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