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8a5d8473dd
linux/arch/s390/kernel
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Heiko Carstens 8a5d8473dd s390/maccess: remove potentially broken probe_kernel_write() 
Remove the s390 architecture implementation of probe_kernel_write() and
instead use a new function s390_kernel_write() to modify kernel text and
data everywhere.

The s390 implementation of probe_kernel_write() was potentially broken
since it modified memory in a read-modify-write fashion, which read four
bytes, modified the requested bytes within those four bytes and wrote
the result back.
If two cpus would modify the same four byte area at different locations
within that area, this could lead to corruption.
Right now the only places which called probe_kernel_write() did run within
stop_machine_run. Therefore the scenario can't happen right now, however
that might change at any time.

To fix this rename probe_kernel_write() to s390_kernel_write() which can
have special semantics, like only call it while running within stop_machine().

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-25 11:49:43 +01:00
..
vdso32 s390/vdso: fix stack corruption 2014-10-27 13:27:02 +01:00
vdso64 s390/vdso: fix clock_gettime for CLOCK_THREAD_CPUTIME_ID, -2 and -3 2015-02-12 09:37:21 +01:00
.gitignore s390: add various .gitignore files. 2012-05-16 14:42:41 +02:00
asm-offsets.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
audit.c
audit.h
base.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
cache.c s390/cacheinfo: coding style changes 2015-02-12 09:37:24 +01:00
compat_audit.c
compat_linux.c groups: Consolidate the setgroups permission checks 2014-12-05 17:19:27 -06:00
compat_linux.h s390: add support for vector extension 2014-10-09 09:14:13 +02:00
compat_ptrace.h [S390] ptrace cleanup 2011-01-05 12:47:31 +01:00
compat_signal.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
compat_wrapper.c s390/kernel: add system calls for PCI memory access 2014-11-19 09:46:43 +01:00
cpcmd.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
crash_dump.c s390/kdump: add support for vector extension 2014-10-09 09:14:16 +02:00
debug.c s390/debug: avoid function call for debug_sprintf_* 2014-12-08 09:42:29 +01:00
diag.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
dis.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
dumpstack.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
early.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
ebcdic.c s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
entry.h s390/signal: add sys_sigreturn and sys_rt_sigreturn declarations 2015-01-08 10:02:49 +01:00
entry.S s390: remove 31 bit syscalls 2015-03-25 11:49:35 +01:00
ftrace.c s390/maccess: remove potentially broken probe_kernel_write() 2015-03-25 11:49:43 +01:00
head64.S s390: fix kernel crash due to linkage stack instructions 2014-02-05 11:00:50 +01:00
head_kdump.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
head.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
idle.c s390/idle: convert open coded idle time seqcount 2014-12-08 09:42:32 +01:00
ipl.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
irq.c s390/irq: use irq 0 2014-11-18 18:23:03 +01:00
jump_label.c s390/maccess: remove potentially broken probe_kernel_write() 2015-03-25 11:49:43 +01:00
kprobes.c s390/maccess: remove potentially broken probe_kernel_write() 2015-03-25 11:49:43 +01:00
lgr.c s390/sysinfo,stsi: change return code handling 2012-09-26 15:45:12 +02:00
machine_kexec.c s390: add SMT support 2015-01-22 12:16:01 +01:00
Makefile s390: remove "64" suffix from a couple of files 2015-03-25 11:49:34 +01:00
mcount.S s390/ftrace: hotpatch support for function tracing 2015-01-29 09:19:25 +01:00
module.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
nmi.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
os_info.c Include missing linux/slab.h inclusions 2013-04-29 15:42:01 -04:00
perf_cpum_cf_events.c s390/cpum_cf: Export event names in sysfs 2013-12-16 14:37:50 +01:00
perf_cpum_cf.c s390: Replace __get_cpu_var uses 2014-08-26 13:45:52 -04:00
perf_cpum_sf.c s390/cpum_sf: add diagnostic sampling event only if it is authorized 2015-03-13 12:15:44 +01:00
perf_event.c s390/perf: make print_debug_cf() static 2014-03-14 12:59:32 +01:00
pgm_check.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
process.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
processor.c s390/ftrace: fix crashes when switching tracers / add notrace to cpu_relax() 2015-03-02 11:35:53 -08:00
ptrace.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
reipl.S s390: remove "64" suffix from a couple of files 2015-03-25 11:49:34 +01:00
relocate_kernel.S s390: remove "64" suffix from a couple of files 2015-03-25 11:49:34 +01:00
runtime_instr.c s390/irq: Use defines for external interruption codes 2014-04-03 14:30:52 +02:00
s390_ksyms.c s390: use IS_ENABLED to check if a CONFIG is set to y or m 2013-12-16 14:38:04 +01:00
sclp.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
setup.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
signal.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
smp.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
stacktrace.c s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
suspend.c nosave: consolidate __nosave_{begin,end} in <asm/sections.h> 2014-10-09 22:26:04 -04:00
swsusp_asm64.S s390/smp: reenable smt after resume 2015-03-25 11:47:07 +01:00
sys_s390.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
syscalls.S s390: remove 31 bit syscalls 2015-03-25 11:49:35 +01:00
sysinfo.c Fairly small update, but there are some interesting new features. 2015-02-13 09:55:09 -08:00
time.c s390/kprobes: make use of NOKPROBE_SYMBOL() 2014-10-27 13:27:28 +01:00
topology.c s390/topology: convert cpu_topology array to per cpu variable 2015-02-12 09:37:22 +01:00
traps.c s390/traps: panic() instead of die() on translation exception 2015-03-25 11:49:38 +01:00
uprobes.c s390/uprobes: fix user space PER events 2015-01-12 10:24:58 +01:00
vdso.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
vmlinux.lds.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
vtime.c s390: add SMT support 2015-01-22 12:16:01 +01:00