user/sven/linux.git/kernel/Makefile, branch v6.17

Merge tag 'kbuild-v6.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2025-08-06T04:32:52Z

Pull Kbuild updates from Masahiro Yamada: "This is the last pull request from me. I'm grateful to have been able to continue as a maintainer for eight years. From the next cycle, Nathan and Nicolas will maintain Kbuild. - Fix a shortcut key issue in menuconfig - Fix missing rebuild of kheaders - Sort the symbol dump generated by gendwarfsyms - Support zboot extraction in scripts/extract-vmlinux - Migrate gconfig to GTK 3 - Add TAR variable to allow overriding the default tar command - Hand over Kbuild maintainership" * tag 'kbuild-v6.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (92 commits) MAINTAINERS: hand over Kbuild maintenance kheaders: make it possible to override TAR kbuild: userprogs: use correct linker when mixing clang and GNU ld kconfig: lxdialog: replace strcpy() with strncpy() in inputbox.c kconfig: lxdialog: replace strcpy with snprintf in print_autowrap kconfig: gconf: refactor text_insert_help() kconfig: gconf: remove unneeded variable in text_insert_msg kconfig: gconf: use hyphens in signals kconfig: gconf: replace GtkImageMenuItem with GtkMenuItem kconfig: gconf: Fix Back button behavior kconfig: gconf: fix single view to display dependent symbols correctly scripts: add zboot support to extract-vmlinux gendwarfksyms: order -T symtypes output by name gendwarfksyms: use preferred form of sizeof for allocation kconfig: qconf: confine {begin,end}Group to constructor and destructor kconfig: qconf: fix ConfigList::updateListAllforAll() kconfig: add a function to dump all menu entries in a tree-like format kconfig: gconf: show GTK version in About dialog kconfig: gconf: replace GtkHPaned and GtkVPaned with GtkPaned kconfig: gconf: replace GdkColor with GdkRGBA ...

Merge tag 'trace-deferred-unwind-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2025-08-01T16:46:24Z

Pull initial deferred unwind infrastructure from Steven Rostedt: "This is the core infrastructure for the deferred unwinder that is required for sframes[1]. Several other patch series are based on this work although those patch series are not dependent on each other. In order to simplify the development, having this core series upstream will allow the other series to be worked on in parallel. The other series are: - The two patches to implement x86 support [2] [3] - The s390 work [4] - The perf work [5] - The ftrace work [6] - The sframe work [7] And more is on the way. The core infrastructure adds the following in kernel APIs: - int unwind_user_faultable(struct unwind_stacktrace *trace); Performs a user space stack trace that may fault user pages in. - int unwind_deferred_init(struct unwind_work *work, unwind_callback_t func); Allows a tracer to register with the unwind deferred infrastructure. - int unwind_deferred_request(struct unwind_work *work, u64 *cookie); Used when a tracer request a deferred trace. Can be called from interrupt or NMI context. - void unwind_deferred_cancel(struct unwind_work *work); Called by a tracer to unregister from the deferred unwind infrastructure. - void unwind_deferred_task_exit(struct task_struct *task); Called by task exit code to flush any pending unwind requests. - void unwind_task_init(struct task_struct *task); Called by do_fork() to initialize the task struct for the deferred unwinder. - void unwind_task_free(struct task_struct *task); Called by do_exit() to free up any resources used by the deferred unwinder. None of the above is actually compiled unless an architecture enables it, which none currently do" Link: https://sourceware.org/binutils/wiki/sframe [1] Link: https://lore.kernel.org/linux-trace-kernel/20250717004958.260781923@kernel.org/ [2] Link: https://lore.kernel.org/linux-trace-kernel/20250717004958.432327787@kernel.org/ [3] Link: https://lore.kernel.org/linux-trace-kernel/20250710163522.3195293-1-jremus@linux.ibm.com/ [4] Link: https://lore.kernel.org/linux-trace-kernel/20250718164119.089692174@kernel.org/ [5] Link: https://lore.kernel.org/linux-trace-kernel/20250424192612.505622711@goodmis.org/ [6] Link: https://lore.kernel.org/linux-trace-kernel/20250717012848.927473176@kernel.org/ [7] * tag 'trace-deferred-unwind-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: unwind: Finish up unwind when a task exits unwind deferred: Use SRCU unwind_deferred_task_work() unwind: Add USED bit to only have one conditional on way back to user space unwind deferred: Add unwind_completed mask to stop spurious callbacks unwind deferred: Use bitmask to determine which callbacks to call unwind_user/deferred: Make unwind deferral requests NMI-safe unwind_user/deferred: Add deferred unwinding interface unwind_user/deferred: Add unwind cache unwind_user/deferred: Add unwind_user_faultable() unwind_user: Add user space unwinding API with frame pointer support

Merge tag 'bpf-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

2025-07-30T16:58:50Z

Pull bpf updates from Alexei Starovoitov: - Remove usermode driver (UMD) framework (Thomas Weißschuh) - Introduce Strongly Connected Component (SCC) in the verifier to detect loops and refine register liveness (Eduard Zingerman) - Allow 'void *' cast using bpf_rdonly_cast() and corresponding '__arg_untrusted' for global function parameters (Eduard Zingerman) - Improve precision for BPF_ADD and BPF_SUB operations in the verifier (Harishankar Vishwanathan) - Teach the verifier that constant pointer to a map cannot be NULL (Ihor Solodrai) - Introduce BPF streams for error reporting of various conditions detected by BPF runtime (Kumar Kartikeya Dwivedi) - Teach the verifier to insert runtime speculation barrier (lfence on x86) to mitigate speculative execution instead of rejecting the programs (Luis Gerhorst) - Various improvements for 'veristat' (Mykyta Yatsenko) - For CONFIG_DEBUG_KERNEL config warn on internal verifier errors to improve bug detection by syzbot (Paul Chaignon) - Support BPF private stack on arm64 (Puranjay Mohan) - Introduce bpf_cgroup_read_xattr() kfunc to read xattr of cgroup's node (Song Liu) - Introduce kfuncs for read-only string opreations (Viktor Malik) - Implement show_fdinfo() for bpf_links (Tao Chen) - Reduce verifier's stack consumption (Yonghong Song) - Implement mprog API for cgroup-bpf programs (Yonghong Song) * tag 'bpf-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (192 commits) selftests/bpf: Migrate fexit_noreturns case into tracing_failure test suite selftests/bpf: Add selftest for attaching tracing programs to functions in deny list bpf: Add log for attaching tracing programs to functions in deny list bpf: Show precise rejected function when attaching fexit/fmod_ret to __noreturn functions bpf: Fix various typos in verifier.c comments bpf: Add third round of bounds deduction selftests/bpf: Test invariants on JSLT crossing sign selftests/bpf: Test cross-sign 64bits range refinement selftests/bpf: Update reg_bound range refinement logic bpf: Improve bounds when s64 crosses sign boundary bpf: Simplify bounds refinement from s32 selftests/bpf: Enable private stack tests for arm64 bpf, arm64: JIT support for private stack bpf: Move bpf_jit_get_prog_name() to core.c bpf, arm64: Fix fp initialization for exception boundary umd: Remove usermode driver framework bpf/preload: Don't select USERMODE_DRIVER selftests/bpf: Fix test dynptr/test_dynptr_memset_xdp_chunks failure selftests/bpf: Fix test dynptr/test_dynptr_copy_xdp failure selftests/bpf: Increase xdp data size for arm64 64K page size ...

unwind_user: Add user space unwinding API with frame pointer support

2025-07-29T18:46:07Z

Introduce a generic API for unwinding user stacks. In order to expand user space unwinding to be able to handle more complex scenarios, such as deferred unwinding and reading user space information, create a generic interface that all architectures can use that support the various unwinding methods. This is an alternative method for handling user space stack traces from the simple stack_trace_save_user() API. This does not replace that interface, but this interface will be used to expand the functionality of user space stack walking. None of the structures introduced will be exposed to user space tooling. Support for frame pointer unwinding is added. For an architecture to support frame pointer unwinding it needs to enable CONFIG_HAVE_UNWIND_USER_FP and define ARCH_INIT_USER_FP_FRAME. By encoding the frame offsets in struct unwind_user_frame, much of this code can also be reused for future unwinder implementations like sframe. Cc: Masami Hiramatsu Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Jiri Olsa Cc: Arnaldo Carvalho de Melo Cc: Namhyung Kim Cc: Thomas Gleixner Cc: Andrii Nakryiko Cc: Indu Bhagat Cc: "Jose E. Marchesi" Cc: Beau Belgrave Cc: Linus Torvalds Cc: Andrew Morton Cc: Jens Axboe Cc: Florian Weimer Cc: Sam James Link: https://lore.kernel.org/20250729182404.975790139@kernel.org Reviewed-by: Jens Remus Signed-off-by: Josh Poimboeuf Co-developed-by: Mathieu Desnoyers Link: https://lore.kernel.org/all/20250710164301.3094-2-mathieu.desnoyers@efficios.com/ Signed-off-by: Mathieu Desnoyers Co-developed-by: Steven Rostedt (Google) Signed-off-by: Steven Rostedt (Google)

kstack_erase: Add -mgeneral-regs-only to silence Clang warnings

2025-07-26T21:28:35Z

Once CONFIG_KSTACK_ERASE is enabled with Clang on i386, the build warns: kernel/kstack_erase.c:168:2: warning: function with attribute 'no_caller_saved_registers' should only call a function with attribute 'no_caller_saved_registers' or be compiled with '-mgeneral-regs-only' [-Wexcessive-regsave] Add -mgeneral-regs-only for the kstack_erase handler, to make Clang feel better (it is effectively a no-op flag for the kernel). No binary changes encountered. Build & boot tested with Clang 21 on x86_64, and i386. Build tested with GCC 14.2.0 on x86_64, i386, arm64, and arm. Reported-by: Nathan Chancellor Closes: https://lore.kernel.org/all/20250726004313.GA3650901@ax162 Tested-by: Nathan Chancellor Signed-off-by: Kees Cook

umd: Remove usermode driver framework

2025-07-26T19:03:04Z

The code is unused since 98e20e5e13d2 ("bpfilter: remove bpfilter"), therefore remove it. Signed-off-by: Thomas Weißschuh Signed-off-by: Daniel Borkmann Reviewed-by: Christoph Hellwig Reviewed-by: Christian Brauner Acked-by: "Eric W. Biederman" Link: https://lore.kernel.org/bpf/20250721-remove-usermode-driver-v1-2-0d0083334382@linutronix.de

stackleak: Rename STACKLEAK to KSTACK_ERASE

2025-07-22T04:35:01Z

In preparation for adding Clang sanitizer coverage stack depth tracking that can support stack depth callbacks: - Add the new top-level CONFIG_KSTACK_ERASE option which will be implemented either with the stackleak GCC plugin, or with the Clang stack depth callback support. - Rename CONFIG_GCC_PLUGIN_STACKLEAK as needed to CONFIG_KSTACK_ERASE, but keep it for anything specific to the GCC plugin itself. - Rename all exposed "STACKLEAK" names and files to "KSTACK_ERASE" (named for what it does rather than what it protects against), but leave as many of the internals alone as possible to avoid even more churn. While here, also split "prev_lowest_stack" into CONFIG_KSTACK_ERASE_METRICS, since that's the only place it is referenced from. Suggested-by: Ingo Molnar Link: https://lore.kernel.org/r/20250717232519.2984886-1-kees@kernel.org Signed-off-by: Kees Cook

kheaders: rebuild kheaders_data.tar.xz when KBUILD_BUILD_TIMESTAMP is changed

2025-06-24T11:30:37Z

This problem is similar to commit 7f8256ae0efb ("initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP"): kernel/gen_kheaders.sh has an internal dependency on KBUILD_BUILD_TIMESTAMP that is not exposed to make, so changing KBUILD_BUILD_TIMESTAMP will not trigger a rebuild of the archive. Move $(KBUILD_BUILD_TIMESTAMP) to the Makefile so that is is recorded in the *.cmd file. Signed-off-by: Masahiro Yamada

kheaders: rebuild kheaders_data.tar.xz when a file is modified within a minute

2025-06-24T11:30:37Z

When a header file is changed, kernel/gen_kheaders.sh may fail to update kernel/kheaders_data.tar.xz. [steps to reproduce] [1] Build kernel/kheaders_data.tar.xz $ make -j$(nproc) kernel/kheaders.o DESCEND objtool INSTALL libsubcmd_headers CALL scripts/checksyscalls.sh CHK kernel/kheaders_data.tar.xz GEN kernel/kheaders_data.tar.xz CC kernel/kheaders.o [2] Modify a header without changing the file size $ sed -i s/0xdeadbeef/0xfeedbeef/ include/linux/elfnote.h [3] Rebuild kernel/kheaders_data.tar.xz $ make -j$(nproc) kernel/kheaders.o DESCEND objtool INSTALL libsubcmd_headers CALL scripts/checksyscalls.sh CHK kernel/kheaders_data.tar.xz kernel/kheaders_data.tar.xz is not updated if steps [1] - [3] are run within the same minute. The headers_md5 variable stores the MD5 hash of the 'ls -l' output for all header files. This hash value is used to determine whether kheaders_data.tar.xz needs to be rebuilt. However, 'ls -l' prints the modification times with minute-level granularity. If a file is modified within the same minute and its size remains the same, the MD5 hash does not change. To reliably detect file modifications, this commit rewrites kernel/gen_kheaders.sh to output header dependencies to kernel/.kheaders_data.tar.xz.cmd. Then, Make compares the timestamps and reruns kernel/gen_kheaders.sh when necessary. This is the standard mechanism used by Make and Kbuild. Signed-off-by: Masahiro Yamada

Merge tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-06-01T02:12:53Z

Pull non-MM updates from Andrew Morton: - "hung_task: extend blocking task stacktrace dump to semaphore" from Lance Yang enhances the hung task detector. The detector presently dumps the blocking tasks's stack when it is blocked on a mutex. Lance's series extends this to semaphores - "nilfs2: improve sanity checks in dirty state propagation" from Wentao Liang addresses a couple of minor flaws in nilfs2 - "scripts/gdb: Fixes related to lx_per_cpu()" from Illia Ostapyshyn fixes a couple of issues in the gdb scripts - "Support kdump with LUKS encryption by reusing LUKS volume keys" from Coiby Xu addresses a usability problem with kdump. When the dump device is LUKS-encrypted, the kdump kernel may not have the keys to the encrypted filesystem. A full writeup of this is in the series [0/N] cover letter - "sysfs: add counters for lockups and stalls" from Max Kellermann adds /sys/kernel/hardlockup_count and /sys/kernel/hardlockup_count and /sys/kernel/rcu_stall_count - "fork: Page operation cleanups in the fork code" from Pasha Tatashin implements a number of code cleanups in fork.c - "scripts/gdb/symbols: determine KASLR offset on s390 during early boot" from Ilya Leoshkevich fixes some s390 issues in the gdb scripts * tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (67 commits) llist: make llist_add_batch() a static inline delayacct: remove redundant code and adjust indentation squashfs: add optional full compressed block caching crash_dump, nvme: select CONFIGFS_FS as built-in scripts/gdb/symbols: determine KASLR offset on s390 during early boot scripts/gdb/symbols: factor out pagination_off() scripts/gdb/symbols: factor out get_vmlinux() kernel/panic.c: format kernel-doc comments mailmap: update and consolidate Casey Connolly's name and email nilfs2: remove wbc->for_reclaim handling fork: define a local GFP_VMAP_STACK fork: check charging success before zeroing stack fork: clean-up naming of vm_stack/vm_struct variables in vmap stacks code fork: clean-up ifdef logic around stack allocation kernel/rcu/tree_stall: add /sys/kernel/rcu_stall_count kernel/watchdog: add /sys/kernel/{hard,soft}lockup_count x86/crash: make the page that stores the dm crypt keys inaccessible x86/crash: pass dm crypt keys to kdump kernel Revert "x86/mm: Remove unused __set_memory_prot()" crash_dump: retrieve dm crypt keys in kdump kernel ...