Christian Borntraeger 2b6eff5923 s390: Correct register corruption in critical section cleanup ...

commit 891f6a726c upstream.

In the critical section cleanup we must not mess with r1.  For march=z9
or older, larl + ex (instead of exrl) are used with r1 as a temporary
register. This can clobber r1 in several interrupt handlers. Fix this by
using r11 as a temp register.  r11 is being saved by all callers of
cleanup_critical.

Fixes: 6dd85fbb87 ("s390: move expoline assembler macros to a header")
Cc: stable@vger.kernel.org #v4.16
Reported-by: Oliver Kurz <okurz@suse.com>
Reported-by: Petr Tesařík <ptesarik@suse.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-07-11 16:29:14 +02:00

..

vdso32

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

vdso64

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

.gitignore

s390: add various .gitignore files.

2012-05-16 14:42:41 +02:00

als.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

alternative.c

s390: add automatic detection of the spectre defense

2018-04-29 11:33:15 +02:00

asm-offsets.c

s390/ftrace: use expoline for indirect branches

2018-05-25 16:17:32 +02:00

audit.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

audit.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

base.S

s390/kernel: use expoline for indirect branches

2018-05-25 16:17:32 +02:00

cache.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

compat_audit.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

compat_linux.c

s390: fix handling of -1 in set{,fs}[gu]id16 syscalls

2018-02-22 15:42:17 +01:00

compat_linux.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

compat_ptrace.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

compat_signal.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

compat_wrapper.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

cpcmd.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

crash_dump.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

debug.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

diag.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

dis.c

s390/disassembler: increase show_code buffer size

2017-11-30 08:40:38 +00:00

dumpstack.c

s390/mm: use new mm defines instead of magic values

2017-07-26 08:25:09 +02:00

early_printk.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

early.c

s390: add options to change branch prediction behaviour for the kernel

2018-04-29 11:33:14 +02:00

ebcdic.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

entry.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

entry.S

s390: Correct register corruption in critical section cleanup

2018-07-11 16:29:14 +02:00

fpu.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

ftrace.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

guarded_storage.c

s390/guarded storage: fix possible memory corruption

2017-11-30 08:40:38 +00:00

head64.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

head_kdump.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

head.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

idle.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

ipl.c

s390: add options to change branch prediction behaviour for the kernel

2018-04-29 11:33:14 +02:00

irq.c

s390: remove indirect branch from do_softirq_own_stack

2018-05-22 18:53:59 +02:00

jump_label.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

kdebugfs.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

kprobes.c

s390: Prevent hotplug rwsem recursion

2017-05-26 10:10:46 +02:00

lgr.c

s390: kernel: make lgr explicitly non-modular

2016-10-31 17:55:42 +01:00

machine_kexec.c

s390/noexec: execute kexec datamover without DAT

2017-11-30 08:40:38 +00:00

Makefile

s390: move spectre sysfs attribute code

2018-05-25 16:17:33 +02:00

mcount.S

s390/ftrace: use expoline for indirect branches

2018-05-25 16:17:32 +02:00

module.c

s390: correct module section names for expoline code revert

2018-04-29 11:33:16 +02:00

nmi.c

KVM: s390: Backup the guest's machine check info

2017-06-27 16:05:38 +02:00

nospec-branch.c

s390: extend expoline to BC instructions

2018-05-25 16:17:33 +02:00

nospec-sysfs.c

s390: move spectre sysfs attribute code

2018-05-25 16:17:33 +02:00

os_info.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

perf_cpum_cf_events.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

perf_cpum_cf.c

s390/cpum_cf: make hw_perf_event_update() a void function

2017-03-31 07:53:35 +02:00

perf_cpum_sf.c

s390/cpum_sf: ensure sample frequency of perf event attributes is non-zero

2018-05-22 18:53:59 +02:00

perf_event.c

s390/perf: fix null string in perf list pmu command

2017-06-12 16:26:00 +02:00

pgm_check.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

process.c

s390/runtime instrumentation: simplify task exit handling

2017-12-10 13:40:37 +01:00

processor.c

s390: run user space and KVM guests with modified branch prediction

2018-04-29 11:33:14 +02:00

ptrace.c

s390/ptrace: fix guarded storage regset handling

2017-12-10 13:40:43 +01:00

reipl.S

s390/kernel: use expoline for indirect branches

2018-05-25 16:17:32 +02:00

relocate_kernel.S

s390/noexec: execute kexec datamover without DAT

2017-11-30 08:40:38 +00:00

runtime_instr.c

s390/runtime instrumentation: simplify task exit handling

2017-12-10 13:40:37 +01:00

setup.c

s390: correct nospec auto detection init order

2018-04-29 11:33:16 +02:00

signal.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

smp.c

s390: introduce execute-trampolines for branches

2018-04-29 11:33:15 +02:00

stacktrace.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>

2017-03-02 08:42:34 +01:00

suspend.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

swsusp.S

s390/kernel: use expoline for indirect branches

2018-05-25 16:17:32 +02:00

sys_s390.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

syscalls.S

s390: fix compat system call table

2017-12-14 09:52:56 +01:00

sysinfo.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

time.c

s390/dasd: Change unsigned long long to unsigned long

2017-08-23 13:31:51 +02:00

topology.c

s390/topology: enable / disable topology dynamically

2017-09-20 13:47:55 +02:00

trace.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

traps.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

uprobes.c

s390/uprobes: implement arch_uretprobe_is_alive()

2018-04-29 11:33:18 +02:00

vdso.c

s390/mm: tag normal pages vs pages used in page tables

2017-07-25 06:55:28 +02:00

vmlinux.lds.S

s390: introduce execute-trampolines for branches

2018-04-29 11:33:15 +02:00

vtime.c

s390/cputime: simplify account_system_index_scaled

2017-06-12 16:25:57 +02:00