linux/arch/s390
Martin Schwidefsky fa968ee215 s390/signal: set correct address space control
If user space is running in primary mode it can switch to secondary
or access register mode, this is used e.g. in the clock_gettime code
of the vdso. If a signal is delivered to the user space process while
it has been running in access register mode the signal handler is
executed in access register mode as well which will result in a crash
most of the time.

Set the address space control bits in the PSW to the default for the
execution of the signal handler and make sure that the previous
address space control is restored on signal return. Take care
that user space can not switch to the kernel address space by
modifying the registers in the signal frame.

Cc: stable@vger.kernel.org
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-11-12 16:24:38 +01:00
..
appldata s390/vtimer: rework virtual timer interface 2012-07-20 11:15:08 +02:00
boot s390: fix linker script for 31 bit builds 2012-10-18 17:50:10 +02:00
crypto crypto: arch/s390 - cleanup - remove unneeded cra_list initialization 2012-08-01 17:47:29 +08:00
hypfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
include s390/signal: set correct address space control 2012-11-12 16:24:38 +01:00
kernel s390/signal: set correct address space control 2012-11-12 16:24:38 +01:00
kvm KVM updates for the 3.7 merge window 2012-10-04 09:30:33 -07:00
lib s390/mm: use pmd_large() instead of pmd_huge() 2012-10-26 16:44:23 +02:00
math-emu s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
mm s390/mm: use pmd_large() instead of pmd_huge() 2012-10-26 16:44:23 +02:00
net s390/bpf,jit: add support for BPF_S_ANC_ALU_XOR_X instruction 2012-09-26 15:45:28 +02:00
oprofile oprofile, s390: Fix uninitialized memory access when writing to oprofilefs 2012-08-27 14:49:23 +02:00
defconfig s390: update defconfig 2012-09-26 15:45:29 +02:00
Kbuild s390/bpf,jit: BPF Just In Time compiler for s390 2012-09-26 15:44:49 +02:00
Kconfig s390/thp: select HAVE_ARCH_TRANSPARENT_HUGEPAGE 2012-10-18 17:50:10 +02:00
Kconfig.debug s390/mm: add page table dumper 2012-10-09 14:16:58 +02:00
Makefile s390: Use generic init_task 2012-05-05 13:00:25 +02:00