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
..
native	ia64/pv_ops: paravirtualize gate.S.	2009-03-26 11:01:46 -07:00
sn	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
uv	sgi-gru: add macros for using the UV hub to send interrupts	2009-04-02 19:05:05 -07:00
xen	xen: Remove unnecessary arch specific xen irq functions.	2010-02-18 17:17:58 -08:00
Kbuild	archs: replace unifdef-y with header-y	2010-08-14 22:26:51 +02:00
acpi-ext.h	ACPI: remove private acpica headers from driver files	2008-12-31 01:15:22 -05:00
acpi.h	ACPI: delete the "acpi=ht" boot option	2010-03-14 20:58:38 -04:00
agp.h	agp: kill phys_to_gart() and gart_to_phys()	2009-08-03 09:05:00 +01:00
asm-offsets.h	kbuild: move asm-offsets.h to include/generated	2009-12-12 13:08:14 +01:00
asmmacro.h	Rename .data..patch.XXX to .data..patch.XXX.	2010-03-03 11:25:59 +01:00
atomic.h	[IA64] Fix 64-bit atomic routines to return "long"	2010-08-13 16:41:07 -07:00
auxvec.h	…
bitops.h	bitops: Optimize hweight() by making use of compile-time evaluation	2010-04-06 15:52:11 -07:00
bitsperlong.h	asm-generic: introduce asm/bitsperlong.h	2009-06-11 21:02:14 +02:00
break.h	ia64/xen: reserve "break" numbers used for xen hypercalls.	2008-10-17 09:52:52 -07:00
bug.h	…
bugs.h	…
byteorder.h	byteorder: make swab.h include asm/swab.h like a regular header	2009-01-14 19:56:50 -08:00
cache.h	Rename .data.read_mostly to .data..read_mostly.	2010-03-03 11:26:00 +01:00
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
checksum.h	…
compat.h	compat: Make compat_alloc_user_space() incorporate the access_ok()	2010-09-14 16:08:45 -07:00
cpu.h	…
cputime.h	cputime: Optimize jiffies_to_cputime(1)	2009-08-03 14:48:36 +02:00
current.h	…
cyclone.h	…
delay.h	…
device.h	Driver Core: Add platform device arch data V3	2009-07-22 00:28:38 +02:00
div64.h	…
dma-mapping.h	dma-mapping: remove dma_is_consistent API	2010-08-11 08:59:21 -07:00
dma.h	…
dmi.h	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
elf.h	elf coredump: replace ELF_CORE_EXTRA_* macros by functions	2010-03-06 11:26:45 -08:00
emergency-restart.h	…
errno.h	…
esi.h	…
fb.h	…
fcntl.h	…
fpswa.h	…
fpu.h	Revert "Neither asm/types.h nor linux/types.h is required for arch/ia64/include/asm/fpu.h"	2009-07-17 06:35:05 -07:00
ftrace.h	[IA64] sanity in #include files. Move fnptr to types.h	2010-01-06 15:52:35 -08:00
futex.h	…
gcc_intrin.h	[IA64] Convert ia64 to use int-ll64.h	2009-06-17 09:33:49 -07:00
hardirq.h	preempt-count: force hardirq-count to max of 10	2009-02-12 11:19:05 -05:00
hpsim.h	…
hugetlb.h	…
hw_irq.h	[IA64] preallocate IA64_IRQ_MOVE_VECTOR	2009-12-14 16:03:36 -08:00
ia64regs.h	…
idle.h	[IA64] xen_domu_defconfig: fix build issues/warnings	2009-05-05 11:43:13 -07:00
intel_intrin.h	…
intrinsics.h	Pull pvops into release branch	2009-03-31 14:25:08 -07:00
io.h	implement early_io{re,un}map for ia64	2009-12-16 02:45:10 +00:00
ioctl.h	…
ioctls.h	tty: Add EXTPROC support for LINEMODE	2010-08-10 13:47:39 -07:00
iommu.h	intel-iommu: Fix one last ia64 build problem in Pass Through Support	2009-06-05 20:49:53 +01:00
iosapic.h	…
ipcbuf.h	…
irq.h	ia64: move nr-irqs.h to include/generated	2009-12-12 13:08:14 +01:00
irq_regs.h	…
kdebug.h	…
kexec.h	kexec jump: rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE	2008-08-15 08:35:42 -07:00
kmap_types.h	kmap_types: make most arches use generic header file	2009-06-16 19:47:51 -07:00
kprobes.h	[IA64] sanity in #include files. Move fnptr to types.h	2010-01-06 15:52:35 -08:00
kregs.h	[IA64] Fix annoying IA64_TR_ALLOC_MAX message.	2008-10-17 13:47:53 -07:00
kvm.h	KVM: Maintain back mapping from irqchip/pin to gsi	2009-12-03 09:32:07 +02:00
kvm_host.h	KVM: Remove unnecessary divide operations	2010-08-01 10:47:30 +03:00
kvm_para.h	KVM: Add __KERNEL__ guards to exported headers	2009-09-10 10:46:48 +03:00
libata-portmap.h	…
linkage.h	…
local.h	…
local64.h	arch: Implement local64_t	2010-06-09 11:12:36 +02:00
machvec.h	Merge branch 'linus' into core/iommu	2009-01-16 10:09:10 +01:00
machvec_dig.h	…
machvec_dig_vtd.h	remove dma operations in struct ia64_machine_vector	2009-01-06 14:06:50 +01:00
machvec_hpsim.h	…
machvec_hpzx1.h	remove dma operations in struct ia64_machine_vector	2009-01-06 14:06:50 +01:00
machvec_hpzx1_swiotlb.h	remove hwsw_dma_ops	2009-01-06 14:06:52 +01:00
machvec_init.h	[IA64] SN specific version of dma_get_required_mask()	2009-01-15 10:42:16 -08:00
machvec_sn2.h	Merge branch 'linus' into core/iommu	2009-01-16 10:09:10 +01:00
machvec_uv.h	…
machvec_xen.h	ia64/xen: define xen machine vector for domU.	2008-10-17 10:08:56 -07:00
mc146818rtc.h	…
mca.h	[IA64] Save I-resources to ia64_sal_os_state	2009-12-14 16:37:58 -08:00
mca_asm.h	…
meminit.h	ia64: don't alias VMALLOC_END to vmalloc_end	2009-10-02 13:28:55 +09:00
mman.h	mm: remove duplicate asm/mman.h files	2009-09-22 07:17:42 -07:00
mmu.h	…
mmu_context.h	cpumask: use mm_cpumask() wrapper: ia64	2009-03-16 14:12:48 +10:30
mmzone.h	[IA64] removing redundant ifdef	2010-05-18 14:45:52 -07:00
module.h	ia64/pv_ops/bp/module: support binary patching for kernel module.	2009-03-26 11:02:51 -07:00
msgbuf.h	…
msidef.h	ia64: Move the macro definitions related to MSI to one header file.	2009-03-24 11:03:12 +02:00
mutex.h	…
nodedata.h	…
numa.h	hugetlb: add generic definition of NUMA_NO_NODE	2009-12-15 08:53:12 -08:00
page.h	[IA64] increase ia64 static per cpu area	2010-07-27 14:55:12 -07:00
pal.h	[IA64] Convert ia64 to use int-ll64.h	2009-06-17 09:33:49 -07:00
param.h	…
paravirt.h	ia64/pv_ops: implement binary patching optimization for native.	2009-03-26 11:02:42 -07:00
paravirt_patch.h	ia64/pv_op/binarypatch: add helper functions to support binary patching for paravirt_ops.	2009-03-26 11:02:31 -07:00
paravirt_privop.h	[IA64] fix allmodconfig compilation breakage.	2009-04-20 09:46:29 -07:00
parport.h	…
patch.h	…
pci.h	pci-dma: add linux/pci-dma.h to linux/pci.h	2010-03-12 15:52:42 -08:00
percpu.h	Merge branch 'for-35' of git://repo.or.cz/linux-kbuild	2010-06-01 08:55:52 -07:00
perfmon.h	…
perfmon_default_smpl.h	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
pgalloc.h	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
pgtable.h	MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself	2010-02-20 16:41:46 +00:00
poll.h	…
posix_types.h	…
processor.h	[IA64] Remove COMPAT_IA32 support	2010-02-08 10:42:17 -08:00
ptrace.h	ptrace: move user_enable_single_step & co prototypes to linux/ptrace.h	2010-03-12 15:52:38 -08:00
ptrace_offsets.h	…
pvclock-abi.h	ia64/xen: add a necessary header file to compile include/xen/interface/xen.h	2008-10-17 09:57:28 -07:00
resource.h	…
rse.h	…
rwsem.h	[IA64] Fix rwsem: RWSEM_WAITING_BIAS must not be unsigned.	2010-08-12 09:14:56 -07:00
sal.h	[IA64] Convert ia64 to use int-ll64.h	2009-06-17 09:33:49 -07:00
scatterlist.h	remove needless ISA_DMA_THRESHOLD	2010-08-07 18:15:50 +02:00
sections.h	[IA64] Put the space for cpu0 per-cpu area into .data section	2008-09-29 16:39:19 -07:00
segment.h	…
sembuf.h	…
serial.h	…
setup.h	…
shmbuf.h	…
shmparam.h	…
sigcontext.h	…
siginfo.h	signals: demultiplexing SIGTRAP signal	2008-09-23 13:26:52 +02:00
signal.h	asm-generic: rename termios.h, signal.h and mman.h	2009-06-11 21:01:52 +02:00
smp.h	cpumask: remove arch_send_call_function_ipi	2009-09-24 09:34:47 +09:30
socket.h	net: Generalize socket rx gap / receive queue overflow cmsg	2009-10-12 13:26:31 -07:00
sockios.h	…
sparsemem.h	…
spinlock.h	locking: Convert raw_rwlock functions to arch_rwlock	2009-12-14 23:55:32 +01:00
spinlock_types.h	locking: Convert raw_rwlock to arch_rwlock	2009-12-14 23:55:32 +01:00
stat.h	…
statfs.h	IA64: Use <asm-generic/statfs.h>	2008-09-04 09:46:13 +01:00
string.h	…
swab.h	headers_check fix: ia64, swab.h	2009-02-01 11:01:25 +05:30
swiotlb.h	swiotlb: Remove duplicate swiotlb_force extern declarations	2009-11-15 09:03:10 +01:00
sync_bitops.h	ia64/xen: introduce sync bitops which is necessary for ia64/xen support.	2008-10-17 09:53:33 -07:00
syscall.h	[IA64] Remove COMPAT_IA32 support	2010-02-08 10:42:17 -08:00
system.h	[IA64] Remove COMPAT_IA32 support	2010-02-08 10:42:17 -08:00
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
timex.h	ia64/pv_ops/pv_time_ops: add sched_clock hook.	2009-03-26 10:50:42 -07:00
tlb.h	[IA64] __per_cpu_idtrs[] is a memory hog	2010-01-07 16:10:57 -08:00
tlbflush.h	…
topology.h	numa: ia64: use generic percpu var numa_node_id() implementation	2010-05-27 09:12:57 -07:00
types.h	[IA64] move fnptr definition inside #ifdef __KERNEL__	2010-01-08 10:53:28 -08:00
uaccess.h	…
ucontext.h	…
unaligned.h	…
uncached.h	…
unistd.h	[IA64] Fix build error: conflicting types for ‘sys_execve’	2010-08-18 10:17:44 -07:00
unwind.h	…
user.h	…
ustack.h	…
vga.h	…
xor.h	…