param.h powerpc: Simplify param.h by including <asm-generic/param.h> 2010-02-03 17:39:48 +11:00
parport.h powerpc: Correct parport interrupt parsing 2010-05-06 16:49:26 +10:00
pasemi_dma.h
pci-bridge.h of/address: merge of_address_to_resource() 2010-07-05 16:14:26 -06:00
pci.h pci-dma: add linux/pci-dma.h to linux/pci.h 2010-03-12 15:52:42 -08:00
percpu.h powerpc: Optimise per cpu accesses on 64bit 2010-07-09 11:28:30 +10:00
perf_event.h perf: Drop the skip argument from perf_arch_fetch_regs_caller 2010-06-08 23:31:27 +02:00
perf_event_fsl_emb.h powerpc/perf: e500 support 2010-03-05 03:04:08 -06:00
perf_event_server.h powerpc/perf: e500 support 2010-03-05 03:04:08 -06:00
pgalloc-32.h powerpc/mm: Cleanup management of kmem_caches for pagetables 2009-10-30 17:20:57 +11:00
pgalloc-64.h powerpc/mm: Track backing pages allocated by vmemmap_populate() 2010-05-06 16:49:27 +10:00
pgalloc.h powerpc/mm: Cleanup management of kmem_caches for pagetables 2009-10-30 17:20:57 +11:00
pgtable-ppc32.h powerpc/ppc32: Fixup pmd_page to work when ARCH_PFN_OFFSET is non-zero 2010-04-07 18:00:30 +10:00
pgtable-ppc64-4k.h
pgtable-ppc64-64k.h powerpc/mm: Fix misplaced #endif in pgtable-ppc64-64k.h 2009-08-20 10:12:35 +10:00
pgtable-ppc64.h powerpc/mm: Allow more flexible layouts for hugepage pagetables 2009-10-30 17:20:58 +11:00
pgtable.h MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself 2010-02-20 16:41:46 +00:00
phyp_dump.h
pmac_feature.h powerpc: Convert feature_lock to raw_spinlock 2010-02-19 14:52:32 +11:00
pmac_low_i2c.h i2c-powermac: Include the i2c_adapter in struct pmac_i2c_bus 2009-12-06 17:06:19 +01:00
pmac_pfunc.h
pmc.h powerpc/pmc: Don't access lppaca on Book3E 2009-09-24 15:31:39 +10:00
pmi.h
poll.h
posix_types.h
ppc-opcode.h powerpc: Emulate most Book I instructions in emulate_step() 2010-06-22 19:40:29 +10:00
ppc-pci.h powerpc/eeh: Fix a bug when pci structure is null 2010-02-17 14:02:47 +11:00
ppc4xx.h
ppc_asm.h powerpc: Adjust base and index registers in Altivec macros 2009-08-28 14:24:12 +10:00
processor.h powerpc, hw_breakpoints: Implement hw_breakpoints for 64-bit server processors 2010-06-22 19:40:50 +10:00
prom.h of/address: Clean up function declarations 2010-08-01 01:42:42 -06:00
ps3.h ps3: Replace direct file operations by callback 2009-06-15 16:47:26 +10:00
ps3av.h
ps3fb.h
ps3gpu.h ps3fb: Tear down FB setup during cleanup 2009-06-15 13:26:21 +10:00
ps3stor.h
pSeries_reconfig.h powerpc/pseries: Kernel DLPAR Infrastructure 2009-12-09 17:09:32 +11:00
pte-8xx.h powerpc/8xx: Restore _PAGE_WRITETHRU 2009-12-09 17:10:37 +11:00
pte-40x.h powerpc/mm: Fix 40x and 8xx vs. _PAGE_SPECIAL 2009-09-24 15:31:49 +10:00
pte-44x.h powerpc/mm: Cleanup handling of execute permission 2009-08-27 13:12:51 +10:00
pte-book3e.h powerpc/fsl-booke: Use HW PTE format if CONFIG_PTE_64BIT 2009-09-02 16:20:41 +10:00
pte-common.h powerpc/mm: Fix 40x and 8xx vs. _PAGE_SPECIAL 2009-09-24 15:31:49 +10:00
pte-fsl-booke.h powerpc/fsl-booke: Use HW PTE format if CONFIG_PTE_64BIT 2009-09-02 16:20:41 +10:00
pte-hash32.h powerpc/mm: Cleanup handling of execute permission 2009-08-27 13:12:51 +10:00
pte-hash64-4k.h
pte-hash64-64k.h powerpc/mm: Fix pgtable cache cleanup with CONFIG_PPC_SUBPAGE_PROT 2009-12-08 15:59:33 +11:00
pte-hash64.h
ptrace.h powerpc: Fix userspace build of ptrace.h 2010-07-08 18:11:46 +10:00
qe.h powerpc/qe&cpm: Implement static inline stubs for non-QE/CPM builds 2009-11-11 21:43:20 -06:00
qe_ic.h
reg.h powerpc: Inline ppc64_runlatch_off 2010-08-24 15:26:30 +10:00
reg_8xx.h
reg_booke.h powerpc/book3e: Adjust the page sizes list based on MMU config 2010-07-14 14:13:53 +10:00
reg_fsl_emb.h powerpc/perf: e500 support 2010-03-05 03:04:08 -06:00
resource.h
rheap.h
rio.h
rtas.h powerpc/pseries: Rename RAS_VECTOR_OFFSET to RTAS_VECTOR_EXTERNAL_INTERRUPT and move to rtas.h 2010-07-09 11:28:31 +10:00
rtc.h
rwsem.h powerpc: Make rwsem use "long" type 2010-08-24 14:41:48 +10:00
scatterlist.h remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
seccomp.h
sections.h
sembuf.h
serial.h
setjmp.h
setup.h powerpc: derive COMMAND_LINE_SIZE from asm-generic 2009-08-28 14:24:16 +10:00
sfp-machine.h Revert "endian: #define __BYTE_ORDER" 2010-05-26 08:30:15 -07:00
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h
smp.h powerpc/cpumask: Dynamically allocate cpu_sibling_map and cpu_core_map cpumasks 2010-05-06 17:41:56 +10:00
smu.h of: kill struct of_device 2010-06-28 12:41:33 -07:00
socket.h net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
sockios.h
sparsemem.h Revert "powerpc/mm: Bump SECTION_SIZE_BITS from 16MB to 256MB" 2010-04-13 13:54:39 +10:00
spinlock.h powerpc: Rename LWSYNC_ON_SMP to PPC_RELEASE_BARRIER, ISYNC_ON_SMP to PPC_ACQUIRE_BARRIER 2010-02-17 14:03:15 +11:00
spinlock_types.h locking: Convert raw_rwlock to arch_rwlock 2009-12-14 23:55:32 +01:00
spu.h
spu_csa.h
spu_info.h
spu_priv1.h
sstep.h
stat.h
statfs.h
string.h
suspend.h
swab.h
swiotlb.h powerpc: use dma_map_ops struct 2009-08-28 14:24:10 +10:00
synch.h powerpc: Use lwsync for acquire barrier if CPU supports it 2010-02-17 14:03:16 +11:00
syscall.h powerpc: Use correct ccr bit for syscall error status 2010-03-19 16:38:16 +11:00
syscalls.h improve sys_newuname() for compat architectures 2010-03-12 15:52:32 -08:00
systbl.h powerpc: Wire up fanotify_init, fanotify_mark, prlimit64 syscalls 2010-08-24 15:28:28 +10:00
system.h net: NET_SKB_PAD should depend on L1_CACHE_BYTES 2010-06-15 18:16:43 -07:00
tce.h
termbits.h tty: Add EXTPROC support for LINEMODE 2010-08-10 13:47:39 -07:00
termios.h
thread_info.h add descriptive comment for TIF_MEMDIE task flag declaration. 2010-05-14 11:13:27 +02:00
time.h powerpc: Clean up obsolete code relating to decrementer and timebase 2010-07-09 11:26:16 +10:00
timex.h
tlb.h powerpc/mm: Rework & cleanup page table freeing code path 2009-08-20 10:24:56 +10:00
tlbflush.h powerpc/mm: Make low level TLB flush ops on BookE take additional args 2009-08-20 10:12:41 +10:00
topology.h Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-05 15:57:35 -07:00
trace.h powerpc: tracing: Give hypervisor call tracepoints access to arguments 2009-10-28 16:13:04 +11:00
tsi108.h
tsi108_irq.h
tsi108_pci.h
types.h
uaccess.h
ucc.h
ucc_fast.h
ucc_slow.h
ucontext.h
udbg.h powerpc: gamecube/wii: early debugging using usbgecko 2009-12-12 22:24:31 -07:00
uic.h
unaligned.h
uninorth.h
unistd.h powerpc: Wire up fanotify_init, fanotify_mark, prlimit64 syscalls 2010-08-24 15:28:28 +10:00
user.h
vdso.h powerpc: Move 64bit VDSO to improve context switch performance 2009-08-20 10:12:24 +10:00
vdso_datapage.h powerpc: Rework VDSO gettimeofday to prevent time going backwards 2010-07-09 11:26:16 +10:00
vga.h
vio.h
xilinx_intc.h
xilinx_pci.h
xmon.h
xor.h