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linux/arch/s390/kernel
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Sven Schnelle d111855ab7 s390/mm: Fix NULL pointer dereference 
The recently added check to figure out if a fault happened on gmap ASCE
dereferences the gmap pointer in lowcore without checking that it is not
NULL. For all non-KVM processes the pointer is NULL, so that some value
from lowcore will be read. With the current layouts of struct gmap and
struct lowcore the read value (aka ASCE) is zero, so that this doesn't lead
to any observable bug; at least currently.

Fix this by adding the missing NULL pointer check.

Fixes: 64c3431808bd ("s390/entry: compare gmap asce to determine guest/host fault")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
2024-04-17 17:26:34 +02:00
..
syscalls
lsm/stable-6.8 PR 20240105
2024-01-09 12:57:46 -08:00
vdso32
s390/vdso: remove unused ENTRY in linker scripts
2024-02-14 13:50:53 +01:00
vdso64
s390/vdso64: filter out munaligned-symbols flag for vdso
2024-02-20 14:37:33 +01:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
abs_lowcore.c
s390/mm: allocate Absolute Lowcore Area in decompressor
2023-01-13 14:15:06 +01:00
alternative.c
s390/alternatives: remove padding generation code
2022-05-17 15:16:28 +02:00
asm-offsets.c
s390/tracing: pass struct ftrace_regs to ftrace_trace_function
2023-07-24 12:12:24 +02:00
audit.c
audit: add support for the openat2 syscall
2021-10-01 16:52:48 -04:00
audit.h
…
cache.c
s390/cache: prevent rebuild of shared_cpu_list
2024-03-07 14:41:15 +01:00
cert_store.c
s390/cert_store: fix string length handling
2023-09-19 13:25:44 +02:00
compat_audit.c
audit: add support for the openat2 syscall
2021-10-01 16:52:48 -04:00
compat_linux.c
…
compat_linux.h
s390/compat: cleanup compat_linux.h header file
2022-05-06 20:45:16 +02:00
compat_ptrace.h
…
compat_signal.c
s390/fpu: rename save_fpu_regs() to save_user_fpu_regs(), etc
2024-02-16 14:30:15 +01:00
cpcmd.c
s390: include linux/io.h instead of asm/io.h
2023-07-03 11:19:40 +02:00
cpufeature.c
s390/uvdevice: autoload module based on CPU facility
2022-07-19 16:18:49 +02:00
crash_dump.c
s390/fpu: move, rename, and merge header files
2024-02-16 14:30:14 +01:00
ctlreg.c
s390/ctlreg: add system_ctl_load()
2023-09-19 13:26:57 +02:00
debug.c
S390: Remove now superfluous sentinel elem from ctl_table arrays
2023-10-10 15:22:02 -07:00
diag.c
s390/diag: add missing virt_to_phys() translation to diag14()
2024-02-09 13:58:14 +01:00
dis.c
s390: fix various typos
2023-07-03 11:19:42 +02:00
dumpstack.c
s390/dumpstack: simplify in stack logic code
2023-04-04 18:34:55 +02:00
early_printk.c
s390/sclp: remove unused sclp_early_printk_forced
2020-09-21 08:08:44 +02:00
early.c
s390/fpu: move, rename, and merge header files
2024-02-16 14:30:14 +01:00
earlypgm.S
s390/earlypgm: use SYM* macros instead of ENTRY(), etc.
2023-04-19 17:24:17 +02:00
ebcdic.c
s390/ebcdic: fix typo in comment
2023-07-27 13:11:35 +02:00
entry.h
s390/switch_to: use generic header file
2024-02-12 15:03:33 +01:00
entry.S
s390/mm: Fix NULL pointer dereference
2024-04-17 17:26:34 +02:00
facility.c
KVM: s390: vsie: Fix length of facility list shadowed
2023-12-23 10:41:09 +01:00
fpu.c
s390/fpu: limit save and restore to used registers
2024-02-16 14:30:16 +01:00
ftrace.c
s390/ftrace: do not assume module_alloc() returns executable memory
2023-04-13 17:36:26 +02:00
ftrace.h
s390: raise minimum supported machine generation to z10
2022-03-10 15:58:17 +01:00
guarded_storage.c
s390: use control register bit defines
2023-09-19 13:26:57 +02:00
head64.S
s390: consistently use .balign instead of .align
2023-06-28 13:57:09 +02:00
idle.c
sched/idle: Mark arch_cpu_idle_dead() __noreturn
2023-03-08 08:44:28 -08:00
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/checksum: provide and use cksm() inline assembly
2024-02-16 14:30:17 +01:00
irq.c
s390/ctlreg: add local and system prefix to some functions
2023-09-19 13:26:56 +02:00
jump_label.c
jump_label: make initial NOP patching the special case
2022-06-24 09:48:55 +02:00
kdebugfs.c
…
kexec_elf.c
s390, crash: wrap crash dumping code into crash related ifdefs
2024-02-23 17:48:23 -08:00
kexec_image.c
s390, crash: wrap crash dumping code into crash related ifdefs
2024-02-23 17:48:23 -08:00
kprobes_insn_page.S
s390: consistently use .balign instead of .align
2023-06-28 13:57:09 +02:00
kprobes.c
s390/ctlreg: add struct ctlreg
2023-09-19 13:26:56 +02:00
kprobes.h
s390/kprobes: define insn cache ops within private header file
2022-11-23 16:24:07 +01:00
lgr.c
s390/lgr: use simple assignment instead of memcpy
2022-02-06 23:31:29 +01:00
machine_kexec_file.c
s390, crash: wrap crash dumping code into crash related ifdefs
2024-02-23 17:48:23 -08:00
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
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
2024-03-14 17:43:30 -07:00
Makefile
arch, crash: move arch_crash_save_vmcoreinfo() out to file vmcore_info.c
2024-02-23 17:48:25 -08:00
mcount.S
s390: remove unneeded #include <asm/export.h>
2023-08-09 15:20:50 +02:00
module.c
s390/module: fix rela calculation for R_390_GOTENT
2023-06-20 19:55:00 +02:00
nmi.c
s390/fpu: move, rename, and merge header files
2024-02-16 14:30:14 +01:00
nospec-branch.c
s390: fix various typos
2023-07-03 11:19:42 +02:00
nospec-sysfs.c
s390: introduce nospec_uses_trampoline()
2021-10-26 15:21:29 +02:00
numa.c
drivers/base/node: consolidate node device subsystem initialization in node_dev_init()
2022-03-22 15:57:10 -07:00
os_info.c
s390/checksum: provide and use cksm() inline assembly
2024-02-16 14:30:17 +01:00
perf_cpum_cf_events.c
s390/cpumf: add new extended counter set for IBM z16
2022-05-16 10:58:33 +02:00
perf_cpum_cf.c
s390: use control register bit defines
2023-09-19 13:26:57 +02:00
perf_cpum_sf.c
s390/cpum_sf: remove check on CPU being online
2023-07-04 07:45:18 +02:00
perf_event.c
s390/perf: implement perf_callchain_user()
2023-11-05 22:34:57 +01:00
perf_pai_crypto.c
s390/pai: fix sampling event removal for PMU device driver
2024-04-03 15:00:20 +02:00
perf_pai_ext.c
s390/pai: fix sampling event removal for PMU device driver
2024-04-03 15:00:20 +02:00
perf_regs.c
s390/fpu: remove anonymous union from struct fpu
2024-02-16 14:30:16 +01:00
process.c
s390/fpu: remove regs member from struct fpu
2024-02-16 14:30:16 +01:00
processor.c
s390/fpu: get rid of MACHINE_HAS_VX
2023-12-11 14:33:07 +01:00
ptrace.c
s390/fpu: remove anonymous union from struct fpu
2024-02-16 14:30:16 +01:00
reipl.S
s390/reipl: use SYM* macros instead of ENTRY(), etc.
2023-04-19 17:24:17 +02:00
relocate_kernel.S
s390/relocate_kernel: adjust indentation
2023-04-19 17:24:18 +02:00
rethook.c
s390/rethook: add local rethook header file
2023-02-06 11:13:53 +01:00
rethook.h
s390/rethook: add local rethook header file
2023-02-06 11:13:53 +01:00
runtime_instr.c
s390/runtime_instrumentation: fix storage key handling
2020-08-17 13:17:10 +02:00
setup.c
s390/setup: fix virtual vs physical address confusion
2024-02-16 14:30:12 +01:00
signal.c
s390/fpu: rename save_fpu_regs() to save_user_fpu_regs(), etc
2024-02-16 14:30:15 +01:00
smp.c
s390/fpu: move, rename, and merge header files
2024-02-16 14:30:14 +01:00
stacktrace.c
s390: add USER_STACKTRACE support
2023-11-05 22:34:57 +01:00
sthyi.c
s390 updates for 6.6 merge window
2023-08-28 17:22:39 -07:00
syscall.c
s390: add support for BEAR enhancement facility
2021-10-26 15:21:29 +02:00
sysinfo.c
s390/sysinfo: allow response buffer in normal memory
2024-03-13 09:23:44 +01:00
text_amode31.S
s390/hypfs_diag0c: fix virtual vs physical address confusion
2024-02-09 13:58:13 +01:00
time.c
s390/time: make stp_subsys const
2024-02-09 13:58:15 +01:00
topology.c
sysctl-6.7-rc1
2023-11-01 20:51:41 -10:00
trace.c
s390/ftrace: fix potential crashes when switching tracers
2020-04-22 16:20:55 +02:00
traps.c
s390/fpu: rename save_fpu_regs() to save_user_fpu_regs(), etc
2024-02-16 14:30:15 +01:00
unwind_bc.c
s390/unwind: avoid duplicated unwinding entries for kretprobes
2022-03-27 22:18:39 +02:00
uprobes.c
s390/switch_to: use generic header file
2024-02-12 15:03:33 +01:00
uv.c
s390/uv: UV feature check utility
2023-08-28 09:27:55 +00:00
vdso.c
s390/vdso: Use generic union vdso_data_store
2024-02-20 20:56:00 +01:00
vmcore_info.c
arch, crash: move arch_crash_save_vmcoreinfo() out to file vmcore_info.c
2024-02-23 17:48:25 -08:00
vmlinux.lds.S
s390/boot: simplify GOT handling
2024-02-26 10:25:09 +01:00
vtime.c
s390/vtime: fix average steal time calculation
2024-03-13 09:23:44 +01:00