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Will Deacon c168870704 arm64: ptrace: change fs when passing kernel pointer to regset code 
Our compat PTRACE_POKEUSR implementation simply passes the user data to
regset_copy_from_user after some simple range checking. Unfortunately,
the data in question has already been copied to the kernel stack by this
point, so the subsequent access_ok check fails and the ptrace request
returns -EFAULT. This causes problems tracing fork() with older versions
of strace.

This patch briefly changes the fs to KERNEL_DS, so that the access_ok
check passes even with a kernel address.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 		2014-06-18 12:40:57 +01:00
..
alpha Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
arc Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
arm arm/ftrace: fix ftrace_return_addr() to ftrace_return_address() 2014-06-18 12:40:55 +01:00
arm64 arm64: ptrace: change fs when passing kernel pointer to regset code 2014-06-18 12:40:57 +01:00
avr32 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next 2014-06-03 12:57:53 -07:00
blackfin blackfin updates for Linux 3.16 2014-06-12 20:08:47 -07:00
c6x DeviceTree for 3.16: 2014-06-04 10:02:38 -07:00
cris cris: update comments for generic idle conversion 2014-06-06 16:08:18 -07:00
frv sys_sgetmask/sys_ssetmask: add CONFIG_SGETMASK_SYSCALL 2014-06-04 16:54:14 -07:00
hexagon Hexagon: Delete stale barrier.h 2014-05-01 10:09:47 -07:00
ia64 Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
m32r arch,m32r: Convert smp_mb__*() 2014-04-18 14:20:36 +02:00
m68k Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
metag Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
microblaze Microblaze patches for 3.16-rc1 2014-06-05 16:15:33 -07:00
mips Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
mn10300 sys_sgetmask/sys_ssetmask: add CONFIG_SGETMASK_SYSCALL 2014-06-04 16:54:14 -07:00
openrisc DeviceTree for 3.16: 2014-06-04 10:02:38 -07:00
parisc Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
powerpc Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2014-06-12 21:23:38 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
score arch,score: Convert smp_mb__*() 2014-04-18 14:20:43 +02:00
sh Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
sparc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
tile Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
um Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2014-06-12 21:23:38 -07:00
unicore32 arch/unicore32/mm/ioremap.c: return NULL on invalid pfn 2014-06-04 16:53:53 -07:00
x86 Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-06-14 14:46:29 -07:00
xtensa Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
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