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Alexander Gordeev 4b198c41d7 s390/boot: fix absolute zero lowcore corruption on boot 
[ Upstream commit 12dd19c159659ec9050f45dc8a2ff3c3917f4be3 ]

Crash dump always starts on CPU0. In case CPU0 is offline the
prefix page is not installed and the absolute zero lowcore is
used. However, struct lowcore::mcesad is never assigned and
stays zero. That leads to __machine_kdump() -> save_vx_regs()
call silently stores vector registers to the absolute lowcore
at 0x11b0 offset.

Fixes: a62bc0739253 ("s390/kdump: add support for vector extension")
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-09-15 11:30:07 +02:00
..
syscalls
compat: remove some compat entry points
2021-09-08 15:32:35 -07:00
vdso32
s390 updates for 5.15 merge window
2021-08-30 13:07:15 -07:00
vdso64
s390/vdso: filter out -mstack-guard and -mstack-size
2021-11-25 09:48:45 +01:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
alternative.c
s390/facilities: move stfl information from lowcore to global data
2021-06-07 17:06:58 +02:00
asm-offsets.c
s390/dump: fix old lowcore virtual vs physical address confusion
2022-08-17 14:24:09 +02:00
audit.c
…
audit.h
…
base.S
s390: remove unused s390_base_ext_handler
2020-11-09 11:20:58 +01:00
cache.c
…
compat_audit.c
…
compat_linux.c
s390: use generic UID16 implementation
2019-01-18 09:33:18 +01:00
compat_linux.h
…
compat_ptrace.h
…
compat_signal.c
s390/signal: switch to using vdso for sigreturn and syscall restart
2021-07-08 22:09:47 +02:00
cpcmd.c
s390/cpcmd: use register pair instead of register asm
2021-06-18 16:41:22 +02:00
crash_dump.c
s390/crash: fix incorrect number of bytes to copy to user space
2022-08-17 14:24:10 +02:00
debug.c
s390/sclp: add tracing of SCLP interactions
2021-08-25 11:03:35 +02:00
diag.c
s390: rename dma section to amode31
2021-08-05 14:10:53 +02:00
dis.c
s390/disassembler: add instructions
2021-07-27 09:39:19 +02:00
dumpstack.c
s390/unwind: add machine check handler stack
2021-04-05 11:30:07 +02:00
early_printk.c
s390/sclp: remove unused sclp_early_printk_forced
2020-09-21 08:08:44 +02:00
early.c
s390: make PCI mio support a machine flag
2021-07-27 09:39:19 +02:00
ebcdic.c
s390: ebcdic: convert comments to UTF-8
2018-08-23 18:48:43 -07:00
entry.h
s390/boot: allocate amode31 section in decompressor
2022-07-12 16:34:56 +02:00
entry.S
s390/mcck: isolate SIE instruction when setting CIF_MCCK_GUEST flag
2022-06-14 18:36:13 +02:00
fpu.c
s390: convert to generic entry
2021-01-19 12:29:26 +01:00
ftrace.c
s390/ftrace: remove incorrect __va usage
2021-09-08 14:23:31 +02:00
ftrace.h
s390/ftrace: implement hotpatching
2021-08-03 14:31:40 +02:00
guarded_storage.c
…
head64.S
s390/boot: move dma sections from decompressor to decompressed kernel
2021-07-27 09:39:17 +02:00
idle.c
s390/time,idle: get rid of unsigned long long
2021-03-08 10:46:27 +01:00
ima_arch.c
s390/kexec_file: Disable kexec_load when IPLed secure
2019-04-29 10:44:03 +02:00
ipl_vmparm.c
s390/cio: remove unused include linux/spinlock.h from cio.h
2021-07-27 09:39:13 +02:00
ipl.c
s390/maccess: rework absolute lowcore accessors
2022-08-17 14:24:13 +02:00
irq.c
s390/entry: fix duplicate tracking of irq nesting level
2021-12-22 09:32:36 +01:00
jump_label.c
s390/jump_label: print real address in a case of a jump label bug
2021-07-27 09:39:13 +02:00
kdebugfs.c
s390: no need to check return value of debugfs_create functions
2019-01-28 15:58:55 +01:00
kexec_elf.c
kexec: Fix file verification on S390
2019-09-10 13:27:51 +01:00
kexec_image.c
kexec_file: split KEXEC_VERIFY_SIG into KEXEC_SIG and KEXEC_SIG_FORCE
2019-08-19 21:54:15 -07:00
kprobes_insn_page.S
s390/kprobes: move insn_page to text segment
2020-10-09 23:45:30 +02:00
kprobes.c
s390/kprobes: use is_kernel() helper
2021-07-05 12:44:23 +02:00
lgr.c
s390: convert to msecs_to_jiffies()
2020-06-29 16:31:46 +02:00
machine_kexec_file.c
kexec, KEYS, s390: Make use of built-in and secondary keyring for signature verification
2022-08-17 14:24:23 +02:00
machine_kexec_reloc.c
s390/kaslr: add support for R_390_JMP_SLOT relocation type
2020-05-20 10:13:27 +02:00
machine_kexec.c
s390/maccess: rework absolute lowcore accessors
2022-08-17 14:24:13 +02:00
Makefile
s390: rename dma section to amode31
2021-08-05 14:10:53 +02:00
mcount.S
s390/ftrace: fix ftrace_update_ftrace_func implementation
2021-07-15 12:54:58 +02:00
module.c
mm: defer kmemleak object creation of module_alloc()
2022-03-08 19:12:38 +01:00
nmi.c
s390/boot: fix absolute zero lowcore corruption on boot
2022-09-15 11:30:07 +02:00
nospec-branch.c
s390/speculation: Use statically initialized const for instructions
2021-06-28 11:18:28 +02:00
nospec-sysfs.c
s390/facilities: move stfl information from lowcore to global data
2021-06-07 17:06:58 +02:00
numa.c
s390/numa: move code to arch/s390/kernel
2020-08-11 18:16:55 +02:00
os_info.c
s390/maccess: rework absolute lowcore accessors
2022-08-17 14:24:13 +02:00
perf_cpum_cf_common.c
s390/cpumf: Allow concurrent access for CPU Measurement Counter Facility
2021-07-05 12:44:23 +02:00
perf_cpum_cf_events.c
s390/cpum_cf,perf: change DFLT_CCERROR counter name
2020-07-21 13:53:56 +02:00
perf_cpum_cf.c
s390/cpumf: Handle events cycles and instructions identical
2022-06-29 09:03:26 +02:00
perf_cpum_sf.c
s390/time: convert tod_clock_base to union
2021-02-13 17:17:54 +01:00
perf_event.c
s390/perf: obtain sie_block from the right address
2022-06-09 10:23:21 +02:00
perf_regs.c
perf/arch: Remove perf_sample_data::regs_user_copy
2020-11-09 18:12:34 +01:00
process.c
s390: fix double free of GS and RI CBs on fork() failure
2022-08-31 17:16:48 +02:00
processor.c
s390: replace deprecated CPU-hotplug functions
2021-08-05 14:10:53 +02:00
ptrace.c
s390/traps: add struct to access transactional diagnostic block
2021-06-07 17:06:58 +02:00
reipl.S
s390: add missing ENDPROC statements to assembler functions
2019-05-02 13:54:11 +02:00
relocate_kernel.S
s390: add missing ENDPROC statements to assembler functions
2019-05-02 13:54:11 +02:00
runtime_instr.c
s390/runtime_instrumentation: fix storage key handling
2020-08-17 13:17:10 +02:00
setup.c
s390/boot: fix absolute zero lowcore corruption on boot
2022-09-15 11:30:07 +02:00
signal.c
s390: remove do_signal() prototype and do_notify_resume() function
2021-08-25 11:03:34 +02:00
smp.c
s390/maccess: rework absolute lowcore accessors
2022-08-17 14:24:13 +02:00
stacktrace.c
stacktrace: Move documentation for arch_stack_walk_reliable() to header
2021-03-10 15:52:31 +01:00
sthyi.c
s390/sthyi: use register pair instead of register asm
2021-06-18 16:41:22 +02:00
syscall.c
s390: rename PIF_SYSCALL_RESTART to PIF_EXECVE_PGSTE_RESTART
2021-07-08 22:12:17 +02:00
sysinfo.c
s390/sysinfo: get rid of register asm
2021-06-18 16:41:23 +02:00
text_amode31.S
s390/diag: make restart_part2 a local label
2021-08-25 11:03:34 +02:00
time.c
s390/stp: clock_delta should be signed
2022-06-09 10:23:21 +02:00
topology.c
s390/topology: fix topology information when calling cpu hotplug notifiers
2021-09-07 13:38:41 +02:00
trace.c
s390/ftrace: fix potential crashes when switching tracers
2020-04-22 16:20:55 +02:00
traps.c
s390/traps: improve panic message for translation-specification exception
2022-05-25 09:57:25 +02:00
unwind_bc.c
s390/unwind: stop gracefully at user mode pt_regs in irq stack
2019-12-18 23:29:26 +01:00
uprobes.c
s390: Fix fall-through warnings for Clang
2021-07-13 14:43:09 -05:00
uv.c
s390/uv: fully validate the VMA before calling follow_page()
2021-11-18 19:16:40 +01:00
vdso.c
s390/vdso: add minimal compat vdso
2021-07-08 15:37:28 +02:00
vmlinux.lds.S
s390: fix nospec table alignments
2022-09-08 12:28:07 +02:00
vtime.c
s390/vtime: fix increased steal time accounting
2021-03-15 19:09:25 +01:00