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Masahiro Yamada 7aa910df07 modpost: fix undefined behavior of is_arm_mapping_symbol() 
[ Upstream commit d6b732666a ]

The return value of is_arm_mapping_symbol() is unpredictable when "$"
is passed in.

strchr(3) says:
  The strchr() and strrchr() functions return a pointer to the matched
  character or NULL if the character is not found. The terminating null
  byte is considered part of the string, so that if c is specified as
  '\0', these functions return a pointer to the terminator.

When str[1] is '\0', strchr("axtd", str[1]) is not NULL, and str[2] is
referenced (i.e. buffer overrun).

Test code
---------

  char str1[] = "abc";
  char str2[] = "ab";

  strcpy(str1, "$");
  strcpy(str2, "$");

  printf("test1: %d\n", is_arm_mapping_symbol(str1));
  printf("test2: %d\n", is_arm_mapping_symbol(str2));

Result
------

  test1: 0
  test2: 1

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-14 16:52:40 +02:00
..
basic
fixdep: faster CONFIG_ search
2016-08-24 22:34:19 +02:00
coccinelle
fs: stream_open - opener for stream-like files so that read and write can run simultaneously without deadlock
2019-06-11 12:22:49 +02:00
dtc
scripts/dtc: dtx_diff: remove broken example from help text
2022-01-27 08:47:42 +01:00
gcc-plugins
gcc-plugins: latent_entropy: use /dev/urandom
2022-04-20 09:06:46 +02:00
gdb
scripts/gdb: fix lx-version string output
2021-01-12 19:49:03 +01:00
genksyms
kbuild: Regenerate genksyms lexer
2016-08-25 20:03:51 +02:00
kconfig
kconfig: nconf: stop endless search loops
2021-05-22 10:40:30 +02:00
ksymoops
…
mod
modpost: fix undefined behavior of is_arm_mapping_symbol()
2022-06-14 16:52:40 +02:00
package
builddeb: Fix header package regarding dtc source links
2018-05-30 07:50:39 +02:00
selinux
selinux: explicitly declare the role "base_r"
2015-07-13 13:32:00 -04:00
tracing
scripts/tracing: fix the bug that can't parse raw_trace_func
2021-08-15 13:01:03 +02:00
.gitignore
KEYS: Reserve an extra certificate symbol for inserting without recompiling
2016-02-26 15:30:20 +00:00
adjust_autoksyms.sh
kbuild: make scripts/adjust_autoksyms.sh robust against timestamp races
2018-05-30 07:50:37 +02:00
analyze_suspend.py
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
asn1_compiler.c
ASN.1: fix open failure check on headername
2016-04-06 14:06:48 +01:00
bloat-o-meter
scripts: switch explicitly to Python 3
2021-06-03 08:23:27 +02:00
bootgraph.pl
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
check_extable.sh
scripts: add check_extable.sh script.
2015-04-13 21:03:02 +09:30
check-lc_ctype.c
DocBook: Use a fixed encoding for output
2015-09-28 01:31:48 -06:00
checkincludes.pl
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
checkkconfigsymbols.py
checkkconfigsymbols: use arglist instead of cmd string
2016-08-28 11:08:34 +02:00
checkpatch.pl
checkpatch: fix unescaped left brace
2020-12-29 13:45:01 +01:00
checkstack.pl
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
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: fix parallel build with CHECK=scripts/coccicheck
2017-12-14 09:28:22 +01:00
config
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
conmakehash.c
kbuild: trivial - remove trailing spaces
2014-04-30 17:34:32 +02:00
const_structs.checkpatch
const_structs.checkpatch: add frequently used from Julia Lawall's list
2016-10-11 15:06:30 -07:00
decode_stacktrace.sh
scripts/decode_stacktrace: strip basepath from all paths
2020-07-31 16:44:03 +02:00
decodecode
scripts/decodecode: fix trapping instruction formatting
2020-05-20 08:15:29 +02:00
depmod.sh
depmod: handle the case of /sbin/depmod without /sbin in PATH
2021-01-12 19:49:01 +01:00
diffconfig
scripts: switch explicitly to Python 3
2021-06-03 08:23:27 +02:00
docproc.c
docproc: print a comment about autogeneration for rst output
2016-05-14 09:56:56 -06:00
export_report.pl
kbuild: Make scripts executable
2014-08-20 16:03:45 +02:00
extract_xc3028.pl
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +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-module-sig.pl
KEYS: Provide a script to extract a module signature
2015-10-21 15:18:36 +01:00
extract-sys-certs.pl
KEYS: Use the symbol value for list size, updated by scripts/insert-sys-cert
2016-02-26 15:32:05 +00:00
extract-vmlinux
…
faddr2line
scripts/faddr2line: improve on base path filtering a bit
2016-09-19 14:49:08 -07:00
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-plugin.sh
gcc-plugins: abort builds cleanly when not supported
2016-08-08 17:49:05 -07:00
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
scripts/has-stack-protector: add -fno-PIE
2016-11-09 22:28:05 +01:00
gen_initramfs_list.sh
initramfs: Escape colons in depfile
2016-09-23 10:35:32 +02:00
get_dvb_firmware
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
get_maintainer.pl
get_maintainer: quiet noisy implicit -f vcs_file_exists checking
2016-08-26 17:39:34 -07:00
gfp-translate
…
headerdep.pl
…
headers_check.pl
headers_check: don't warn about c++ guards
2016-05-24 14:12:48 +10:00
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
insert-sys-cert.c
KEYS: Reserve an extra certificate symbol for inserting without recompiling
2016-02-26 15:30:20 +00:00
kallsyms.c
scripts/kallsyms: fix definitely-lost memory leak
2020-01-04 13:41:02 +01:00
Kbuild.include
kbuild: improve cc-option to clean up all temporary files
2020-06-30 15:38:43 -04:00
kernel-doc
scripts/kernel-doc: Don't fail with status != 0 if error encountered with -none
2018-02-25 11:05:47 +01:00
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
ld-version: Drop the 4th and 5th version components
2016-05-13 14:02:05 +02:00
Lindent
scripts/Lindent: handle missing indent gracefully
2015-09-04 16:54:41 -07:00
link-vmlinux.sh
kbuild: allow architectures to use thin archives instead of ld -r
2016-09-09 10:31:19 +02:00
Makefile
scripts: set proper OpenSSL include dir also for sign-file
2021-03-07 11:25:55 +01:00
Makefile.asm-generic
kbuild: Remove stale asm-generic wrappers
2016-07-07 15:58:45 +02:00
Makefile.build
tracing: Avoid calling cc-option -mrecord-mcount for every Makefile
2021-02-23 13:59:17 +01:00
Makefile.clean
Shared library support
2016-06-07 22:57:10 +02:00
Makefile.dtbinst
dtbsinstall: don't move target directory out of the way
2016-01-28 11:40:32 +01:00
Makefile.extrawarn
Makefile.extrawarn: Move -Wunaligned-access to W=1
2022-02-23 11:56:38 +01:00
Makefile.fwinst
kbuild: include $(src)/Makefile rather than $(obj)/Makefile
2015-04-02 16:42:08 +02:00
Makefile.gcc-plugins
gcc-plugins: Add latent_entropy plugin
2016-10-10 14:51:44 -07:00
Makefile.headersinst
kbuild: collect shorthands into scripts/Kbuild.include
2014-11-26 14:36:52 +01:00
Makefile.help
…
Makefile.host
kbuild: Add __cc-option macro
2018-11-23 08:20:35 +01:00
Makefile.kasan
kasan: don't emit builtin calls when sanitization is off
2018-08-17 20:59:29 +02:00
Makefile.lib
kbuild: fix asm-offset generation to work with clang
2018-11-23 08:20:35 +01:00
Makefile.modbuiltin
…
Makefile.modinst
modsign: Abort modules_install when signing fails
2015-08-07 16:26:13 +01:00
Makefile.modpost
kbuild: modpost: handle KBUILD_EXTRA_SYMBOLS only for external modules
2019-08-25 10:51:47 +02:00
Makefile.modsign
modsign: lookup lines ending in .ko in .mod files
2014-08-27 21:54:11 +09:30
Makefile.ubsan
Kbuild: enable -Wmaybe-uninitialized warning for "make W=1"
2016-11-11 08:45:08 -08:00
makelst
…
markup_oops.pl
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
mkcompile_h
kbuild: mkcompile_h: consider timestamp if KBUILD_BUILD_TIMESTAMP is set
2021-07-28 09:14:25 +02:00
mkmakefile
kbuild: Make scripts executable
2014-08-20 16:03:45 +02:00
mksysmap
mksysmap: Fix the mismatch of '.L' symbols in System.map
2020-06-30 15:38:23 -04:00
mkuboot.sh
…
mkversion
…
module-common.lds
objtool, modules: Discard objtool annotation sections for modules
2018-01-17 09:38:58 +01:00
namespace.pl
namespace: fix namespace.pl script to support relative paths
2019-10-29 09:15:06 +01:00
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
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
prune-kernel
scripts: add "prune-kernel" script to clean up old kernel images
2016-02-09 10:09:52 -08:00
recordmcount.c
scripts/recordmcount.{c,pl}: support -ffunction-sections .text.* section names
2021-03-17 16:10:15 +01:00
recordmcount.h
recordmcount: Fix spurious mcount entries on powerpc
2019-08-04 09:33:38 +02:00
recordmcount.pl
recordmcount.pl: fix typo in s390 mcount regex
2022-01-05 12:31:24 +01:00
setlocalversion
scripts/setlocalversion: make git describe output more reliable
2020-11-10 10:23:50 +01:00
show_delta
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
sign-file.c
modsign: Make sign-file determine the format of the X.509 cert
2016-06-14 13:18:33 +01:00
sortextable.c
parisc: Use generic extable search and sort routines
2016-03-23 16:00:46 +01:00
sortextable.h
scripts/sortextable: suppress warning: `relocs_size' may be used uninitialized
2014-10-14 02:18:23 +02:00
spelling.txt
spelling.txt: "modeled" is spelt correctly
2016-10-07 18:46:30 -07:00
stackdelta
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
stackusage
scripts: add stackusage script
2015-08-28 17:04:40 +02:00
tags.sh
tags: honor COMPILED_SOURCE with apart output directory
2018-04-13 19:48:21 +02:00
unifdef.c
unifdef: use memcpy instead of strncpy
2018-12-08 13:05:05 +01:00
ver_linux
ver_linux: rename ver_linux.awk to ver_linux
2016-08-31 13:59:31 +02:00
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