summaryrefslogtreecommitdiff
AgeCommit message (Collapse)Author
2026-03-20Merge tag 'regulator-fix-v7.0-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator Pull regulator fix from Mark Brown: "Just one fix here from Hugo Villeneuve, the documentation for some of the regulator DT properties had been cut'n'pasted so that if anyone actually read it they'd be informed that those properties had completely incorrect meanings" * tag 'regulator-fix-v7.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: regulator: dt-bindings: fix typos in regulator-uv-* descriptions
2026-03-20Merge tag 'pmdomain-v7.0-rc1-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm Pull pmdomain fixes from Ulf Hansson: - bcm: increase ASB control timeout for bcm2835 - mediatek: fix power domain count * tag 'pmdomain-v7.0-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm: pmdomain: bcm: bcm2835-power: Increase ASB control timeout pmdomain: mediatek: Fix power domain count
2026-03-20tools/nolibc/printf: Use bit-masks to hold requested flag, length and ↵David Laight
conversion chars Use flags bits (1u << (ch & 31)) for the flags, length modifiers, and conversion specifiers. This makes it easy to test for multiple values at once. Detect the conversion flags " #+-0" although they are currently all ignored. Unconditionally generate the signed values (for %d) to remove a second set of checks for the size. Separate out the formatting of single characters from numbers. Output the sign for negative values then negate and treat as unsigned. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260308113742.12649-9-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20tools/nolibc/printf: Use goto and reduce indentationDavid Laight
Upcoming changes will need to use goto to jump to the code that outputs characters. Use 'goto do_output' to output a known number of characters. Use 'goto do_strlen_output' to output a '\0' terminated string. Removes a level of indentation from the format processing code. The change is best reviewed using 'git diff -b' after applying it. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260308113742.12649-8-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20tools/nolibc/printf: Simplify __nolibc_printf()David Laight
Move the check for the length modifiers into the format processing between the field width and conversion specifier. This lets the loop be simplified and a 'fast scan' for a format start used. If an error is detected (eg an invalid conversion specifier) then copy the invalid format to the output buffer. Reduces code size by about 10% on x86-64. Some versions of gcc bloat this version by generating a jump table. All goes away in the later patches. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260308113742.12649-7-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20tools/nolibc/printf: Output pad characters in 16 byte chunksDavid Laight
Simple to do and saves calls to the callback function. Change variables written, width and len to 'signed int' to get better code. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260308113742.12649-6-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20tools/nolibc: Rename the 'errnum' parameter to strerror()David Laight
Change the parameter variable name from 'errno' to 'errnum'. Matches any documentation and avoids any issues that might happen if errno is actually a #define (which is not uncommon). Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260308113742.12649-5-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20tools/nolibc: Implement strerror() in terms of strerror_r()David Laight
strerror() can be the only part of a program that has a .data section. This requires 4k in the program file. Add a simple implementation of strerror_r() and use that in strerror() so that the "errno=" string is copied at run-time. Use __builtin_memcpy() because that optimises away the input string and just writes the required constants to the target buffer. Code size change largely depends on whether the inlining decision for strerror() changes. Change the tests to use the normal EXPECT_VFPRINTF() when testing %m. Skip the tests when !is_nolibc. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260308113742.12649-4-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20selftests/nolibc: Rename w to written in expect_vfprintf()David Laight
Single character variable names don't make code easy to read. Rename 'w' (used for the return value from snprintf()) 'written'. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260308113742.12649-3-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20tools/nolibc: Add _NOLIBC_OPTIMIZER_HIDE_VAR() to compiler.hDavid Laight
Needed to stop compiler 'optimisations' bloating code. Equivalent to the definition in include/linux/compiler.h Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260308113742.12649-2-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20selftests/nolibc: Let EXPECT_VFPRINTF() tests be skippedDavid Laight
Tests that check explicit nolibc behavior (eg "%m") or test places where the nolibc behaviour deviates from the libc need skipping when compiled to use the host libc. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260302101815.3043-8-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20selftests/nolibc: Check that snprintf() doesn't write beyond the buffer endDavid Laight
Fill buf[] with known data and check the vsnprintf() doesn't write beyond the specified buffer length. Would have picked up the bug in field padding. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260302101815.3043-7-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20selftests/nolibc: Use length of 'expected' string to check snprintf() outputDavid Laight
Instead of requiring the test cases specifying both the length and expected output, take the length from the expected output. Tests that expect the output be truncated are changed to specify the un-truncated output. Change the strncmp() to a memcmp() with an extra check that the output is actually terminated. Append a '+' to the printed output (after the final ") when the output is truncated. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260302101815.3043-6-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20selftests/nolibc: check vsnprintf() output buffer before the lengthDavid Laight
Check the string matches before checking the returned length. Only print the string once when it matches. Makes it a lot easier to diagnose any incorrect output. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260302101815.3043-5-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20selftests/nolibc: Return correct value when printf test failsDavid Laight
Correctly return 1 (the number of errors) when strcmp() fails rather than the return value from strncmp() which is the signed difference between the mismatching characters. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260302101815.3043-4-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20tools/nolibc/printf: Move snprintf length check to callbackDavid Laight
Move output truncation to the snprintf() callback. This simplifies the main code and fixes truncation of padded fields. Add a zero length callback to 'finalise' the buffer rather than doing it in snprintf() itself. Fixes: e90ce42e81381 ("tools/nolibc: implement width padding in printf()") Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260302101815.3043-3-david.laight.linux@gmail.com [Thomas: clean up Fixes trailer] Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20tools/nolibc/printf: Change variables 'c' to 'ch' and 'tmpbuf[]' to 'outbuf[]'David Laight
Changing 'c' makes the code slightly easier to read because the variable stands out from the single character literals (especially 'c'). Change tmpbuf[] to outbuf[] because 'out' points into it. The following patches pretty much rewrite the function so the churn is limited. Signed-off-by: David Laight <david.laight.linux@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260223101735.2922-7-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20tools/nolibc: Optimise and common up the number to ascii functionsDavid Laight
Implement u[64]to[ah]_r() using a common function that uses multiply by reciprocal to generate the least significant digit first and then reverses the string. On 32bit this is five multiplies (with 64bit product) for each output digit. I think the old utoa_r() always did 36 multiplies and a lot of subtracts - so this is likely faster even for 32bit values. Definitely better for 64bit values (especially small ones). Clearly shifts are faster for base 16, but reversing the output buffer makes a big difference. Sharing the code reduces the footprint (unless gcc decides to constant fold the functions). Definitely helps vfprintf() where the constants get loaded and a single call is done. Also makes it cheap to add octal support to vfprintf for completeness. Signed-off-by: David Laight <david.laight.linux@gmail.com> Link: https://patch.msgid.link/20260223101735.2922-3-david.laight.linux@gmail.com Acked-by: Willy Tarreau <w@1wt.eu> [Thomas: skip int128 multiplication on SPARC and clang] Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20selftests/nolibc: Fix build with host headers and libcDavid Laight
Many systems don't have strlcpy() or strlcat() and readdir_r() is deprecated. This makes the tests fail to build with the host headers. Disable the 'directories' test and define strlcpy(), strlcat() and readdir_r() using #defines so that the code compiles. Fixes: 6fe8360b16acb ("selftests/nolibc: also test libc-test through regular selftest framework") Signed-off-by: David Laight <david.laight.linux@gmail.com> Link: https://patch.msgid.link/20260223101735.2922-4-david.laight.linux@gmail.com Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20selftests/nolibc: fix test_file_stream() on musl libcThomas Weißschuh
fwrite() modifying errno is non-standard. Only validate this behavior on those libc implementations which implement it. Fixes: a5f00be9b3b0 ("tools/nolibc: Add a simple test for writing to a FILE and reading it back") Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-03-20Merge tag 'mmc-v7.0-rc1-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc Pull MMC fixes from Ulf Hansson: - sdhci: Fix timing selection for 1-bit bus width - sdhci-pci-gli: Fix DMA write corruption for GL9750 * tag 'mmc-v7.0-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: mmc: sdhci: fix timing selection for 1-bit bus width mmc: sdhci-pci-gli: fix GL9750 DMA write corruption
2026-03-20Merge tag 'ata-7.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux Pull ata fixes from Niklas Cassel: - ADATA SU680 SSDs are causing command timeouts when LPM is enabled. Enable the ATA_QUIRK_NOLPM quirk to prevent LPM from being enabled on these devices (Damien) - When receiving a REPORT SUPPORTED OPERATION CODES command with an invalid REPORTING OPTIONS format, sense data should have the field pointer set to byte 2 (the location of the REPORTING OPTIONS field) instead of incorrectly pointing to byte 1 (Damien) * tag 'ata-7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux: ata: libata-scsi: report correct sense field pointer in ata_scsiop_maint_in() ata: libata-core: disable LPM on ADATA SU680 SSD
2026-03-20Merge tag 'mtd/fixes-for-7.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux Pull MTD fixes from Miquel Raynal: - In SPI NOR, there was an issue with the RDCR capability, leading to several platforms no longer capable of using it for wrong reasons (the follow-up commit renames the helper to avoid future confusion) - NAND controller drivers needed to be improved to fix some timings, a locking schenario and avoid certain operations during panic writes - The Spear600 DT binding conversion was done partially, leading to several warnings which have individually been fixed - Tudor gets replaced by Takahiro for the SPI NOR maintainance - Plus two more misc fixes * tag 'mtd/fixes-for-7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: mtd: rawnand: pl353: make sure optimal timings are applied mtd: spi-nor: Rename spi_nor_spimem_check_op() mtd: spi-nor: Fix RDCR controller capability core check mtd: rawnand: brcmnand: skip DMA during panic write mtd: rawnand: serialize lock/unlock against other NAND operations dt-bindings: mtd: st,spear600-smi: Fix example dt-bindings: mtd: st,spear600-smi: #address/size-cells is mandatory dt-bindings: mtd: st,spear600-smi: Fix description mtd: rawnand: cadence: Fix error check for dma_alloc_coherent() in cadence_nand_init() mtd: Avoid boot crash in RedBoot partition table parser MAINTAINERS: add Takahiro Kuwano as SPI NOR reviewer MAINTAINERS: remove Tudor Ambarus as SPI NOR maintainer
2026-03-20Merge tag 'iommu-fixes-v7.0-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux Pull iommu fixes from Joerg Roedel: "Intel VT-d: - Abort all pending requests on dev_tlb_inv timeout to avoid hardlockup - Limit IOPF handling to PRI-capable device to avoid SVA attach failure AMD-Vi: - Make sure identity domain is not used when SNP is active Core fixes: - Handle mapping IOVA 0x0 correctly - Fix crash in SVA code - Kernel-doc fix in IO-PGTable code" * tag 'iommu-fixes-v7.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux: iommu/amd: Block identity domain when SNP enabled iommu/sva: Fix crash in iommu_sva_unbind_device() iommu/io-pgtable: fix all kernel-doc warnings in io-pgtable.h iommu: Fix mapping check for 0x0 to avoid re-mapping it iommu/vt-d: Only handle IOPF for SVA when PRI is supported iommu/vt-d: Fix intel iommu iotlb sync hardlockup and retry
2026-03-20Merge tag 'arm64-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Will Deacon: "There's a small crop of fixes for the MPAM resctrl driver, a fix for SCS/PAC patching with the AMDGPU driver and a page-table fix for realms running with 52-bit physical addresses: - Fix DWARF parsing for SCS/PAC patching to work with very large modules (such as the amdgpu driver) - Fixes to the mpam resctrl driver - Fix broken handling of 52-bit physical addresses when sharing memory from within a realm" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: realm: Fix PTE_NS_SHARED for 52bit PA support arm_mpam: Force __iomem casts arm_mpam: Disable preemption when making accesses to fake MSC in kunit test arm_mpam: Fix null pointer dereference when restoring bandwidth counters arm64/scs: Fix handling of advance_loc4
2026-03-21Merge tag 'amd-drm-next-7.1-2026-03-19' of ↵Dave Airlie
https://gitlab.freedesktop.org/agd5f/linux into drm-next amd-drm-next-7.1-2026-03-19: amdgpu: - Fix gamma 2.2 colorop TFs - BO list fix - LTO fix - DC FP fix - DisplayID handling fix - DCN 2.01 fix - MMHUB boundary fixes - ISP fix - TLB fence fix - Hainan pm fix - UserQ fixes - MES 12.1 Updates - GC 12.1 updates - RAS fixes - DML updates - Cursor fixes - SWSMU cleanups - Misc cleanups - Clean up duplicate format modifiers - Devcoredump updates - Cleanup mmhub cid handling - Initial VCN 5.0.2 support - Initial JPEG 5.0.2 support - PSP 13.0.15 updates amdkfd: - Queue properties fix - GC 12.1 updates radeon: - Hainan pm fix Signed-off-by: Dave Airlie <airlied@redhat.com> From: Alex Deucher <alexander.deucher@amd.com> Link: https://patch.msgid.link/20260319173334.479766-1-alexander.deucher@amd.com
2026-03-20Merge tag 'hyperv-fixes-signed-20260319' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux Pull Hyper-V fixes from Wei Liu: - Fix ARM64 MSHV support (Anirudh Rayabharam) - Fix MSHV driver memory handling issues (Stanislav Kinsburskii) - Update maintainers for Hyper-V DRM driver (Saurabh Sengar) - Misc clean up in MSHV crashdump code (Ard Biesheuvel, Uros Bizjak) - Minor improvements to MSHV code (Mukesh R, Wei Liu) - Revert not yet released MSHV scrub partition hypercall (Wei Liu) * tag 'hyperv-fixes-signed-20260319' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: mshv: Fix error handling in mshv_region_pin MAINTAINERS: Update maintainers for Hyper-V DRM driver mshv: Fix use-after-free in mshv_map_user_memory error path mshv: pass struct mshv_user_mem_region by reference x86/hyperv: Use any general-purpose register when saving %cr2 and %cr8 x86/hyperv: Use current_stack_pointer to avoid asm() in hv_hvcrash_ctxt_save() x86/hyperv: Save segment registers directly to memory in hv_hvcrash_ctxt_save() x86/hyperv: Use __naked attribute to fix stackless C function Revert "mshv: expose the scrub partition hypercall" mshv: add arm64 support for doorbell & intercept SINTs mshv: refactor synic init and cleanup x86/hyperv: print out reserved vectors in hexadecimal
2026-03-21Merge tag 'drm-xe-fixes-2026-03-19' of ↵Dave Airlie
https://gitlab.freedesktop.org/drm/xe/kernel into drm-fixes Driver Changes: - A number of teardown fixes (Daniele, Matt Brost, Zhanjun, Ashutosh) - Skip over non-leaf PTE for PRL generation (Brian) - Fix an unitialized variable (Umesh) - Fix a missing runtime PM reference (Sanjay) Signed-off-by: Dave Airlie <airlied@redhat.com> From: Thomas Hellstrom <thomas.hellstrom@linux.intel.com> Link: https://patch.msgid.link/abxj4_dBHYBiSvDG@fedora
2026-03-20Merge tag 'v7.0-rc4-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds
Pull smb client fixes from Steve French: - Fix reporting of i_blocks - Fix Kerberos mounts with different usernames to same server - Trivial comment cleanup * tag 'v7.0-rc4-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6: smb: client: fix generic/694 due to wrong ->i_blocks cifs: smb1: fix comment typo smb: client: fix krb5 mount with username option
2026-03-20Merge tag 'v7.0-rc4-ksmbd-server-fixes' of git://git.samba.org/ksmbdLinus Torvalds
Pull smb server fixes from Steve French: - Three use after free fixes (in close, in compounded ops, and in tree disconnect) - Multichannel fix - return proper volume identifier (superblock uuid if available) in FS_OBJECT_ID queries * tag 'v7.0-rc4-ksmbd-server-fixes' of git://git.samba.org/ksmbd: ksmbd: fix use-after-free in durable v2 replay of active file handles ksmbd: fix use-after-free of share_conf in compound request ksmbd: use volume UUID in FS_OBJECT_ID_INFORMATION ksmbd: unset conn->binding on failed binding request ksmbd: fix share_conf UAF in tree_conn disconnect
2026-03-21Merge tag 'amd-drm-fixes-7.0-2026-03-19' of ↵Dave Airlie
https://gitlab.freedesktop.org/agd5f/linux into drm-fixes amd-drm-fixes-7.0-2026-03-19: amdgpu: - Fix gamma 2.2 colorop TFs - BO list fix - LTO fix - DC FP fix - DisplayID handling fix - DCN 2.01 fix - MMHUB boundary fixes - ISP fix - TLB fence fix - Hainan pm fix radeon: - Hainan pm fix Signed-off-by: Dave Airlie <airlied@redhat.com> From: Alex Deucher <alexander.deucher@amd.com> Link: https://patch.msgid.link/20260319131013.36639-1-alexander.deucher@amd.com
2026-03-21Merge tag 'drm-misc-fixes-2026-03-19' of ↵Dave Airlie
https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes A doc warning fix and a memory leak fix for vmwgfx, a deadlock fix and interrupt handling fixes for imagination, a locking fix for pagemap_until, a UAF fix for drm_dev_unplug, and a multi-channel audio handling fix for dw-hdmi-qp. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <mripard@redhat.com> Link: https://patch.msgid.link/20260319-lush-righteous-malamute-e7bb98@houat
2026-03-21Merge tag 'drm-intel-fixes-2026-03-19' of ↵Dave Airlie
https://gitlab.freedesktop.org/drm/i915/kernel into drm-fixes - Fix #15771: Screen corruption and stuttering on P14s w/ 3K display - Fix for PSR entry setup frames count on rejected commit - Fix OOPS if firmware is not loaded and suspend is attempted - Fix unlikely NULL deref due to DC6 on probe Signed-off-by: Dave Airlie <airlied@redhat.com> From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: https://patch.msgid.link/abujAnD-lRDCVSKg@jlahtine-mobl
2026-03-20cxl: Add endpoint decoder flags clear when PCI reset happensDave Jiang
When a PCI reset happens, the lock and enable flags of the CXL device should be cleared to avoid stale state flags after reset. Add flag clearing during cxl_reset_done() to clear the relevant endpoint decoder flags for all decoders of the endpoint device. Reported-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Link: https://patch.msgid.link/20260319152541.2739343-1-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-03-20x86/efi: efi_unmap_boot_services: fix calculation of ranges_to_free sizeMike Rapoport (Microsoft)
ranges_to_free array should have enough room to store the entire EFI memmap plus an extra element for NULL entry. The calculation of this array size wrongly adds 1 to the overall size instead of adding 1 to the number of elements. Add parentheses to properly size the array. Reported-by: Guenter Roeck <linux@roeck-us.net> Fixes: a4b0bf6a40f3 ("x86/efi: defer freeing of boot services memory") Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2026-03-20Merge patch series "pid_namespace: make init creation more flexible"Christian Brauner
Pavel Tikhomirov <ptikhomirov@virtuozzo.com> says: The first patch properly annotates accesses to ->child_reaper with _ONCE macroses, to protect unlocked accesses from possible cpu/compiler optimization problems. The second patch makes sure that the init is always a first process in the pid namespace, previously this was only checked for set_tid case. The third patch allows to join pid namespace before pid namespace init is created, that allows to create pid namespace by one process and then create pid namespace init from another process after setns(). Please see the detailed description in the patch commit message. It depends on the second patch. The forth and the final patch is a comprehansive test, that tests both basic usecase of creating pid namespace and init separately, and a more specific usecase which shows how we can improve clone3(set_tid) usability after this change. This change is generally useful as it makes clone3(set_tid) more universal, and let's it work in all the cases evenly. Also it is highly useful to CRIU to handle nested containers. * patches from https://patch.msgid.link/20260318122157.280595-1-ptikhomirov@virtuozzo.com: MAINTAINERS: add a new entry for testing pidns init creation via setns selftests: Add tests for creating pidns init via setns pid_namespace: allow opening pid_for_children before init was created pid: check init is created first after idr alloc pid_namespace: avoid optimization of accesses to ->child_reaper Link: https://patch.msgid.link/20260318122157.280595-1-ptikhomirov@virtuozzo.com Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-03-20MAINTAINERS: add a pid namespace entryPavel Tikhomirov
Add a new entry for pid namespaces et al. Link: https://patch.msgid.link/20260318122157.280595-6-ptikhomirov@virtuozzo.com Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com> Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-03-20selftests: Add tests for creating pidns init via setnsPavel Tikhomirov
First testcase "pidns_init_via_setns" checks that a process can become Pid 1 (init) in a new Pid namespace created via unshare() and joined via setns(). Second testcase "pidns_init_via_setns_set_tid" checks that during this process we can use clone3() + set_tid and set the pid in both the new and old pid namespaces (owned by different user namespaces). This test requires root to run to avoid complex setup for wrapper userns. Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com> -- pidns_init_via_setns. Make pidns_init_via_setns_set_tid require root. Link: https://patch.msgid.link/20260318122157.280595-5-ptikhomirov@virtuozzo.com v6: Move wrapper userns creation for unprivileged case to the top of Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-03-20pid_namespace: allow opening pid_for_children before init was createdPavel Tikhomirov
This effectively gives us an ability to create the pid namespace init as a child of the process (setns-ed to the pid namespace) different to the process which created the pid namespace itself. Original problem: There is a cool set_tid feature in clone3() syscall, it allows you to create process with desired pids on multiple pid namespace levels. Which is useful to restore processes in CRIU for nested pid namespace case. In nested container case we can potentially see this kind of pid/user namespace tree: Process ┌─────────┐ User NS0 ──▶ Pid NS0 ──▶ Pid p0 │ │ │ │ │ ▼ ▼ │ │ User NS1 ──▶ Pid NS1 ──▶ Pid p1 │ │ │ │ │ ... ... │ ... │ │ │ │ │ ▼ ▼ │ │ User NSn ──▶ Pid NSn ──▶ Pid pn │ └─────────┘ So to create the "Process" and set pids {p0, p1, ... pn} for it on all pid namespace levels we can use clone3() syscall set_tid feature, BUT the syscall does not allow you to set pid on pid namespace levels you don't have permission to. So basically you have to be in "User NS0" when creating the "Process" to actually be able to set pids on all levels. It is ok for almost any process, but with pid namespace init this does not work, as currently we can only create pid namespace init and the pid namespace itself simultaneously, so to make "Pid NSn" owned by "User NSn" we have to be in the "User NSn". We can't possibly be in "User NS0" and "User NSn" at the same time, hence the problem. Alternative solution: Yes, for the case of pid namespace init we can use old and gold /proc/sys/kernel/ns_last_pid interface on the levels lower than n. But it is much more complicated and introduces tons of extra code to do. It would be nice to make clone3() set_tid interface also aplicable to this corner case. Implementation: Now when anyone can setns to the pid namespace before the creation of init, and thus multiple processes can fork children to the pid namespace, it is important that we enforce the first process created is always pid namespace init. (Note that this was done by the previous preparational patch as a standalon useful change.) We only allow other processes after the init sets pid_namespace->child_reaper. Reviewed-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Andrei Vagin <avagin@google.com> Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com> -- v2: Use *_ONCE for ->child_reaper accesses atomicity, and avoid taking task_list lock for reading it. Rebase to master, and thus remove now excess pidns_ready variable. v3: Separate *_ONCE change and "init is first" checks into separate commits. v5: Add Andrei's review tag. ->child_reaper which can influence the pid namespace, so it looks like the pid namespace is fully setup at the point when init sets ->child_reaper to receive more processes. Thus tasklist lock looks excess in pidns_for_children_get()'s ->child_reaper check and it should be safe not to have it in the corresponding check in alloc_pid() (introduced earlier in this series). Link: https://patch.msgid.link/20260318122157.280595-4-ptikhomirov@virtuozzo.com Acked-by: Andrei Vagin <avagin@google.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Note: I didn't find anything in copy_process() around setting the Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-03-20pid: check init is created first after idr allocPavel Tikhomirov
This moves the condition (tid != 1 && !tmp->child_reaper) to after idr alloc, so it not only covers that first process in pid namespace has pid 1 in case of clone3(set_tid) requesting wrong pid, but also if idr itself gives wrong pid for some reason. This could've been the case before this patch, when creating first process the alloc_pid()->pidfs_add_pid() code path fails, so that the idr->idr_next is non zero anymore and next process calling to alloc_pid(), will get 2 as a pid from idr_alloc_cyclic(). Though thanks to PIDNS_ADDING logic, free_pid() disables further pid allocation in this case and it does not lead to any real problem. Note: This is also a preparation for the next patch in the series, which will introduce an ability of creating init from the task different to the task which had created the pid namespace. Needed to make sure that init is always first, even in this new case. -- Suggested-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Andrei Vagin <avagin@google.com> Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com> Link: https://patch.msgid.link/20260318122157.280595-3-ptikhomirov@virtuozzo.com v3: Split from main commit. Merge two checks of ->child_reaper into one. v4: Update commit message about PIDNS_ADDING. v5: Add Andrei's review tag. Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-03-20pid_namespace: avoid optimization of accesses to ->child_reaperPavel Tikhomirov
To avoid potential problems related to cpu/compiler optimizations around ->child_reaper, let's use WRITE_ONCE (additional to task_list lock) everywhere we write it and use READ_ONCE where we read it without explicit lock. Note: It also pairs with existing READ_ONCE with no lock in nsfs_fh_to_dentry(). Also let's add ASSERT_EXCLUSIVE_WRITER before write to identify to KCSAN that we don't expect any concurrent ->child_reaper modifications, and those must be detected. -- Suggested-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com> Link: https://patch.msgid.link/20260318122157.280595-2-ptikhomirov@virtuozzo.com v3: Split from main commit. Add ASSERT_EXCLUSIVE_WRITER. v5: Add one more READ_ONCE for access without lock in free_pid(). Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-03-20rtla: Fix segfault on multiple SIGINTsTomas Glozar
Detach stop_trace() from SIGINT/SIGALRM on tool clean-up to prevent it from crashing RTLA by accessing freed memory. This prevents a crash when multiple SIGINTs are received. Fixes: d6899e560366 ("rtla/timerlat_hist: Abort event processing on second signal") Fixes: 80967b354a76 ("rtla/timerlat_top: Abort event processing on second signal") Reviewed-by: Wander Lairson Costa <wander@redhat.com> Link: https://lore.kernel.org/r/20260310160725.144443-1-tglozar@redhat.com Signed-off-by: Tomas Glozar <tglozar@redhat.com>
2026-03-20writeback: don't block sync for filesystems with no data integrity guaranteesJoanne Koong
Add a SB_I_NO_DATA_INTEGRITY superblock flag for filesystems that cannot guarantee data persistence on sync (eg fuse). For superblocks with this flag set, sync kicks off writeback of dirty inodes but does not wait for the flusher threads to complete the writeback. This replaces the per-inode AS_NO_DATA_INTEGRITY mapping flag added in commit f9a49aa302a0 ("fs/writeback: skip AS_NO_DATA_INTEGRITY mappings in wait_sb_inodes()"). The flag belongs at the superblock level because data integrity is a filesystem-wide property, not a per-inode one. Having this flag at the superblock level also allows us to skip having to iterate every dirty inode in wait_sb_inodes() only to skip each inode individually. Prior to this commit, mappings with no data integrity guarantees skipped waiting on writeback completion but still waited on the flusher threads to finish initiating the writeback. Waiting on the flusher threads is unnecessary. This commit kicks off writeback but does not wait on the flusher threads. This change properly addresses a recent report [1] for a suspend-to-RAM hang seen on fuse-overlayfs that was caused by waiting on the flusher threads to finish: Workqueue: pm_fs_sync pm_fs_sync_work_fn Call Trace: <TASK> __schedule+0x457/0x1720 schedule+0x27/0xd0 wb_wait_for_completion+0x97/0xe0 sync_inodes_sb+0xf8/0x2e0 __iterate_supers+0xdc/0x160 ksys_sync+0x43/0xb0 pm_fs_sync_work_fn+0x17/0xa0 process_one_work+0x193/0x350 worker_thread+0x1a1/0x310 kthread+0xfc/0x240 ret_from_fork+0x243/0x280 ret_from_fork_asm+0x1a/0x30 </TASK> On fuse this is problematic because there are paths that may cause the flusher thread to block (eg if systemd freezes the user session cgroups first, which freezes the fuse daemon, before invoking the kernel suspend. The kernel suspend triggers ->write_node() which on fuse issues a synchronous setattr request, which cannot be processed since the daemon is frozen. Or if the daemon is buggy and cannot properly complete writeback, initiating writeback on a dirty folio already under writeback leads to writeback_get_folio() -> folio_prepare_writeback() -> unconditional wait on writeback to finish, which will cause a hang). This commit restores fuse to its prior behavior before tmp folios were removed, where sync was essentially a no-op. [1] https://lore.kernel.org/linux-fsdevel/CAJnrk1a-asuvfrbKXbEwwDSctvemF+6zfhdnuzO65Pt8HsFSRw@mail.gmail.com/T/#m632c4648e9cafc4239299887109ebd880ac6c5c1 Fixes: 0c58a97f919c ("fuse: remove tmp folio for writebacks and internal rb tree") Reported-by: John <therealgraysky@proton.me> Cc: stable@vger.kernel.org Signed-off-by: Joanne Koong <joannelkoong@gmail.com> Link: https://patch.msgid.link/20260320005145.2483161-2-joannelkoong@gmail.com Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: David Hildenbrand (Arm) <david@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-03-20fs: remove stale and duplicate forward declarationsYuto Ohnuki
Remove the following unnecessary forward declarations from fs.h, which improves maintainability. - struct hd_geometry: became unused in fs.h when block_device_operations was moved to blkdev.h in commit 08f858512151 ("[PATCH] move block_device_operations to blkdev.h"). The forward declaration is now added to blkdev.h where it is actually used. - struct iovec: became unused when aio_read/aio_write were removed in commit 8436318205b9 ("->aio_read and ->aio_write removed") - struct iov_iter: duplicate forward declaration. This removes the redundant second declaration, added in commit 293bc9822fa9 ("new methods: ->read_iter() and ->write_iter()") Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202512301303.s7YWTZHA-lkp@intel.com/ Closes: https://lore.kernel.org/oe-kbuild-all/202512302139.Wl0soAlz-lkp@intel.com/ Closes: https://lore.kernel.org/oe-kbuild-all/202512302105.pmzYfmcV-lkp@intel.com/ Closes: https://lore.kernel.org/oe-kbuild-all/202512302125.FNgHwu5z-lkp@intel.com/ Closes: https://lore.kernel.org/oe-kbuild-all/202512302108.nIV8r5ES-lkp@intel.com/ Signed-off-by: Yuto Ohnuki <ytohnuki@amazon.com> Link: https://patch.msgid.link/20260226201857.27310-2-ytohnuki@amazon.com Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-03-20init/initramfs.c: trivial fix: FSM -> Finite-state machineAskar Safin
FSM means "finite-state machine", but I think this is not obvious to everyone. Signed-off-by: Askar Safin <safinaskar@gmail.com> Link: https://patch.msgid.link/20260319232721.452950-1-safinaskar@gmail.com Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-03-20ASoC: soc-component: add snd_soc_component_regmap_val_bytes()Mark Brown
Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> says: component has component->val_bytes which is set via snd_soc_component_setup_regmap(). But it can be calculated via component->regmap. No need to keep it as component->val_bytes. This patchset adds new snd_soc_component_regmap_val_bytes(), and remove component->val_bytes / snd_soc_component_setup_regmap(). Link: https://patch.msgid.link/87a4wdzyxf.wl-kuninori.morimoto.gx@renesas.com
2026-03-20ASoC: soc-component: remove component->val_bytesKuninori Morimoto
component has component->val_bytes which is set via snd_soc_component_setup_regmap(). But it can be calculated via component->regmap. No need to keep it as component->val_bytes. No one is using component->val_bytes. Remove it. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Link: https://patch.msgid.link/874imlzyv8.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
2026-03-20ASoC: soc-ops: use snd_soc_component_regmap_val_bytes()Kuninori Morimoto
component has component->val_bytes which is set via snd_soc_component_setup_regmap(). But it can be calculated via component->regmap. No need to keep it as component->val_bytes. Use snd_soc_component_regmap_val_bytes(). Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Link: https://patch.msgid.link/875x71zyw5.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
2026-03-20ASoC: tegra: use snd_soc_component_regmap_val_bytes()Kuninori Morimoto
component has component->val_bytes which is set via snd_soc_component_setup_regmap(). But it can be calculated via component->regmap. No need to keep it as component->val_bytes. Use snd_soc_component_regmap_val_bytes(). Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Link: https://patch.msgid.link/877brhzywd.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
2026-03-20ASoC: soc-component: add snd_soc_component_regmap_val_bytes()Kuninori Morimoto
component has component->val_bytes which is set via snd_soc_component_setup_regmap(). But it can be calculated via component->regmap. No need to keep it as component->val_bytes. Add snd_soc_component_regmap_val_bytes() for it. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Link: https://patch.msgid.link/878qbxzywo.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
generated by cgit v1.2.3 (git 2.25.1) at 2026-09-16 22:06:49 +0000