Linux Kernel https://git.etezian.org/cgit.cgi/linux.git/atom?h=bh1745 2023-02-21T23:17:34+00:00 2023-02-21T23:17:34+00:00 Linus Torvalds torvalds@linux-foundation.org 2023-02-21T23:17:34+00:00 urn:sha1:eb6d5bbea2fbfaade9e29bf5ce4abe3a8384678f Pull m68k updates from Geert Uytterhoeven: - Add seccomp support - defconfig updates - Miscellaneous fixes and improvements * tag 'm68k-for-v6.3-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k: /proc/hardware should depend on PROC_FS selftests/seccomp: Add m68k support m68k: Add kernel seccomp support m68k: Check syscall_trace_enter() return code m68k: defconfig: Update defconfigs for v6.2-rc3 m68k: q40: Do not initialise statics to 0 2023-01-30T15:40:15+00:00 Michael Schmitz schmitzmic@gmail.com 2023-01-12T03:55:28+00:00 urn:sha1:6baaade15594b28195da369962208b1f658e7342 Add secure_computing() call to syscall_trace_enter to actually filter system calls. Add necessary arch Kconfig options, define TIF_SECCOMP trace flag and provide basic seccomp filter support in asm/syscall.h syscall_get_nr currently uses the syscall nr stored in orig_d0 because we change d0 to a default return code before starting a syscall trace. This may be inconsistent with syscall_rollback copying orig_d0 to d0 (which we never check upon return from trace). We use d0 for the return code from syscall_trace_enter in entry.S currently, and could perhaps expand that to store a new syscall number returned by the seccomp filter before executing the syscall. This clearly needs some discussion. seccomp_bpf self test on ARAnyM passes 81 out of 94 tests. Signed-off-by: Michael Schmitz <schmitzmic@gmail.com> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Link: https://lore.kernel.org/r/20230112035529.13521-3-schmitzmic@gmail.com Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> 2023-01-30T15:40:15+00:00 Michael Schmitz schmitzmic@gmail.com 2023-01-12T03:55:27+00:00 urn:sha1:2ca8a1de4437f21562e57f9ac123914747a8e7a1 Check return code of syscall_trace_enter(), and skip syscall if -1. Return code will be left at what had been set by ptrace or seccomp (in regs->d0). No regression seen in testing with strace on ARAnyM. Signed-off-by: Michael Schmitz <schmitzmic@gmail.com> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Link: https://lore.kernel.org/r/20230112035529.13521-2-schmitzmic@gmail.com Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> 2023-01-13T10:48:15+00:00 Peter Zijlstra peterz@infradead.org 2023-01-12T19:43:31+00:00 urn:sha1:2b5a0e425e6e319b1978db1e9564f6af4228a567 Idle code is very like entry code in that RCU isn't available. As such, add a little validation. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Tested-by: Tony Lindgren <tony@atomide.com> Tested-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lore.kernel.org/r/20230112195540.373461409@infradead.org 2022-12-20T14:56:35+00:00 Linus Torvalds torvalds@linux-foundation.org 2022-12-20T14:56:35+00:00 urn:sha1:b6bb9676f2165d518b35ba3bea5f1fcfc0d969bf Pull m68knommu update from Greg Ungerer: "Only a single change to use the safer strscpy() instead of strncpy() when setting up the cmdline" * tag 'm68knommu-for-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68k: use strscpy() to instead of strncpy() 2022-12-04T23:07:21+00:00 Xu Panda xu.panda@zte.com.cn 2022-12-03T06:10:56+00:00 urn:sha1:af5d74e32eb8e1b833f687047f0ffe3801d7229d The implementation of strscpy() is more robust and safer. Signed-off-by: Xu Panda <xu.panda@zte.com.cn> Signed-off-by: Yang Yang <yang.yang29@zte.com> Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> 2022-11-25T04:24:23+00:00 Al Viro viro@zeniv.linux.org.uk 2022-09-04T00:23:56+00:00 urn:sha1:bdbadfcc37c5c8f9f2a401a18eae71b0c28799ee Don't bother with pointless macros - we are not sharing it with aout coredumps anymore. Just convert the underlying functions to the same arguments (nobody uses regs, actually) and call them elf_core_copy_task_fpregs(). And unexport the entire bunch, while we are at it. [added missing includes in arch/{csky,m68k,um}/kernel/process.c to avoid extra warnings about the lack of externs getting added to huge piles for those files. Pointless, but...] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 2022-10-10T19:00:45+00:00 Linus Torvalds torvalds@linux-foundation.org 2022-10-10T19:00:45+00:00 urn:sha1:8afc66e8d43be8edcf442165b70d50dd33091e68 Pull Kbuild updates from Masahiro Yamada: - Remove potentially incomplete targets when Kbuid is interrupted by SIGINT etc in case GNU Make may miss to do that when stderr is piped to another program. - Rewrite the single target build so it works more correctly. - Fix rpm-pkg builds with V=1. - List top-level subdirectories in ./Kbuild. - Ignore auto-generated __kstrtab_* and __kstrtabns_* symbols in kallsyms. - Avoid two different modules in lib/zstd/ having shared code, which potentially causes building the common code as build-in and modular back-and-forth. - Unify two modpost invocations to optimize the build process. - Remove head-y syntax in favor of linker scripts for placing particular sections in the head of vmlinux. - Bump the minimal GNU Make version to 3.82. - Clean up misc Makefiles and scripts. * tag 'kbuild-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (41 commits) docs: bump minimal GNU Make version to 3.82 ia64: simplify esi object addition in Makefile Revert "kbuild: Check if linker supports the -X option" kbuild: rebuild .vmlinux.export.o when its prerequisite is updated kbuild: move modules.builtin(.modinfo) rules to Makefile.vmlinux_o zstd: Fixing mixed module-builtin objects kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols kallsyms: take the input file instead of reading stdin kallsyms: drop duplicated ignore patterns from kallsyms.c kbuild: reuse mksysmap output for kallsyms mksysmap: update comment about __crc_* kbuild: remove head-y syntax kbuild: use obj-y instead extra-y for objects placed at the head kbuild: hide error checker logs for V=1 builds kbuild: re-run modpost when it is updated kbuild: unify two modpost invocations kbuild: move vmlinux.o rule to the top Makefile kbuild: move .vmlinux.objs rule to Makefile.modpost kbuild: list sub-directories in ./Kbuild Makefile.compiler: replace cc-ifversion with compiler-specific macros ... 2022-10-02T09:04:05+00:00 Masahiro Yamada masahiroy@kernel.org 2022-09-24T18:19:14+00:00 urn:sha1:3216484550610470013b7ce1c9ed272da0a74589 The objects placed at the head of vmlinux need special treatments: - arch/$(SRCARCH)/Makefile adds them to head-y in order to place them before other archives in the linker command line. - arch/$(SRCARCH)/kernel/Makefile adds them to extra-y instead of obj-y to avoid them going into built-in.a. This commit gets rid of the latter. Create vmlinux.a to collect all the objects that are unconditionally linked to vmlinux. The objects listed in head-y are moved to the head of vmlinux.a by using 'ar m'. With this, arch/$(SRCARCH)/kernel/Makefile can consistently use obj-y for builtin objects. There is no *.o that is directly linked to vmlinux. Drop unneeded code in scripts/clang-tools/gen_compile_commands.py. $(AR) mPi needs 'T' to workaround the llvm-ar bug. The fix was suggested by Nathan Chancellor [1]. [1]: https://lore.kernel.org/llvm/YyjjT5gQ2hGMH0ni@dev-arch.thelio-3990X/ Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu> 2022-09-28T20:16:44+00:00 Jason A. Donenfeld Jason@zx2c4.com 2022-09-27T13:08:35+00:00 urn:sha1:dc63a086daee92c63e392e4e7cd7ed61f3693026 This is useful on !virt platforms for kexec, so change things from BI_VIRT_RNG_SEED to be BI_RNG_SEED, and simply remove BI_VIRT_RNG_SEED because it only ever lasted one release, and nothing is broken by not having it. At the same time, keep a comment noting that it's been removed, so that ID isn't reused. In addition, we previously documented 2-byte alignment, but 4-byte alignment is actually necessary, so update that comment. Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org> Fixes: a1ee38ab1a75 ("m68k: virt: Use RNG seed from bootinfo block") Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Link: https://lore.kernel.org/r/20220927130835.1629806-2-Jason@zx2c4.com Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>