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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
..
boot	Merge branch 'master' into for-next	15 years ago
configs	defconfig reduction	15 years ago
include/asm	compat: Make compat_alloc_user_space() incorporate the access_ok()	15 years ago
kernel	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6	15 years ago
lib	sparc64: Make lock backoff really a NOP on UP builds.	15 years ago
math-emu	Revert "endian: #define __BYTE_ORDER"	15 years ago
mm	kmap_atomic: make kunmap_atomic() harder to misuse	15 years ago
oprofile	…
prom	sparc64: Get rid of indirect p1275 PROM call buffer.	15 years ago
Kconfig	Merge branch 'timers-timekeeping-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	15 years ago
Kconfig.debug	sparc: Kill user copy check code.	15 years ago
Makefile	…