AuxXxilium/linux_dsm_epyc7002
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d1befa6582
linux_dsm_epyc7002/arch/s390/kernel
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Vasily Gorbik d1befa6582 s390/vdso: avoid 64-bit vdso mapping for compat tasks 
vdso_fault used is_compat_task function (on s390 it tests "current"
thread_info flags) to distinguish compat tasks and map 31-bit vdso
pages. But "current" task might not correspond to mm context.

When 31-bit compat inferior is executed under gdb, gdb does
PTRACE_PEEKTEXT on vdso page, causing vdso_fault with "current" being
64-bit gdb process. So, 31-bit inferior ends up with 64-bit vdso mapped.

To avoid this problem a new compat_mm flag has been introduced into
mm context. This flag is used in vdso_fault and vdso_mremap instead
of is_compat_task.

Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-09-20 13:20:29 +02:00
..
syscalls kbuild: do not redirect the first prerequisite for filechk 2018-07-28 10:34:10 +09:00
vdso32 s390/vdso: revise CFI annotations of vDSO functions 2017-12-13 10:51:36 +01:00
vdso64 s390/vdso: revise CFI annotations of vDSO functions 2017-12-13 10:51:36 +01:00
.gitignore s390: add various .gitignore files. 2012-05-16 14:42:41 +02:00
alternative.c s390: add automatic detection of the spectre defense 2018-03-28 08:38:24 +02:00
asm-offsets.c s390: remove gcc version check (4.3 or newer) 2018-08-21 15:57:58 +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 2018-05-07 21:12:39 +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 mm: add ksys_readahead() helper; remove in-kernel calls to sys_readahead() 2018-04-02 20:16:12 +02:00
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 s390/compat: fix setup_frame32 2018-04-10 07:38:54 +02:00
compat_wrapper.c s390: wire up rseq system call 2018-07-04 08:35:18 +02:00
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 s390/kdump: Remove kzalloc_panic 2018-08-16 14:49:15 +02:00
debug.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
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: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00
dumpstack.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00
early_nobss.c s390/early: move functions which may not access bss section to extra file 2018-05-09 10:55:01 +02:00
early_printk.c s390/hibernate: fix error handling when suspend cpu != resume cpu 2018-09-20 13:20:23 +02:00
early.c s390/boot: block uncompressed vmlinux booting attempts 2018-07-02 11:25:05 +02:00
ebcdic.c s390: ebcdic: convert comments to UTF-8 2018-08-23 18:48:43 -07:00
entry.h s390/boot: make head.S and als.c be part of the decompressor only 2018-06-25 10:14:38 +02:00
entry.S s390: wire up rseq system call 2018-07-04 08:35:18 +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 s390/ftrace: Add -mfentry and -mnop-mcount support 2018-08-15 22:39:53 -04:00
guarded_storage.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2017-11-13 11:47:01 -08:00
head64.S s390: correct _stext offset 2018-07-02 11:24:59 +02:00
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/ipl: remove reipl_method and dump_method 2018-04-10 07:39:00 +02:00
irq.c s390: remove indirect branch from do_softirq_own_stack 2018-05-07 21:12:42 +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
kexec_elf.c s390/kexec_file: Add ELF loader 2018-04-16 09:10:23 +02:00
kexec_image.c s390/kexec_file: Add crash support to image loader 2018-04-16 09:10:22 +02:00
kprobes.c bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe 2018-06-21 12:33:19 +02:00
lgr.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00
machine_kexec_file.c s390/kexec_file: Add ELF loader 2018-04-16 09:10:23 +02:00
machine_kexec.c s390/ipl: correct kdump reipl block checksum calculation 2018-04-10 07:39:00 +02:00
Makefile s390/boot: make head.S and als.c be part of the decompressor only 2018-06-25 10:14:38 +02:00
mcount.S s390/ftrace: Add -mfentry and -mnop-mcount support 2018-08-15 22:39:53 -04:00
module.c treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
nmi.c headers: untangle kmemleak.h from mm.h 2018-04-05 21:36:27 -07:00
nospec-branch.c s390: detect etoken facility 2018-07-18 08:32:17 +02:00
nospec-sysfs.c s390: detect etoken facility 2018-07-18 08:32:17 +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 treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
perf_cpum_cf.c s390: kernel: Remove redundant license text 2017-11-24 15:37:20 +01:00
perf_cpum_sf.c Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2018-08-21 13:47:29 -07:00
perf_event.c s390: kernel: Remove redundant license text 2017-11-24 15:37:20 +01:00
perf_regs.c s390/perf: fix gcc 8 array-bounds warning 2018-07-02 11:24:54 +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: update sampling tag after task pid change 2018-04-23 07:57:17 +02:00
processor.c s390: run user space and KVM guests with modified branch prediction 2018-02-05 14:48:50 +01:00
ptrace.c s390/gs: add compat regset for the guarded storage broadcast control block 2017-11-28 17:33:15 +01:00
reipl.S s390/kernel: use expoline for indirect branches 2018-05-07 21:12:39 +02:00
relocate_kernel.S s390: assume diag308 set always works 2018-04-10 07:38:59 +02:00
runtime_instr.c s390/runtime_instrumentation: re-add signum system call parameter 2018-02-05 07:34:50 +01:00
setup.c s390/setup: do not reserve the decompressor code 2018-06-25 10:14:41 +02:00
signal.c s390: wire up rseq system call 2018-07-04 08:35:18 +02:00
smp.c headers: untangle kmemleak.h from mm.h 2018-04-05 21:36:27 -07:00
stacktrace.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00
sthyi.c treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
suspend.c s390: unify linker symbols usage 2018-02-27 08:05:23 +01:00
swsusp.S s390/hibernate: fix error handling when suspend cpu != resume cpu 2018-09-20 13:20:23 +02:00
sys_s390.c mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff() 2018-04-02 20:16:11 +02:00
sysinfo.c s390/sysinfo: add missing #ifdef CONFIG_PROC_FS 2018-07-02 12:32:20 +02:00
time.c s390/time: Remove read_boot_clock64() 2018-07-20 00:02:41 +02:00
topology.c s390/topology: correct topology mode proc handler 2018-07-06 08:47:53 +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 signal/s390: Use force_sig_fault where appropriate 2018-04-25 10:44:08 -05:00
uprobes.c s390/uprobes: implement arch_uretprobe_is_alive() 2018-04-23 07:57:16 +02:00
vdso.c s390/vdso: avoid 64-bit vdso mapping for compat tasks 2018-09-20 13:20:29 +02:00
vmlinux.lds.S s390: move _text to an actual .text start 2018-07-02 11:25:00 +02:00
vtime.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00