lwn.git/kernel, branch docs-6.4-2

Merge tag 'irq-urgent-2023-03-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-03-05T19:19:16+00:00

Pull irq updates from Thomas Gleixner: "A set of updates for the interrupt susbsystem: - Prevent possible NULL pointer derefences in irq_data_get_affinity_mask() and irq_domain_create_hierarchy() - Take the per device MSI lock before invoking code which relies on it being hold - Make sure that MSI descriptors are unreferenced before freeing them. This was overlooked when the platform MSI code was converted to use core infrastructure and results in a fals positive warning - Remove dead code in the MSI subsystem - Clarify the documentation for pci_msix_free_irq() - More kobj_type constification" * tag 'irq-urgent-2023-03-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq/msi, platform-msi: Ensure that MSI descriptors are unreferenced genirq/msi: Drop dead domain name assignment irqdomain: Add missing NULL pointer check in irq_domain_create_hierarchy() genirq/irqdesc: Make kobj_type structures constant PCI/MSI: Clarify usage of pci_msix_free_irq() genirq/msi: Take the per-device MSI lock before validating the control structure genirq/ipi: Fix NULL pointer deref in irq_data_get_affinity_mask()

Merge tag 'mm-hotfixes-stable-2023-03-04-13-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2023-03-04T21:32:50+00:00

Pull misc fixes from Andrew Morton: "17 hotfixes. Eight are for MM and seven are for other parts of the kernel. Seven are cc:stable and eight address post-6.3 issues or were judged unsuitable for -stable backporting" * tag 'mm-hotfixes-stable-2023-03-04-13-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: mailmap: map Dikshita Agarwal's old address to his current one mailmap: map Vikash Garodia's old address to his current one fs/cramfs/inode.c: initialize file_ra_state fs: hfsplus: fix UAF issue in hfsplus_put_super panic: fix the panic_print NMI backtrace setting lib: parser: update documentation for match_NUMBER functions kasan, x86: don't rename memintrinsics in uninstrumented files kasan: test: fix test for new meminstrinsic instrumentation kasan: treat meminstrinsic as builtins in uninstrumented files kasan: emit different calls for instrumentable memintrinsics ocfs2: fix non-auto defrag path not working issue ocfs2: fix defrag path triggering jbd2 ASSERT mailmap: map Georgi Djakov's old Linaro address to his current one mm/hwpoison: convert TTU_IGNORE_HWPOISON to TTU_HWPOISON lib/zlib: DFLTCC deflate does not write all available bits for Z_NO_FLUSH mm/damon/paddr: fix missing folio_put() mm/mremap: fix dup_anon_vma() in vma_merge() case 4

umh: simplify the capability pointer logic

2023-03-04T00:18:19+00:00

The usermodehelper code uses two fake pointers for the two capability cases: CAP_BSET for reading and writing 'usermodehelper_bset', and CAP_PI to read and write 'usermodehelper_inheritable'. This seems to be a completely unnecessary indirection, since we could instead just use the pointers themselves, and never have to do any "if this then that" kind of logic. So just get rid of the fake pointer values, and use the real pointer values instead. Reviewed-by: Luis Chamberlain Cc: Eric Biederman Cc: Peter Zijlstra Cc: Christoph Hellwig Cc: Kees Cook Cc: Iurii Zaikin Signed-off-by: Linus Torvalds

Merge tag 'pm-6.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2023-03-03T18:30:58+00:00

Pull more power management updates from Rafael Wysocki: "These update power capping (new hardware support and cleanup) and cpufreq (bug fixes, cleanups and intel_pstate adjustment for a new platform). Specifics: - Fix error handling in the apple-soc cpufreq driver (Dan Carpenter) - Change the log level of a message in the amd-pstate cpufreq driver so it is more visible to users (Kai-Heng Feng) - Adjust the balance_performance EPP value for Sapphire Rapids in the intel_pstate cpufreq driver (Srinivas Pandruvada) - Remove MODULE_LICENSE from 3 pieces of non-modular code (Nick Alcock) - Make a read-only kobj_type structure in the schedutil cpufreq governor constant (Thomas Weißschuh) - Add Add Power Limit4 support for Meteor Lake SoC to the Intel RAPL power capping driver (Sumeet Pawnikar)" * tag 'pm-6.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: cpufreq: apple-soc: Fix an IS_ERR() vs NULL check powercap: remove MODULE_LICENSE in non-modules cpufreq: intel_pstate: remove MODULE_LICENSE in non-modules powercap: RAPL: Add Power Limit4 support for Meteor Lake SoC cpufreq: amd-pstate: remove MODULE_LICENSE in non-modules cpufreq: schedutil: make kobj_type structure constant cpufreq: amd-pstate: Let user know amd-pstate is disabled cpufreq: intel_pstate: Adjust balance_performance EPP for Sapphire Rapids

Merge tag 'block-6.3-2023-03-03' of git://git.kernel.dk/linux

2023-03-03T18:21:39+00:00

Pull block fixes from Jens Axboe: - NVMe pull request via Christoph: - Don't access released socket during error recovery (Akinobu Mita) - Bring back auto-removal of deleted namespaces during sequential scan (Christoph Hellwig) - Fix an error code in nvme_auth_process_dhchap_challenge (Dan Carpenter) - Show well known discovery name (Daniel Wagner) - Add a missing endianess conversion in effects masking (Keith Busch) - Fix for a regression introduced in blk-rq-qos during init in this merge window (Breno) - Reorder a few fields in struct blk_mq_tag_set, eliminating a few holes and shrinking it (Christophe) - Remove redundant bdev_get_queue() NULL checks (Juhyung) - Add sed-opal single user mode support flag (Luca) - Remove SQE128 check in ublk as it isn't needed, saving some memory (Ming) - Op specific segment checking for cloned requests (Uday) - Exclusive open partition scan fixes (Yu) - Loop offset/size checking before assigning them in the device (Zhong) - Bio polling fixes (me) * tag 'block-6.3-2023-03-03' of git://git.kernel.dk/linux: blk-mq: enforce op-specific segment limits in blk_insert_cloned_request nvme-fabrics: show well known discovery name nvme-tcp: don't access released socket during error recovery nvme-auth: fix an error code in nvme_auth_process_dhchap_challenge() nvme: bring back auto-removal of deleted namespaces during sequential scan blk-iocost: Pass gendisk to ioc_refresh_params nvme: fix sparse warning on effects masking block: be a bit more careful in checking for NULL bdev while polling block: clear bio->bi_bdev when putting a bio back in the cache loop: loop_set_status_from_info() check before assignment ublk: remove check IO_URING_F_SQE128 in ublk_ch_uring_cmd block: remove more NULL checks after bdev_get_queue() blk-mq: Reorder fields in 'struct blk_mq_tag_set' block: fix scan partition for exclusively open device again block: Revert "block: Do not reread partition table on exclusively open device" sed-opal: add support flag for SUM in status ioctl

panic: fix the panic_print NMI backtrace setting

2023-03-03T05:54:23+00:00

Commit 8d470a45d1a6 ("panic: add option to dump all CPUs backtraces in panic_print") introduced a setting for the "panic_print" kernel parameter to allow users to request a NMI backtrace on panic. Problem is that the panic_print handling happens after the secondary CPUs are already disabled, hence this option ended-up being kind of a no-op - kernel skips the NMI trace in idling CPUs, which is the case of offline CPUs. Fix it by checking the NMI backtrace bit in the panic_print prior to the CPU disabling function. Link: https://lkml.kernel.org/r/20230226160838.414257-1-gpiccoli@igalia.com Fixes: 8d470a45d1a6 ("panic: add option to dump all CPUs backtraces in panic_print") Signed-off-by: Guilherme G. Piccoli Cc: Cc: Baoquan He Cc: Dave Young Cc: Feng Tang Cc: HATAYAMA Daisuke Cc: Hidehiro Kawai Cc: Kees Cook Cc: Michael Kelley Cc: Petr Mladek Cc: Vivek Goyal Signed-off-by: Andrew Morton

genirq/msi, platform-msi: Ensure that MSI descriptors are unreferenced

2023-03-02T17:09:44+00:00

Miquel reported a warning in the MSI core which is triggered when interrupts are freed via platform_msi_device_domain_free(). This code got reworked to use core functions for freeing the MSI descriptors, but nothing took care to clear the msi_desc->irq entry, which then triggers the warning in msi_free_msi_desc() which uses desc->irq to validate that the descriptor has been torn down. The same issue exists in msi_domain_populate_irqs(). Up to the point that msi_free_msi_descs() grew a warning for this case, this went un-noticed. Provide the counterpart of msi_domain_populate_irqs() and invoke it in platform_msi_device_domain_free() before freeing the interrupts and MSI descriptors and also in the error path of msi_domain_populate_irqs(). Fixes: 2f2940d16823 ("genirq/msi: Remove filter from msi_free_descs_free_range()") Reported-by: Miquel Raynal Signed-off-by: Thomas Gleixner Tested-by: Miquel Raynal Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/87mt4wkwnv.ffs@tglx

capability: just use a 'u64' instead of a 'u32[2]' array

2023-03-01T18:01:22+00:00

Back in 2008 we extended the capability bits from 32 to 64, and we did it by extending the single 32-bit capability word from one word to an array of two words. It was then obfuscated by hiding the "2" behind two macro expansions, with the reasoning being that maybe it gets extended further some day. That reasoning may have been valid at the time, but the last thing we want to do is to extend the capability set any more. And the array of values not only causes source code oddities (with loops to deal with it), but also results in worse code generation. It's a lose-lose situation. So just change the 'u32[2]' into a 'u64' and be done with it. We still have to deal with the fact that the user space interface is designed around an array of these 32-bit values, but that was the case before too, since the array layouts were different (ie user space doesn't use an array of 32-bit values for individual capability masks, but an array of 32-bit slices of multiple masks). So that marshalling of data is actually simplified too, even if it does remain somewhat obscure and odd. This was all triggered by my reaction to the new "cap_isidentical()" introduced recently. By just using a saner data structure, it went from unsigned __capi; CAP_FOR_EACH_U32(__capi) { if (a.cap[__capi] != b.cap[__capi]) return false; } return true; to just being return a.val == b.val; instead. Which is rather more obvious both to humans and to compilers. Cc: Mateusz Guzik Cc: Casey Schaufler Cc: Serge Hallyn Cc: Al Viro Cc: Paul Moore Signed-off-by: Linus Torvalds

Merge tag 'dma-mapping-6.3-2022-02-27' of git://git.infradead.org/users/hch/dma-mapping

2023-02-27T17:38:51+00:00

Pull dma-mapping updates from Christoph Hellwig: - remove a not very useful and now unused swiotlb API (Christoph Hellwig) - fix a section mismatch (Randy Dunlap) * tag 'dma-mapping-6.3-2022-02-27' of git://git.infradead.org/users/hch/dma-mapping: swiotlb: mark swiotlb_memblock_alloc() as __init swiotlb: remove swiotlb_max_segment

Merge tag 'kbuild-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2023-02-26T19:53:25+00:00

Pull Kbuild updates from Masahiro Yamada: - Change V=1 option to print both short log and full command log - Allow V=1 and V=2 to be combined as V=12 - Make W=1 detect wrong .gitignore files - Tree-wide cleanups for unused command line arguments passed to Clang - Stop using -Qunused-arguments with Clang - Make scripts/setlocalversion handle only correct release tags instead of any arbitrary annotated tag - Create Debian and RPM source packages without cleaning the source tree - Various cleanups for packaging * tag 'kbuild-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (74 commits) kbuild: rpm-pkg: remove unneeded KERNELRELEASE from modules/headers_install docs: kbuild: remove description of KBUILD_LDS_MODULE .gitattributes: use 'dts' diff driver for *.dtso files kbuild: deb-pkg: improve the usability of source package kbuild: deb-pkg: fix binary-arch and clean in debian/rules kbuild: tar-pkg: use tar rules in scripts/Makefile.package kbuild: make perf-tar*-src-pkg work without relying on git kbuild: deb-pkg: switch over to source format 3.0 (quilt) kbuild: deb-pkg: make .orig tarball a hard link if possible kbuild: deb-pkg: hide KDEB_SOURCENAME from Makefile kbuild: srcrpm-pkg: create source package without cleaning kbuild: rpm-pkg: build binary packages from source rpm kbuild: deb-pkg: create source package without cleaning kbuild: add a tool to list files ignored by git Documentation/llvm: add Chimera Linux, Google and Meta datacenters setlocalversion: use only the correct release tag for git-describe setlocalversion: clean up the construction of version output .gitignore: ignore *.cover and *.mbx kbuild: remove --include-dir MAKEFLAG from top Makefile kbuild: fix trivial typo in comment ...