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
..
airq.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
appldata.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
asm-offsets.h	kbuild: move asm-offsets.h to include/generated	2009-12-12 13:08:14 +01:00
atomic.h	[S390] atomic: implement atomic64_dec_if_positive	2010-05-26 23:26:29 +02:00
auxvec.h	[S390] introduce vdso on s390	2008-12-25 13:38:55 +01:00
bitops.h	[S390] use inline assembly contraints available with gcc 3.3.3	2010-02-26 22:37:30 +01:00
bitsperlong.h	asm-generic: introduce asm/bitsperlong.h	2009-06-11 21:02:14 +02:00
bug.h	panic: Allow warnings to set different taint flags	2010-05-19 08:36:48 +01:00
bugs.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
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
ccwdev.h	[S390] cio: CHSC SIOSL Support	2010-08-09 18:12:53 +02:00
ccwgroup.h	[S390] pm: ccwgroup bus power management callbacks	2009-06-16 10:31:08 +02:00
checksum.h	[S390] convert/optimize csum_fold() to C	2009-09-11 10:29:43 +02:00
chpid.h	[S390] types: add/fix types.h include in header files	2009-01-09 12:15:06 +01:00
chsc.h	[S390] cio: move scsw helper functions to header file	2009-09-11 10:29:36 +02:00
cio.h	tree-wide: Assorted spelling fixes	2010-02-09 11:13:56 +01:00
cmb.h	[S390] types: add/fix types.h include in header files	2009-01-09 12:15:06 +01:00
compat.h	compat: Make compat_alloc_user_space() incorporate the access_ok()	2010-09-14 16:08:45 -07:00
cpcmd.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
cpu.h	[S390] Get rid of cpuid.h header file.	2009-09-11 10:29:56 +02:00
cputime.h	[S390] idle time accounting vs. machine checks	2010-05-17 10:00:15 +02:00
crw.h	[S390] cio: wait for channel report	2010-02-26 22:37:29 +01:00
current.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
dasd.h	[S390] dasd: add large volume support	2009-03-26 15:24:05 +01:00
debug.h	[S390] s390dbf: Add description for usage of "%s" in sprintf events	2009-09-11 10:29:53 +02:00
delay.h	[S390] Provide arch specific mdelay implementation.	2009-10-06 10:35:08 +02:00
device.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
diag.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
div64.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
dma.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
ebcdic.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
elf.h	elf: kill USE_ELF_CORE_DUMP	2009-12-16 07:20:12 -08:00
emergency-restart.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
errno.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
etr.h	[S390] use inline assembly contraints available with gcc 3.3.3	2010-02-26 22:37:30 +01:00
extmem.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
fb.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
fcntl.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
fcx.h	[S390] cio: update sac values	2008-12-25 13:39:06 +01:00
ftrace.h	[S390] ftrace: add function graph tracer support	2009-06-12 10:27:39 +02:00
futex.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
hardirq.h	[S390] remove unused irq_cpustat_t defintion	2009-09-11 10:29:48 +02:00
hugetlb.h	[S390] fix tlb flushing vs. concurrent /proc accesses	2010-08-24 09:26:34 +02:00
idals.h	[S390] dasd: add High Performance FICON support	2009-03-26 15:24:05 +01:00
io.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
ioctl.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
ioctls.h	tty: Add EXTPROC support for LINEMODE	2010-08-10 13:47:39 -07:00
ipcbuf.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
ipl.h	[S390] kernel: Append scpdata to kernel boot command line	2009-09-11 10:29:46 +02:00
irq_regs.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
irq.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
irqflags.h	[S390] use inline assembly contraints available with gcc 3.3.3	2010-02-26 22:37:30 +01:00
isc.h	[S390] zcrypt: Use of Thin Interrupts	2008-12-25 13:38:57 +01:00
itcw.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
Kbuild	archs: replace unifdef-y with header-y	2010-08-14 22:26:51 +02:00
kdebug.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
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	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +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
kvm_virtio.h	[S390] kvm: use console_initcall() to initialize s390 virtio console	2009-09-11 10:29:52 +02:00
kvm.h	KVM: s390: Make psw available on all exits, not just a subset	2009-12-03 09:32:25 +02:00
linkage.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
local64.h	arch: Implement local64_t	2010-06-09 11:12:36 +02:00
local.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
lowcore.h	[S390] virtualization aware cpu measurement	2010-05-17 10:00:15 +02:00
mathemu.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
mman.h	mm: remove duplicate asm/mman.h files	2009-09-22 07:17:42 -07:00
mmu_context.h	[S390] fix tlb flushing vs. concurrent /proc accesses	2010-08-24 09:26:34 +02:00
mmu.h	[S390] fix tlb flushing vs. concurrent /proc accesses	2010-08-24 09:26:34 +02:00
module.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
monwriter.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
msgbuf.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
mutex.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
nmi.h	[S390] split/move machine check handler code	2009-03-26 15:24:10 +01:00
page.h	[S390] cio: fix storage key handling	2010-02-26 22:37:30 +01:00
param.h	[S390] Have param.h simply include <asm-generic/param.h>.	2010-01-04 09:05:58 +01:00
pci.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
percpu.h	s390: switch to dynamic percpu allocator	2009-06-24 15:13:53 +09:00
perf_event.h	perf: Do the big rename: Performance Counters -> Performance Events	2009-09-21 14:28:04 +02:00
pgalloc.h	[S390] Improve address space mode selection.	2009-12-07 12:51:33 +01:00
pgtable.h	[S390] fix tlb flushing vs. concurrent /proc accesses	2010-08-24 09:26:34 +02:00
poll.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
posix_types.h	[S390] asm-s390/posix_types.h: drop __USE_ALL usage	2009-01-09 12:15:04 +01:00
processor.h	[S390] use inline assembly contraints available with gcc 3.3.3	2010-02-26 22:37:30 +01:00
ptrace.h	[S390] add breaking event address for user space	2010-05-17 10:00:15 +02:00
qdio.h	[SCSI] zfcp: Enable data division support for FCP devices	2010-07-28 09:48:55 -05:00
qeth.h	[S390] types: add/fix types.h include in header files	2009-01-09 12:15:06 +01:00
reset.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
resource.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
rwsem.h	[S390] use inline assembly contraints available with gcc 3.3.3	2010-02-26 22:37:30 +01:00
s390_ext.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
scatterlist.h	remove needless ISA_DMA_THRESHOLD	2010-08-07 18:15:50 +02:00
schid.h	[S390] types: add/fix types.h include in header files	2009-01-09 12:15:06 +01:00
sclp.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
scsw.h	[S390] cio: move scsw helper functions to header file	2009-09-11 10:29:36 +02:00
seccomp.h	[S390] secure computing arch backend	2009-06-12 10:27:31 +02:00
sections.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
segment.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
sembuf.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
setup.h	[S390] virtualization aware cpu measurement	2010-05-17 10:00:15 +02:00
sfp-machine.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
sfp-util.h	Revert "endian: #define __BYTE_ORDER"	2010-05-26 08:30:15 -07:00
shmbuf.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
shmparam.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
sigcontext.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
siginfo.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
signal.h	asm-generic: rename termios.h, signal.h and mman.h	2009-06-11 21:01:52 +02:00
sigp.h	[S390] spinlock: check virtual cpu running status	2010-02-26 22:37:31 +01:00
smp.h	[S390] spinlock: check virtual cpu running status	2010-02-26 22:37:31 +01:00
socket.h	net: Generalize socket rx gap / receive queue overflow cmsg	2009-10-12 13:26:31 -07:00
sockios.h	[S390] use generic sockios.h header file	2009-12-07 12:51:37 +01:00
sparsemem.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
spinlock_types.h	locking: Convert raw_rwlock to arch_rwlock	2009-12-14 23:55:32 +01:00
spinlock.h	[S390] use inline assembly contraints available with gcc 3.3.3	2010-02-26 22:37:30 +01:00
stat.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
statfs.h	add f_flags to struct statfs(64)	2010-08-09 16:48:44 -04:00
string.h	[S390] use compiler builtin versions of strlen/strcpy/strcat	2009-03-26 15:24:24 +01:00
suspend.h	[S390] s390: hibernation support for s390	2009-06-16 10:31:22 +02:00
swab.h	[S390] use inline assembly contraints available with gcc 3.3.3	2010-02-26 22:37:30 +01:00
syscall.h	tracing: Unify arch_syscall_addr() implementations	2010-02-17 13:07:21 +01:00
sysinfo.h	[S390] sysinfo: fix SYSIB 3,2,2 structure	2010-02-26 22:37:31 +01:00
system.h	[S390] improve irq tracing code in entry[64].S	2010-05-17 10:00:15 +02:00
tape390.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
termbits.h	[S390] use generic termbits.h header file	2009-12-07 12:51:37 +01:00
termios.h	asm-generic: rename termios.h, signal.h and mman.h	2009-06-11 21:01:52 +02:00
thread_info.h	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2010-05-20 09:20:59 -07:00
timer.h	[S390] extend virtual timer interface by mod_virt_timer_periodic	2009-04-14 15:37:23 +02:00
timex.h	[S390] s390_hypfs: Add new attributes	2010-05-17 10:00:17 +02:00
tlb.h	[S390] fix tlb flushing vs. concurrent /proc accesses	2010-08-24 09:26:34 +02:00
tlbflush.h	[S390] fix tlb flushing vs. concurrent /proc accesses	2010-08-24 09:26:34 +02:00
topology.h	[S390] topology: use default MC domain initializer	2010-08-09 18:12:54 +02:00
types.h	asm-generic: introduce asm/bitsperlong.h	2009-06-11 21:02:14 +02:00
uaccess.h	[S390] uaccess: implement strict user copy checks	2010-02-26 22:37:29 +01:00
ucontext.h	[S390] 64-bit register support for 31-bit processes	2009-10-06 10:35:10 +02:00
unaligned.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
unistd.h	[S390] wire up prlimit64 and fanotify* syscalls	2010-08-13 10:06:54 +02:00
user.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
vdso.h	[S390] vdso: use ntp adjusted clock multiplier	2010-04-22 17:17:19 +02:00
vtoc.h	[S390] dasd: add large volume support	2009-03-26 15:24:05 +01:00
xor.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00
zcrypt.h	[S390] move include/asm-s390 to arch/s390/include/asm	2008-08-01 20:42:05 +02:00