When COMPILED_SOURCE is set, running
make ARCH=x86_64 COMPILED_SOURCE=1 cscope tags
could throw the following errors:
scripts/tags.sh: line 98: /usr/bin/realpath: Argument list too long
cscope: no source files found
scripts/tags.sh: line 98: /usr/bin/realpath: Argument list too long
ctags: No files specified. Try "ctags --help".
This is most likely to happen when the kernel is configured to build a
large number of modules, which has the consequence of passing too many
arguments when calling 'realpath' in 'all_compiled_sources()'.
Let's improve this by invoking 'realpath' through 'xargs', which takes
care of properly limiting the argument list.
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://lore.kernel.org/r/20220516234646.531208-1-cristian.ciocaltea@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Listings of maintainers and people who deserve credits are not really
interesting in terms of copyright. The usage of these files outside of the
kernel is pointless and the file format is trivial. No point in chasing
them or slapping a SPDX identifier into them just because.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kernel configuration files like default configs are machine generated and
pretty useless outside of the kernel context.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The files and directories which are excluded from scanning are currently
hard coded in the script. That's not maintainable and not accessible for
external tools.
Move the files and directories which should be excluded into a file. The
default file is scripts/spdxexclude. This can be overridden with the
'-e $FILE' command line option.
The file format and syntax is similar to the .gitignore file.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Makes life easier when chasing the missing ones. Is activated with '-f'
on the command line.
# scripts/spdxcheck.py -f kernel/
Files without SPDX:
./kernel/cpu.c
./kernel/kmod.c
./kernel/relay.c
./kernel/bpf/offload.c
./kernel/bpf/preload/.gitignore
./kernel/bpf/preload/iterators/README
./kernel/bpf/ringbuf.c
./kernel/cgroup/cgroup.c
./kernel/cgroup/cpuset.c
./kernel/cgroup/legacy_freezer.c
./kernel/debug/debug_core.h
./kernel/debug/kdb/Makefile
./kernel/debug/kdb/kdb_bp.c
./kernel/debug/kdb/kdb_bt.c
./kernel/debug/kdb/kdb_cmds
./kernel/debug/kdb/kdb_debugger.c
./kernel/debug/kdb/kdb_io.c
./kernel/debug/kdb/kdb_keyboard.c
./kernel/debug/kdb/kdb_main.c
./kernel/debug/kdb/kdb_private.h
./kernel/debug/kdb/kdb_support.c
./kernel/locking/lockdep_states.h
./kernel/locking/mutex-debug.c
./kernel/locking/spinlock_debug.c
./kernel/sched/pelt.h
With the optional -D parameter the directory depth can be limited:
# scripts/spdxcheck.py -f -D 0 kernel/
Files without SPDX:
./kernel/cpu.c
./kernel/kmod.c
./kernel/relay.c
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add functionality to display [sub]directory statistics. This is enabled by
adding '-d' to the command line. The optional -D parameter allows to limit
the directory depth. If supplied the subdirectories are accumulated
# scripts/spdxcheck.py -d kernel/
Incomplete directories: SPDX in Files
./kernel : 111 of 114 97%
./kernel/bpf : 43 of 45 95%
./kernel/bpf/preload : 4 of 5 80%
./kernel/bpf/preload/iterators : 4 of 5 80%
./kernel/cgroup : 10 of 13 76%
./kernel/configs : 0 of 9 0%
./kernel/debug : 3 of 4 75%
./kernel/debug/kdb : 1 of 11 9%
./kernel/locking : 29 of 32 90%
./kernel/sched : 38 of 39 97%
The result can be accumulated by restricting the depth via the new command
line option '-d $DEPTH':
# scripts/spdxcheck.py -d -D1
Incomplete directories: SPDX in Files
./ : 6 of 13 46%
./Documentation : 4096 of 8451 48%
./arch : 13476 of 16402 82%
./block : 100 of 101 99%
./certs : 11 of 14 78%
./crypto : 145 of 176 82%
./drivers : 24682 of 30745 80%
./fs : 1876 of 2110 88%
./include : 5175 of 5757 89%
./ipc : 12 of 13 92%
./kernel : 493 of 527 93%
./lib : 393 of 524 75%
./mm : 151 of 159 94%
./net : 1713 of 1900 90%
./samples : 211 of 273 77%
./scripts : 341 of 435 78%
./security : 241 of 250 96%
./sound : 2438 of 2503 97%
./tools : 3810 of 5462 69%
./usr : 9 of 10 90%
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
With all randstruct exceptions removed, remove all the exception
handling code. Any future warnings are likely to be shared between
this plugin and Clang randstruct, and will need to be addressed in a
more wholistic fashion.
Cc: Christoph Hellwig <hch@infradead.org>
Cc: linux-hardening@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
The randstruct GCC plugin gets upset when it sees struct path (which is
randomized) being assigned from a "void *" (which it cannot type-check).
There's no need for these casts, as the entire internal payload use is
following a normal struct layout. Convert the enum-based void * offset
dereferencing to the new big_key_payload struct. No meaningful machine
code changes result after this change, and source readability is improved.
Drop the randstruct exception now that there is no "confusing" cross-type
assignment.
Cc: David Howells <dhowells@redhat.com>
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: linux-hardening@vger.kernel.org
Cc: keyrings@vger.kernel.org
Cc: linux-security-module@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
There have been some recent reports of faddr2line failures:
$ scripts/faddr2line sound/soundcore.ko sound_devnode+0x5/0x35
bad symbol size: base: 0x0000000000000000 end: 0x0000000000000000
$ ./scripts/faddr2line vmlinux.o enter_from_user_mode+0x24
bad symbol size: base: 0x0000000000005fe0 end: 0x0000000000005fe0
The problem is that faddr2line is based on 'nm', which has a major
limitation: it doesn't know how to distinguish between different text
sections. So if an offset exists in multiple text sections in the
object, it may fail.
Rewrite faddr2line to be section-aware, by basing it on readelf.
Fixes: 67326666e2 ("scripts: add script for translating stack dump function offsets")
Reported-by: Kaiwan N Billimoria <kaiwan.billimoria@gmail.com>
Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://lore.kernel.org/r/29ff99f86e3da965b6e46c1cc2d72ce6528c17c3.1652382321.git.jpoimboe@kernel.org
There were more EXPORT_SYMBOL types in the past. The following commits
removed unused ones.
- f1c3d73e97 ("module: remove EXPORT_SYMBOL_GPL_FUTURE")
- 367948220f ("module: remove EXPORT_UNUSED_SYMBOL*")
There are 3 remaining in enum export, but export_unknown does not make
any sense because we never expect such a situation like "we do not know
how it was exported".
If the symbol name starts with "__ksymtab_", but the section name
does not start with "___ksymtab+" or "___ksymtab_gpl+", it is not an
exported symbol.
It occurs when a variable starting with "__ksymtab_" is directly defined:
int __ksymtab_foo;
Presumably, there is no practical issue for using such a weird variable
name (but there is no good reason for doing so, either).
Anyway, that is not an exported symbol. Setting export_unknown is not
the right thing to do. Do not call sym_add_exported() in this case.
With pointless export_unknown removed, the export type finally becomes
boolean (either EXPORT_SYMBOL or EXPORT_SYMBOL_GPL).
I renamed the field name to is_gpl_only. EXPORT_SYMBOL_GPL sets it true.
Only GPL-compatible modules can use it.
I removed the orphan comment, "How a symbol is exported", which is
unrelated to sec_mismatch_count. It is about enum export.
See commit bd5cbcedf4 ("kbuild: export-type enhancement to modpost.c")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Tested-by: Nathan Chancellor <nathan@kernel.org>
This is a remnant of commit 6543becf26 ("mod/file2alias: make
modalias generation safe for cross compiling").
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
When CONFIG_MODVERSIONS=y, the output from genksyms is saved in
separate *.symversions files, and will be used much later when
CONFIG_LTO_CLANG=y because it is impossible to update LLVM bit code
here.
This approach is not robust because:
- *.symversions may or may not exist. If *.symversions does not
exist, we never know if it is missing for legitimate reason
(i.e. no EXPORT_SYMBOL) or something bad has happened (for
example, the user accidentally deleted it). Once it occurs,
it is not self-healing because *.symversions is generated
as a side effect.
- stale (i.e. invalid) *.symversions might be picked up if an
object is generated in a non-ordinary way, and corresponding
*.symversions (, which was generated by old builds) just happen
to exist.
A more robust approach is to save symbol versions in *.cmd files
because:
- *.cmd always exists (if the object is generated by if_changed
rule or friends). Even if the user accidentally deletes it,
it will be regenerated in the next build.
- *.cmd is always re-generated when the object is updated. This
avoid stale version information being picked up.
I will remove *.symversions later.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Nicolas Schier <nicolas@fjasle.eu>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Tested-by: Nathan Chancellor <nathan@kernel.org>
A *.mod file lists the member objects of a module, but vmlinux does
not have such a file.
Generate this list to allow modpost to know all the member objects.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Tested-by: Nathan Chancellor <nathan@kernel.org>
A later commit will add more code to this list_for_each_entry loop.
Before that, move the loop body into a separate helper function.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Tested-by: Nathan Chancellor <nathan@kernel.org>
add_intree_flag(), add_retpoline(), and add_staging_flag() are small
enough to be merged into add_header().
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Tested-by: Nathan Chancellor <nathan@kernel.org>
If the new-kernel-pkg utility isn't present, try using kernel-install.
This is what the %preun scriptlet in scripts/package/mkspec does too.
Signed-off-by: Reza Arbab <arbab@linux.ibm.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
