korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-11 04:18:39 +08:00
Code Issues Packages Projects Releases Wiki Activity
7ec2581823
linux/scripts
History
Borislav Petkov (AMD) 7ec2581823 kbuild: Disable KCSAN for autogenerated *.mod.c intermediaries 
[ Upstream commit 54babdc034 ]

When KCSAN and CONSTRUCTORS are enabled, one can trigger the

  "Unpatched return thunk in use. This should not happen!"

catch-all warning.

Usually, when objtool runs on the .o objects, it does generate a section
.return_sites which contains all offsets in the objects to the return
thunks of the functions present there. Those return thunks then get
patched at runtime by the alternatives.

KCSAN and CONSTRUCTORS add this to the object file's .text.startup
section:

  -------------------
  Disassembly of section .text.startup:

  ...

  0000000000000010 <_sub_I_00099_0>:
    10:   f3 0f 1e fa             endbr64
    14:   e8 00 00 00 00          call   19 <_sub_I_00099_0+0x9>
                          15: R_X86_64_PLT32      __tsan_init-0x4
    19:   e9 00 00 00 00          jmp    1e <__UNIQUE_ID___addressable_cryptd_alloc_aead349+0x6>
                          1a: R_X86_64_PLT32      __x86_return_thunk-0x4
  -------------------

which, if it is built as a module goes through the intermediary stage of
creating a <module>.mod.c file which, when translated, receives a second
constructor:

  -------------------
  Disassembly of section .text.startup:

  0000000000000010 <_sub_I_00099_0>:
    10:   f3 0f 1e fa             endbr64
    14:   e8 00 00 00 00          call   19 <_sub_I_00099_0+0x9>
                          15: R_X86_64_PLT32      __tsan_init-0x4
    19:   e9 00 00 00 00          jmp    1e <_sub_I_00099_0+0xe>
                          1a: R_X86_64_PLT32      __x86_return_thunk-0x4

  ...

  0000000000000030 <_sub_I_00099_0>:
    30:   f3 0f 1e fa             endbr64
    34:   e8 00 00 00 00          call   39 <_sub_I_00099_0+0x9>
                          35: R_X86_64_PLT32      __tsan_init-0x4
    39:   e9 00 00 00 00          jmp    3e <__ksymtab_cryptd_alloc_ahash+0x2>
                          3a: R_X86_64_PLT32      __x86_return_thunk-0x4
  -------------------

in the .ko file.

Objtool has run already so that second constructor's return thunk cannot
be added to the .return_sites section and thus the return thunk remains
unpatched and the warning rightfully fires.

Drop KCSAN flags from the mod.c generation stage as those constructors
do not contain data races one would be interested about.

Debugged together with David Kaplan <David.Kaplan@amd.com> and Nikolay
Borisov <nik.borisov@suse.com>.

Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Closes: https://lore.kernel.org/r/0851a207-7143-417e-be31-8bf2b3afb57d@molgen.mpg.de
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Paul Menzel <pmenzel@molgen.mpg.de> # Dell XPS 13
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Reviewed-by: Marco Elver <elver@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-05-17 11:56:05 +02:00
..
atomic Fix up more non-executable files marked executable 2023-02-01 08:34:49 +01:00
basic randstruct: Move seed generation into scripts/basic/ 2022-05-08 01:33:07 -07:00
clang-tools gen_compile_commands: fix invalid escape sequence warning 2024-03-26 18:20:25 -04:00
coccinelle update Coccinelle URL 2022-08-07 21:30:36 +02:00
dtc dt: dt-extract-compatibles: Don't follow symlinks when walking tree 2023-12-13 18:39:05 +01:00
dummy-tools kbuild: dummy-tools: pretend we understand __LONG_DOUBLE_128__ 2022-08-21 02:47:48 +09:00
gcc-plugins gcc-plugins/stackleak: Avoid .head.text section 2024-04-13 13:05:23 +02:00
gdb scripts/gdb: fix lx-timerlist for Python3 2023-05-11 23:03:40 +09:00
genksyms genksyms: adjust the output format to modpost 2022-05-24 16:33:20 +09:00
kconfig kconfig: fix infinite loop when expanding a macro at the end of file 2024-03-26 18:20:58 -04:00
ksymoops
mod modpost: Add '.ltext' and '.ltext.*' to TEXT_SECTIONS 2024-02-23 09:12:38 +01:00
package kbuild: rpm-pkg: define _arch conditionally 2023-09-19 12:27:58 +02:00
selinux selinux: remove runtime disable message in the install_policy.sh script 2022-09-20 14:12:25 -04:00
tracing ftrace/scripts: Update the instructions for ftrace-bisect.sh 2023-02-01 08:34:37 +01:00
.gitignore scripts: add generate_rust_target.rs 2022-09-28 09:02:06 +02:00
adjust_autoksyms.sh kbuild: split the second line of *.mod into *.usyms 2022-05-08 03:16:59 +09:00
as-version.sh kbuild: Update assembler calls to use proper flags and language target 2023-06-21 16:01:03 +02:00
asn1_compiler.c ASN.1: Fix check for strdup() success 2023-04-26 14:28:44 +02:00
bin2c.c
bloat-o-meter scripts/bloat-o-meter: add -p argument 2022-07-17 17:31:40 -07:00
bootgraph.pl
bpf_doc.py scripts/bpf_doc: Use silent mode when exec make cmd 2024-04-10 16:28:21 +02:00
cc-can-link.sh
cc-version.sh Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
check_extable.sh scripts: check_extable: fix typo in user error message 2021-09-08 11:50:28 -07:00
check-local-export kbuild: rewrite check-local-export in sh/awk 2022-09-29 04:40:15 +09:00
check-sysctl-docs docs: add a script to check sysctl docs 2020-02-25 03:35:16 -07:00
checkdeclares.pl scripts: make some scripts executable 2021-08-10 09:13:25 +09:00
checkincludes.pl
checkkconfigsymbols.py scripts: handle BrokenPipeError for python scripts 2023-03-17 08:50:31 +01:00
checkpatch.pl locking: Introduce __cleanup() based infrastructure 2024-02-23 09:12:51 +01:00
checkstack.pl checkstack: fix printed address 2023-12-13 18:39:19 +01:00
checksyscalls.sh checksyscalls: ignore -Wunused-macros 2022-05-08 03:16:59 +09:00
checkversion.pl scripts: checkversion: modernize linux/version.h search strings 2021-08-05 20:55:39 +09:00
cleanfile
cleanpatch
coccicheck scripts: coccicheck: fix troubles on non-English builds 2021-05-18 11:09:59 +02:00
config kconfig: config script: add a little user help 2021-01-04 10:38:11 +09:00
const_structs.checkpatch const_structs.checkpatch: add frequently used ops structs 2022-01-20 08:52:54 +02:00
decode_stacktrace.sh scripts/decode_stacktrace.sh: optionally use LLVM utilities 2024-01-20 11:50:11 +01:00
decodecode scripts/decodecode: improve faulting line determination 2022-09-11 21:55:05 -07:00
depmod.sh depmod: handle the case of /sbin/depmod without /sbin in PATH 2021-01-01 12:26:39 -08:00
dev-needs.sh scripts/dev-needs: Add script to list device dependencies 2020-09-04 18:19:37 +02:00
diffconfig scripts: handle BrokenPipeError for python scripts 2023-03-17 08:50:31 +01:00
documentation-file-ref-check scripts: documentation-file-ref-check: fix bpf selftests path 2021-10-26 09:42:29 -06:00
export_report.pl modpost: move the namespace field in Module.symvers last 2020-03-17 08:59:03 +09:00
extract_xc3028.pl
extract-ikconfig scripts/extract-ikconfig: add zstd compression support 2022-08-29 13:58:47 +09:00
extract-module-sig.pl
extract-sys-certs.pl
extract-vmlinux
faddr2line scripts/faddr2line: Fix regression in name resolution on ppc64le 2022-11-16 10:42:10 +01:00
file-size.sh
find-unused-docs.sh
gcc-x86_32-has-stack-protector.sh x86/stackprotector/32: Make the canary into a regular percpu variable 2021-03-08 13:19:05 +01:00
gcc-x86_64-has-stack-protector.sh
gen_autoksyms.sh kbuild: Ignore __this_module in gen_autoksyms.sh 2022-06-26 06:15:05 +09:00
gen_ksymdeps.sh kbuild: redo fake deps at include/ksym/*.h 2021-09-03 08:17:21 +09:00
gen-randstruct-seed.sh randstruct: Move seed generation into scripts/basic/ 2022-05-08 01:33:07 -07:00
generate_initcall_order.pl init: lto: ensure initcall ordering 2021-01-14 08:21:09 -08:00
generate_rust_analyzer.py scripts: add generate_rust_analyzer.py 2022-09-28 09:02:06 +02:00
generate_rust_target.rs x86: enable initial Rust support 2022-09-28 09:02:45 +02:00
get_abi.pl scripts/get_abi: fix source path leak 2024-01-31 16:17:01 -08:00
get_dvb_firmware
get_feat.pl scripts: get_feat.pl: use /usr/bin/env to find perl 2022-06-30 12:22:17 -06:00
get_maintainer.pl get_maintainer: Honor mailmap for in file emails 2022-04-29 14:38:00 -07:00
gfp-translate scripts: fix the gfp flags header path in gfp-translate 2023-06-28 11:12:22 +02:00
head-object-list.txt arm64: remove special treatment for the link order of head.o 2023-02-25 11:25:42 +01:00
headerdep.pl
headers_install.sh scripts: headers_install.sh: Update config leak ignore entries 2022-07-27 21:18:00 +09:00
insert-sys-cert.c
install.sh kbuild: factor out the common installation code into scripts/install.sh 2022-05-11 21:45:53 +09:00
is_rust_module.sh scripts: add is_rust_module.sh 2022-09-28 09:02:06 +02:00
jobserver-exec scripts/jobserver-exec: Fix a typo ("envirnoment") 2021-05-17 12:10:03 +09:00
kallsyms.c kallsyms: Reduce the memory occupied by kallsyms_seqs_of_names[] 2023-10-25 12:03:16 +02:00
Kbuild.include kbuild: remove the target in signal traps when interrupted 2022-09-29 02:00:29 +09:00
Kconfig.include kbuild: Update assembler calls to use proper flags and language target 2023-06-21 16:01:03 +02:00
kernel-doc scripts: kernel-doc: Always increment warnings counter 2022-06-13 11:07:45 -06:00
ld-version.sh kbuild: collect minimum tool versions into scripts/min-tool-version.sh 2021-04-25 05:14:26 +09:00
leaking_addresses.pl leaking_addresses: Always print a trailing newline 2021-10-15 11:25:13 +02:00
Lindent
link-vmlinux.sh kbuild: Fix changing ELF file type for output of gen_btf for big endian 2024-02-23 09:12:37 +01:00
Makefile Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
Makefile.asm-generic kbuild: prefix $(srctree)/ to some included Makefiles 2021-03-15 19:20:48 +09:00
Makefile.build kbuild: specify output names separately for each emission type from rustc 2024-05-17 11:55:53 +02:00
Makefile.clang um: Allow builds with Clang 2022-03-21 08:13:03 -07:00
Makefile.clean kbuild: drop $(objtree)/ prefix support for clean-files 2022-05-08 03:17:00 +09:00
Makefile.compiler powerpc: remove checks for binutils older than 2.25 2024-01-25 15:27:18 -08:00
Makefile.debug Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
Makefile.dtbinst kbuild: prefix $(srctree)/ to some included Makefiles 2021-03-15 19:20:48 +09:00
Makefile.extrawarn kbuild: Move -Wenum-{compare-conditional,enum-conversion} into W=1 2024-04-03 15:19:34 +02:00
Makefile.gcc-plugins gcc-plugins: Undefine LATENT_ENTROPY_PLUGIN when plugin disabled for a file 2022-08-16 12:25:53 -07:00
Makefile.headersinst kbuild: prefix $(srctree)/ to some included Makefiles 2021-03-15 19:20:48 +09:00
Makefile.host kbuild: specify output names separately for each emission type from rustc 2024-05-17 11:55:53 +02:00
Makefile.kasan kasan: always respect CONFIG_KASAN_STACK 2021-09-24 16:13:35 -07:00
Makefile.kcov kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled 2020-08-10 01:32:59 +09:00
Makefile.kcsan kcsan: Ignore GCC 11+ warnings about TSan runtime support 2021-12-09 16:42:27 -08:00
Makefile.kmsan kmsan: add KMSAN runtime core 2022-10-03 14:03:19 -07:00
Makefile.lib - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in 2022-10-10 17:53:04 -07:00
Makefile.modfinal kbuild: Disable KCSAN for autogenerated *.mod.c intermediaries 2024-05-17 11:56:05 +02:00
Makefile.modinst kbuild: modinst: Fix build error when CONFIG_MODULE_SIG_KEY is a PKCS#11 URI 2023-02-09 11:28:11 +01:00
Makefile.modpost modpost: propagate W=1 build option to modpost 2024-02-23 09:12:38 +01:00
Makefile.package scripts: add rust in scripts/Makefile.package 2022-11-24 09:27:57 +09:00
Makefile.randstruct randstruct: Enable Clang support 2022-05-08 01:33:07 -07:00
Makefile.ubsan ubsan: remove CONFIG_UBSAN_OBJECT_SIZE 2022-01-20 08:52:55 +02:00
Makefile.userprogs kbuild: add infrastructure to build userspace programs 2020-05-17 18:52:01 +09:00
Makefile.vmlinux kbuild: rebuild .vmlinux.export.o when its prerequisite is updated 2022-10-03 03:52:58 +09:00
Makefile.vmlinux_o kbuild: move modules.builtin(.modinfo) rules to Makefile.vmlinux_o 2022-10-03 03:52:58 +09:00
makelst
markup_oops.pl
min-tool-version.sh scripts/min-tool-version.sh: raise minimum clang version to 15.0.0 for s390 2022-11-09 18:41:16 +01:00
mkcompile_h Revert "kbuild: Make scripts/compile.h when sh != bash" 2022-09-29 04:40:15 +09:00
mksysmap kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols 2022-10-03 03:51:58 +09:00
mkuboot.sh
module.lds.S cfi: Switch to -fsanitize=kcfi 2022-09-26 10:13:13 -07:00
modules-check.sh kbuild: check module name conflict for external modules as well 2021-04-25 05:22:42 +09:00
nsdeps scripts/nsdeps: adjust to the format change of *.mod files 2022-06-08 20:14:13 +09:00
objdiff kbuild: clean .tmp_* pattern by make clean 2022-06-05 06:20:57 +09:00
objdump-func scripts: Create objdump-func helper script 2022-05-12 10:08:43 -07:00
pahole-flags.sh bpf: Add --skip_encoding_btf_inconsistent_proto, --btf_gen_optimized to pahole flags for v1.25 2024-01-20 11:50:10 +01:00
pahole-version.sh kbuild: Add CONFIG_PAHOLE_VERSION 2022-02-02 11:19:33 +01:00
parse-maintainers.pl parse-maintainers: Do not sort section content by default 2020-03-26 15:08:27 -07:00
patch-kernel
profile2linkerlist.pl
prune-kernel scripts/prune-kernel: Use kernel-install if available 2022-05-11 21:46:38 +09:00
recordmcount.c recordmcount: Fix memory leaks in the uwrite function 2023-05-24 17:32:41 +01:00
recordmcount.h recordmcount: Correct st_shndx handling 2021-06-18 09:09:17 -04:00
recordmcount.pl nds32: Remove the architecture 2022-03-07 13:54:59 +01:00
remove-stale-files RISC-V Patches for the 5.20 Merge Window, Part 2 2022-08-12 18:39:43 -07:00
rust_is_available_bindgen_libclang.h scripts: add rust_is_available.sh 2022-09-28 09:02:06 +02:00
rust_is_available.sh kbuild: rust_is_available: fix confusion when a version appears in the path 2023-09-13 09:42:32 +02:00
setlocalversion kbuild: do not quote string values in include/config/auto.conf 2022-01-08 18:03:57 +09:00
show_delta tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
sign-file.c sign-file: Fix incorrect return values check 2023-12-20 17:00:19 +01:00
sorttable.c LoongArch: Add ELF-related definitions 2022-06-03 20:09:27 +08:00
sorttable.h script/sorttable: Fix some initialization problems 2022-01-18 10:17:18 -05:00
spdxcheck-test.sh docs: move Linux logo into a new images folder 2022-06-01 09:32:45 -06:00
spdxcheck.py scripts/spdxcheck: Put excluded files and directories into a separate file 2022-05-18 15:34:33 +02:00
spdxexclude scripts/spdxcheck: Exclude top-level README 2022-05-18 15:35:42 +02:00
spelling.txt scripts/spelling.txt: add more spellings to spelling.txt 2022-03-22 15:57:00 -07:00
sphinx-pre-install scripts: sphinx-pre-install: place a warning for Sphinx >= 3.0 2022-07-07 12:47:34 -06:00
split-man.pl tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
stackdelta
stackusage
subarch.include LoongArch: Add build infrastructure 2022-06-03 20:09:27 +08:00
syscallhdr.sh scripts: check duplicated syscall number in syscall table 2021-07-09 04:00:39 +09:00
syscallnr.sh scripts: make some scripts executable 2021-08-10 09:13:25 +09:00
syscalltbl.sh scripts: check duplicated syscall number in syscall table 2021-07-09 04:00:39 +09:00
tags.sh scripts/tags.sh: Resolve gtags empty index generation 2023-07-05 18:27:38 +01:00
test_fortify.sh fortify: Update compile-time tests for Clang 14 2022-02-13 16:50:06 -08:00
tools-support-relr.sh Makefile: fix GDB warning with CONFIG_RELR 2021-06-08 13:09:34 +01:00
unifdef.c
ver_linux Removed the oprofiled version option 2021-05-03 17:23:06 -06:00
xen-hypercalls.sh scripts: make some scripts executable 2021-08-10 09:13:25 +09:00
xz_wrap.sh kbuild: add variables for compression tools 2020-06-06 23:42:01 +09:00