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Andrey Ryabinin 39d114ddc6 arm64: add KASAN support 
This patch adds arch specific code for kernel address sanitizer
(see Documentation/kasan.txt).

1/8 of kernel addresses reserved for shadow memory. There was no
big enough hole for this, so virtual addresses for shadow were
stolen from vmalloc area.

At early boot stage the whole shadow region populated with just
one physical page (kasan_zero_page). Later, this page reused
as readonly zero shadow for some memory that KASan currently
don't track (vmalloc).
After mapping the physical memory, pages for shadow memory are
allocated and mapped.

Functions like memset/memmove/memcpy do a lot of memory accesses.
If bad pointer passed to one of these function it is important
to catch this. Compiler's instrumentation cannot do this since
these functions are written in assembly.
KASan replaces memory functions with manually instrumented variants.
Original functions declared as weak symbols so strong definitions
in mm/kasan/kasan.c could replace them. Original functions have aliases
with '__' prefix in name, so we could call non-instrumented variant
if needed.
Some files built without kasan instrumentation (e.g. mm/slub.c).
Original mem* function replaced (via #define) with prefixed variants
to disable memory access checks for such files.

Signed-off-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-10-12 17:46:36 +01:00
..
basic kbuild: fixdep: drop meaningless hash table initialization 2015-08-24 16:36:08 +02:00
coccinelle Merge branch 'akpm' (patches from Andrew) 2015-09-08 17:52:23 -07:00
dtc scripts/dtc: Update to upstream version 9d3649bd3be245c9 2015-04-29 17:17:27 -05:00
gdb scripts/gdb: remove useless global instruction 2015-06-30 19:44:58 -07:00
genksyms genksyms: Regenerate parser 2015-08-20 14:57:47 +02:00
kconfig Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2015-09-08 14:17:38 -07:00
ksymoops
mod Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2015-09-08 14:12:19 -07:00
package deb-pkg: add source package 2015-09-04 11:25:03 +02:00
selinux selinux: explicitly declare the role "base_r" 2015-07-13 13:32:00 -04:00
tracing kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
.gitignore scripts: add extract-cert and sign-file to .gitignore 2015-08-27 03:59:11 +10:00
analyze_suspend.py PM / tools: analyze_suspend.py: update to v3.0 2014-08-09 02:47:58 +02:00
asn1_compiler.c ASN.1: Copy string names to tokens in ASN.1 compiler 2015-08-07 16:26:13 +01:00
bloat-o-meter bloat-o-meter: Ignore syscall aliases SyS_ and compat_SyS_ 2014-08-23 13:08:48 -07:00
bootgraph.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
check_extable.sh scripts: add check_extable.sh script. 2015-04-13 21:03:02 +09:30
checkincludes.pl
checkkconfigsymbols.py scripts/checkkconfigsymbols.py: support default statements 2015-08-03 17:16:58 -07:00
checkpatch.pl checkpatch: add constant comparison on left side test 2015-09-10 13:29:01 -07:00
checkstack.pl Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-10-07 21:16:26 -04:00
checksyscalls.sh x86/asm/entry: Move the arch/x86/syscalls/ definitions to arch/x86/entry/syscalls/ 2015-06-04 07:37:37 +02:00
checkversion.pl
cleanfile
cleanpatch
coccicheck Coccinelle: Update information about the minimal version required 2013-07-03 22:58:20 +02:00
config kbuild: trivial - remove trailing empty lines 2014-06-10 00:04:06 +02:00
conmakehash.c kbuild: trivial - remove trailing spaces 2014-04-30 17:34:32 +02:00
decode_stacktrace.sh scripts: decode_stacktrace: fix ARM architecture decoding 2015-09-04 16:54:41 -07:00
decodecode scripts/decodecode: make faulting insn ptr more robust 2013-04-29 15:54:27 -07:00
depmod.sh depmod: pass -P $CONFIG_SYMBOL_PREFIX 2013-02-22 11:52:31 +01:00
diffconfig vfs,ext2: remove CONFIG_EXT2_FS_XIP and rename CONFIG_FS_XIP to CONFIG_FS_DAX 2015-02-16 17:56:04 -08:00
docproc.c kbuild: trivial - use tabs for code indent where possible 2014-06-10 14:00:53 +02:00
export_report.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
extract-cert.c KEYS: Remove unnecessary header #inclusions from extract-cert.c 2015-09-25 16:31:45 +01:00
extract-ikconfig scripts/extract-ikconfig: Support LZ4-compressed images. 2015-04-15 14:01:12 +02:00
extract-vmlinux scripts: add extract-vmlinux 2011-08-31 16:12:17 +02:00
gcc-goto.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-ld kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-version.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-x86_32-has-stack-protector.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-x86_64-has-stack-protector.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gen_initramfs_list.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
get_maintainer.pl get_maintainer: fix perl 5.22/5.24 deprecated/incompatible "\C" use 2015-06-25 17:00:39 -07:00
gfp-translate chmod +x scripts/gfp-translate 2012-06-27 12:44:29 -07:00
headerdep.pl
headers_check.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
headers_install.sh Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2014-10-14 09:22:26 +02:00
headers.sh CRIS: Fix headers_install 2014-12-20 00:01:12 +01:00
kallsyms.c Kbuild: kallsyms: drop special handling of pre-3.0 GCC symbols 2015-04-07 13:04:51 +02:00
Kbuild.include Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2015-09-08 14:12:19 -07:00
kernel-doc kerneldoc: Convert error messages to GNU error message format 2015-09-04 16:54:41 -07:00
kernel-doc-xml-ref scripts/kernel-doc: Adding cross-reference links to html documentation. 2015-08-16 22:11:16 -06:00
ld-version.sh Kbuild, lto: add ld-version and ld-ifversion macros 2014-02-13 20:25:00 -08:00
Lindent scripts/Lindent: handle missing indent gracefully 2015-09-04 16:54:41 -07:00
link-vmlinux.sh scripts: link-vmlinux: Don't pass page offset to kallsyms if XIP Kernel 2015-05-21 19:17:44 +08:00
Makefile modsign: Use extract-cert to process CONFIG_SYSTEM_TRUSTED_KEYS 2015-08-12 17:01:01 +01:00
Makefile.asm-generic kbuild: trivial - remove trailing empty lines 2014-06-10 00:04:06 +02:00
Makefile.build ftrace: allow architectures to specify ftrace compile options 2015-01-29 09:19:19 +01:00
Makefile.clean Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2015-02-19 10:07:08 -08:00
Makefile.dtbinst kbuild: include $(src)/Makefile rather than $(obj)/Makefile 2015-04-02 16:42:08 +02:00
Makefile.extrawarn kbuild: Fix clang detection 2015-09-04 13:14:10 +02:00
Makefile.fwinst kbuild: include $(src)/Makefile rather than $(obj)/Makefile 2015-04-02 16:42:08 +02:00
Makefile.headersinst kbuild: collect shorthands into scripts/Kbuild.include 2014-11-26 14:36:52 +01:00
Makefile.help
Makefile.host kbuild: handle the dependency of multi-objs hostprogs appropriately 2014-08-19 10:26:20 +02:00
Makefile.kasan arm64: add KASAN support 2015-10-12 17:46:36 +01:00
Makefile.lib kbuild: Create directory for target DTB 2015-04-03 13:52:28 -07:00
Makefile.modbuiltin
Makefile.modinst modsign: Abort modules_install when signing fails 2015-08-07 16:26:13 +01:00
Makefile.modpost modpost: Optionally ignore secondary errors seen if a single module build fails 2013-09-23 15:45:03 +09:30
Makefile.modsign modsign: lookup lines ending in .ko in .mod files 2014-08-27 21:54:11 +09:30
makelst
markup_oops.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
mkcompile_h kbuild: trivial - remove trailing spaces 2014-04-30 17:34:32 +02:00
mkmakefile kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
mksysmap mksysmap: Add h8300 local symbol pattern 2015-06-23 13:35:47 +09:00
mkuboot.sh
mkversion
module-common.lds kernel: add support for .init_array.* constructors 2015-02-13 21:21:42 -08:00
namespace.pl
objdiff scripts: objdiff: support directories for the augument of record command 2014-06-10 14:59:33 +02:00
patch-kernel kbuild: trivial - remove trailing spaces 2014-04-30 17:34:32 +02:00
pnmtologo.c kbuild: trivial - remove trailing empty lines 2014-06-10 00:04:06 +02:00
profile2linkerlist.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
recordmcount.c s390/ftrace,kprobes: allow to patch first instruction 2014-10-27 13:27:27 +01:00
recordmcount.h recordmcount/MIPS: Fix possible incorrect mcount_loc table entries in modules 2014-06-26 10:48:19 +01:00
recordmcount.pl Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2015-02-11 17:42:32 -08:00
setlocalversion Fix detectition of kernel git repository in setlocalversion script [take #2] 2014-01-03 14:48:42 +01:00
show_delta kbuild: trivial - remove trailing empty lines 2014-06-10 00:04:06 +02:00
sign-file.c MODSIGN: Change from CMS to PKCS#7 signing if the openssl is too old 2015-09-25 16:31:46 +01:00
sortextable.c ARCv2: extable: Enable sorting at build time 2015-06-22 14:06:56 +05:30
sortextable.h scripts/sortextable: suppress warning: `relocs_size' may be used uninitialized 2014-10-14 02:18:23 +02:00
spelling.txt scripts/spelling.txt: add some typo-words 2015-09-04 16:54:41 -07:00
stackdelta scripts: add stackdelta script 2015-08-28 17:04:40 +02:00
stackusage scripts: add stackusage script 2015-08-28 17:04:40 +02:00
tags.sh Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2015-09-08 14:23:13 -07:00
unifdef.c
ver_linux
xen-hypercalls.sh xen: build infrastructure for generating hypercall depending symbols 2015-03-16 14:49:13 +00:00
xz_wrap.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00