1. 18 Jan, 2021 1 commit
  2. 17 Jan, 2021 4 commits
    • Linus Torvalds's avatar
      Merge tag 'perf-tools-fixes-2021-01-17' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux · e2da7836
      Linus Torvalds authored
      Pull perf tools fixes from Arnaldo Carvalho de Melo:
      
       - Fix 'CPU too large' error in Intel PT
      
       - Correct event attribute sizes in 'perf inject'
      
       - Sync build_bug.h and kvm.h kernel copies
      
       - Fix bpf.h header include directive in 5sec.c 'perf trace' bpf example
      
       - libbpf tests fixes
      
       - Fix shadow stat 'perf test' for non-bash shells
      
       - Take cgroups into account for shadow stats in 'perf stat'
      
      * tag 'perf-tools-fixes-2021-01-17' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
        perf inject: Correct event attribute sizes
        perf intel-pt: Fix 'CPU too large' error
        perf stat: Take cgroups into account for shadow stats
        perf stat: Introduce struct runtime_stat_data
        libperf tests: Fail when failing to get a tracepoint id
        libperf tests: If a test fails return non-zero
        libperf tests: Avoid uninitialized variable warning
        perf test: Fix shadow stat test for non-bash shells
        tools headers: Syncronize linux/build_bug.h with the kernel sources
        tools headers UAPI: Sync kvm.h headers with the kernel sources
        perf bpf examples: Fix bpf.h header include directive in 5sec.c example
      e2da7836
    • Linus Torvalds's avatar
      Merge tag 'powerpc-5.11-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · a1339d63
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       "One fix for a lack of alignment in our linker script, that can lead to
        crashes depending on configuration etc.
      
        One fix for the 32-bit VDSO after the C VDSO conversion.
      
        Thanks to Andreas Schwab, Ariel Marcovitch, and Christophe Leroy"
      
      * tag 'powerpc-5.11-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/vdso: Fix clock_gettime_fallback for vdso32
        powerpc: Fix alignment bug within the init sections
      a1339d63
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · a527a2b3
      Linus Torvalds authored
      Pull misc vfs fixes from Al Viro:
       "Several assorted fixes.
      
        I still think that audit ->d_name race is better fixed this way for
        the benefit of backports, with any possibly fancier variants done on
        top of it"
      
      * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        dump_common_audit_data(): fix racy accesses to ->d_name
        iov_iter: fix the uaccess area in copy_compat_iovec_from_user
        umount(2): move the flag validity checks first
      a527a2b3
    • Linus Torvalds's avatar
      mm: don't put pinned pages into the swap cache · feb889fb
      Linus Torvalds authored
      So technically there is nothing wrong with adding a pinned page to the
      swap cache, but the pinning obviously means that the page can't actually
      be free'd right now anyway, so it's a bit pointless.
      
      However, the real problem is not with it being a bit pointless: the real
      issue is that after we've added it to the swap cache, we'll try to unmap
      the page.  That will succeed, because the code in mm/rmap.c doesn't know
      or care about pinned pages.
      
      Even the unmapping isn't fatal per se, since the page will stay around
      in memory due to the pinning, and we do hold the connection to it using
      the swap cache.  But when we then touch it next and take a page fault,
      the logic in do_swap_page() will map it back into the process as a
      possibly read-only page, and we'll then break the page association on
      the next COW fault.
      
      Honestly, this issue could have been fixed in any of those other places:
      (a) we could refuse to unmap a pinned page (which makes conceptual
      sense), or (b) we could make sure to re-map a pinned page writably in
      do_swap_page(), or (c) we could just make do_wp_page() not COW the
      pinned page (which was what we historically did before that "mm:
      do_wp_page() simplification" commit).
      
      But while all of them are equally valid models for breaking this chain,
      not putting pinned pages into the swap cache in the first place is the
      simplest one by far.
      
      It's also the safest one: the reason why do_wp_page() was changed in the
      first place was that getting the "can I re-use this page" wrong is so
      fraught with errors.  If you do it wrong, you end up with an incorrectly
      shared page.
      
      As a result, using "page_maybe_dma_pinned()" in either do_wp_page() or
      do_swap_page() would be a serious bug since it is only a (very good)
      heuristic.  Re-using the page requires a hard black-and-white rule with
      no room for ambiguity.
      
      In contrast, saying "this page is very likely dma pinned, so let's not
      add it to the swap cache and try to unmap it" is an obviously safe thing
      to do, and if the heuristic might very rarely be a false positive, no
      harm is done.
      
      Fixes: 09854ba9
      
       ("mm: do_wp_page() simplification")
      Reported-and-tested-by: default avatarMartin Raiber <martin@urbackup.org>
      Cc: Pavel Begunkov <asml.silence@gmail.com>
      Cc: Jens Axboe <axboe@kernel.dk>
      Cc: Peter Xu <peterx@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      feb889fb
  3. 16 Jan, 2021 15 commits
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 0da0a8a0
      Linus Torvalds authored
      
      
      Pull SCSI fixes from James Bottomley:
       "Nine minor fixes, seven in drivers and two in the core SCSI disk
        driver (sd) which should be harmless involving removing an unused
        variable and quietening a spurious warning"
      Signed-off-by: default avatarJames E.J. Bottomley <jejb@linux.ibm.com>
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        scsi: sd: Remove obsolete variable in sd_remove()
        scsi: sd: Suppress spurious errors when WRITE SAME is being disabled
        scsi: scsi_debug: Fix memleak in scsi_debug_init()
        scsi: mpt3sas: Fix spelling mistake in Kconfig "compatiblity" -> "compatibility"
        scsi: qedi: Correct max length of CHAP secret
        scsi: ufs: Correct the LUN used in eh_device_reset_handler() callback
        scsi: ufs: Relocate flush of exceptional event
        scsi: ufs: Relax the condition of UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL
        scsi: ufs: Fix possible power drain during system suspend
      0da0a8a0
    • Al Viro's avatar
      dump_common_audit_data(): fix racy accesses to ->d_name · d36a1dd9
      Al Viro authored
      
      
      We are not guaranteed the locking environment that would prevent
      dentry getting renamed right under us.  And it's possible for
      old long name to be freed after rename, leading to UAF here.
      
      Cc: stable@kernel.org # v2.6.2+
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      d36a1dd9
    • Linus Torvalds's avatar
      Merge tag 'block-5.11-2021-01-16' of git://git.kernel.dk/linux-block · 54c6247d
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "Just an nvme pull request via Christoph:
      
         - don't initialize hwmon for discover controllers (Sagi Grimberg)
      
         - fix iov_iter handling in nvme-tcp (Sagi Grimberg)
      
         - fix a preempt warning in nvme-tcp (Sagi Grimberg)
      
         - fix a possible NULL pointer dereference in nvme (Israel Rukshin)"
      
      * tag 'block-5.11-2021-01-16' of git://git.kernel.dk/linux-block:
        nvme: don't intialize hwmon for discovery controllers
        nvme-tcp: fix possible data corruption with bio merges
        nvme-tcp: Fix warning with CONFIG_DEBUG_PREEMPT
        nvmet-rdma: Fix NULL deref when setting pi_enable and traddr INADDR_ANY
      54c6247d
    • Linus Torvalds's avatar
      Merge tag 'io_uring-5.11-2021-01-16' of git://git.kernel.dk/linux-block · 11c0239a
      Linus Torvalds authored
      Pull io_uring fixes from Jens Axboe:
       "We still have a pending fix for a cancelation issue, but it's still
        being investigated. In the meantime:
      
         - Dead mm handling fix (Pavel)
      
         - SQPOLL setup error handling (Pavel)
      
         - Flush timeout sequence fix (Marcelo)
      
         - Missing finish_wait() for one exit case"
      
      * tag 'io_uring-5.11-2021-01-16' of git://git.kernel.dk/linux-block:
        io_uring: ensure finish_wait() is always called in __io_uring_task_cancel()
        io_uring: flush timeouts that should already have expired
        io_uring: do sqo disable on install_fd error
        io_uring: fix null-deref in io_disable_sqo_submit
        io_uring: don't take files/mm for a dead task
        io_uring: drop mm and files after task_work_run
      11c0239a
    • Linus Torvalds's avatar
      Merge tag 'riscv-for-linus-5.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux · acda701b
      Linus Torvalds authored
      Pull RISC-V fixes from Palmer Dabbelt:
       "There are a few more fixes than a normal rc4, largely due to the
        bubble introduced by the holiday break:
      
         - return -ENOSYS for syscall number -1, which previously returned an
           uninitialized value.
      
         - ensure of_clk_init() has been called in time_init(), without which
           clock drivers may not be initialized.
      
         - fix sifive,uart0 driver to properly display the baud rate. A fix to
           initialize MPIE that allows interrupts to be processed during
           system calls.
      
         - avoid erronously begin tracing IRQs when interrupts are disabled,
           which at least triggers suprious lockdep failures.
      
         - workaround for a warning related to calling smp_processor_id()
           while preemptible. The warning itself is suprious on currently
           availiable systems.
      
         - properly include the generic time VDSO calls. A fix to our kasan
           address mapping. A fix to the HiFive Unleashed device tree, which
           allows the Ethernet PHY to be properly initialized by Linux (as
           opposed to relying on the bootloader).
      
         - defconfig update to include SiFive's GPIO driver, which is present
           on the HiFive Unleashed and necessary to initialize the PHY.
      
         - avoid allocating memory while initializing reserved memory.
      
         - avoid allocating the last 4K of memory, as pointers there alias
           with syscall errors.
      
        There are also two cleanups that should have no functional effect but
        do fix build warnings:
      
         - drop a duplicated definition of PAGE_KERNEL_EXEC.
      
         - properly declare the asm register SP shim.
      
         - cleanup the rv32 memory size Kconfig entry, to reflect the actual
           size of memory availiable"
      
      * tag 'riscv-for-linus-5.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
        RISC-V: Fix maximum allowed phsyical memory for RV32
        RISC-V: Set current memblock limit
        RISC-V: Do not allocate memblock while iterating reserved memblocks
        riscv: stacktrace: Move register keyword to beginning of declaration
        riscv: defconfig: enable gpio support for HiFive Unleashed
        dts: phy: add GPIO number and active state used for phy reset
        dts: phy: fix missing mdio device and probe failure of vsc8541-01 device
        riscv: Fix KASAN memory mapping.
        riscv: Fixup CONFIG_GENERIC_TIME_VSYSCALL
        riscv: cacheinfo: Fix using smp_processor_id() in preemptible
        riscv: Trace irq on only interrupt is enabled
        riscv: Drop a duplicated PAGE_KERNEL_EXEC
        riscv: Enable interrupts during syscalls with M-Mode
        riscv: Fix sifive serial driver
        riscv: Fix kernel time_init()
        riscv: return -ENOSYS for syscall -1
      acda701b
    • Linus Torvalds's avatar
      mm: don't play games with pinned pages in clear_page_refs · 9348b73c
      Linus Torvalds authored
      
      
      Turning a pinned page read-only breaks the pinning after COW.  Don't do it.
      
      The whole "track page soft dirty" state doesn't work with pinned pages
      anyway, since the page might be dirtied by the pinning entity without
      ever being noticed in the page tables.
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9348b73c
    • Linus Torvalds's avatar
      mm: fix clear_refs_write locking · 29a951df
      Linus Torvalds authored
      
      
      Turning page table entries read-only requires the mmap_sem held for
      writing.
      
      So stop doing the odd games with turning things from read locks to write
      locks and back.  Just get the write lock.
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      29a951df
    • Atish Patra's avatar
      RISC-V: Fix maximum allowed phsyical memory for RV32 · e5577937
      Atish Patra authored
      
      
      Linux kernel can only map 1GB of address space for RV32 as the page offset
      is set to 0xC0000000. The current description in the Kconfig is confusing
      as it indicates that RV32 can support 2GB of physical memory. That is
      simply not true for current kernel. In future, a 2GB split support can be
      added to allow 2GB physical address space.
      Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
      Signed-off-by: default avatarAtish Patra <atish.patra@wdc.com>
      Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
      e5577937
    • Atish Patra's avatar
      RISC-V: Set current memblock limit · abb8e86b
      Atish Patra authored
      
      
      Currently, linux kernel can not use last 4k bytes of addressable space
      because IS_ERR_VALUE macro treats those as an error. This will be an issue
      for RV32 as any memblock allocator potentially allocate chunk of memory
      from the end of DRAM (2GB) leading bad address error even though the
      address was technically valid.
      
      Fix this issue by limiting the memblock if available memory spans the
      entire address space.
      Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
      Signed-off-by: default avatarAtish Patra <atish.patra@wdc.com>
      Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
      abb8e86b
    • Atish Patra's avatar
      RISC-V: Do not allocate memblock while iterating reserved memblocks · 797f0375
      Atish Patra authored
      Currently, resource tree allocates memory blocks while iterating on the
      list. It leads to following kernel warning because memblock allocation
      also invokes memory block reservation API.
      
      [    0.000000] ------------[ cut here ]------------
      [    0.000000] WARNING: CPU: 0 PID: 0 at kernel/resource.c:795
      __insert_resource+0x8e/0xd0
      [    0.000000] Modules linked in:
      [    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted
      5.10.0-00022-ge20097fb37e2-dirty #549
      [    0.000000] epc: c00125c2 ra : c001262c sp : c1c01f50
      [    0.000000]  gp : c1d456e0 tp : c1c0a980 t0 : ffffcf20
      [    0.000000]  t1 : 00000000 t2 : 00000000 s0 : c1c01f60
      [    0.000000]  s1 : ffffcf00 a0 : ffffff00 a1 : c1c0c0c4
      [    0.000000]  a2 : 80c12b15 a3 : 80402000 a4 : 80402000
      [    0.000000]  a5 : c1c0c0c4 a6 : 80c12b15 a7 : f5faf600
      [    0.000000]  s2 : c1c0c0c4 s3 : c1c0e000 s4 : c1009a80
      [    0.000000]  s5 : c1c0c000 s6 : c1d48000 s7 : c1613b4c
      [    0.000000]  s8 : 00000fff s9 : 80000200 s10: c1613b40
      [    0.000000]  s11: 00000000 t3 : c1d4a000 t4 : ffffffff
      
      This is also unnecessary as we can pre-compute the total memblocks required
      for each memory region and allocate it before the loop. It save precious
      boot time not going through memblock allocation code every time.
      
      Fixes: 00ab027a
      
       ("RISC-V: Add kernel image sections to the resource tree")
      Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
      Tested-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
      Signed-off-by: default avatarAtish Patra <atish.patra@wdc.com>
      Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
      797f0375
    • Christoph Hellwig's avatar
      iov_iter: fix the uaccess area in copy_compat_iovec_from_user · a959a978
      Christoph Hellwig authored
      sizeof needs to be called on the compat pointer, not the native one.
      
      Fixes: 89cd35c5
      
       ("iov_iter: transparently handle compat iovecs in import_iovec")
      Reported-by: default avatarDavid Laight <David.Laight@ACULAB.COM>
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      a959a978
    • Linus Torvalds's avatar
      Merge tag 'for-5.11/dm-fixes-1' of... · 1d94330a
      Linus Torvalds authored
      Merge tag 'for-5.11/dm-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
      
      Pull device mapper fixes from Mike Snitzer:
      
       - Fix DM-raid's raid1 discard limits so discards work.
      
       - Select missing Kconfig dependencies for DM integrity and zoned
         targets.
      
       - Four fixes for DM crypt target's support to optionally bypass kcryptd
         workqueues.
      
       - Fix DM snapshot merge supports missing data flushes before committing
         metadata.
      
       - Fix DM integrity data device flushing when external metadata is used.
      
       - Fix DM integrity's maximum number of supported constructor arguments
         that user can request when creating an integrity device.
      
       - Eliminate DM core ioctl logging noise when an ioctl is issued without
         required CAP_SYS_RAWIO permission.
      
      * tag 'for-5.11/dm-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
        dm crypt: defer decryption to a tasklet if interrupts disabled
        dm integrity: fix the maximum number of arguments
        dm crypt: do not call bio_endio() from the dm-crypt tasklet
        dm integrity: fix flush with external metadata device
        dm: eliminate potential source of excessive kernel log noise
        dm snapshot: flush merged data before committing metadata
        dm crypt: use GFP_ATOMIC when allocating crypto requests from softirq
        dm crypt: do not wait for backlogged crypto request completion in softirq
        dm zoned: select CONFIG_CRC32
        dm integrity: select CRYPTO_SKCIPHER
        dm raid: fix discard limits for raid1
      1d94330a
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · b45e2da6
      Linus Torvalds authored
      Merge misc fixes from Andrew Morton:
       "10 patches.
      
        Subsystems affected by this patch series: MAINTAINERS and mm (slub,
        pagealloc, memcg, kasan, vmalloc, migration, hugetlb, memory-failure,
        and process_vm_access)"
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>:
        mm/process_vm_access.c: include compat.h
        mm,hwpoison: fix printing of page flags
        MAINTAINERS: add Vlastimil as slab allocators maintainer
        mm/hugetlb: fix potential missing huge page size info
        mm: migrate: initialize err in do_migrate_pages
        mm/vmalloc.c: fix potential memory leak
        arm/kasan: fix the array size of kasan_early_shadow_pte[]
        mm/memcontrol: fix warning in mem_cgroup_page_lruvec()
        mm/page_alloc: add a missing mm_page_alloc_zone_locked() tracepoint
        mm, slub: consider rest of partial list if acquire_slab() fails
      b45e2da6
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma · 8cbe71e7
      Linus Torvalds authored
      Pull rdma fixes from Jason Gunthorpe:
       "A fairly modest set of bug fixes, nothing abnormal from the merge
        window
      
        The ucma patch is a bit on the larger side, but given the regression
        was recently added I've opted to forward it to the rc stream.
      
         - Fix a ucma memory leak introduced in v5.9 while fixing the
           Syzkaller bugs
      
         - Don't fail when the xarray wraps for user verbs objects
      
         - User triggerable oops regression from the umem page size rework
      
         - Error unwind bugs in usnic, ocrdma, mlx5 and cma"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
        RDMA/cma: Fix error flow in default_roce_mode_store
        RDMA/mlx5: Fix wrong free of blue flame register on error
        IB/mlx5: Fix error unwinding when set_has_smi_cap fails
        RDMA/umem: Avoid undefined behavior of rounddown_pow_of_two()
        RDMA/ocrdma: Fix use after free in ocrdma_dealloc_ucontext_pd()
        RDMA/usnic: Fix memleak in find_free_vf_and_create_qp_grp
        RDMA/restrack: Don't treat as an error allocation ID wrapping
        RDMA/ucma: Do not miss ctx destruction steps in some cases
      8cbe71e7
    • Jens Axboe's avatar
      io_uring: ensure finish_wait() is always called in __io_uring_task_cancel() · a8d13dbc
      Jens Axboe authored
      
      
      If we enter with requests pending and performm cancelations, we'll have
      a different inflight count before and after calling prepare_to_wait().
      This causes the loop to restart. If we actually ended up canceling
      everything, or everything completed in-between, then we'll break out
      of the loop without calling finish_wait() on the waitqueue. This can
      trigger a warning on exit_signals(), as we leave the task state in
      TASK_UNINTERRUPTIBLE.
      
      Put a finish_wait() after the loop to catch that case.
      
      Cc: stable@vger.kernel.org # 5.9+
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      a8d13dbc
  4. 15 Jan, 2021 20 commits
    • Linus Torvalds's avatar
      Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 0bc9bc1d
      Linus Torvalds authored
      Pull ext4 fixes from Ted Ts'o:
       "A number of bug fixes for ext4:
      
         - Fix for the new fast_commit feature
      
         - Fix some error handling codepaths in whiteout handling and
           mountpoint sampling
      
         - Fix how we write ext4_error information so it goes through the
           journal when journalling is active, to avoid races that can lead to
           lost error information, superblock checksum failures, or DIF/DIX
           features"
      
      * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        ext4: remove expensive flush on fast commit
        ext4: fix bug for rename with RENAME_WHITEOUT
        ext4: fix wrong list_splice in ext4_fc_cleanup
        ext4: use IS_ERR instead of IS_ERR_OR_NULL and set inode null when IS_ERR
        ext4: don't leak old mountpoint samples
        ext4: drop ext4_handle_dirty_super()
        ext4: fix superblock checksum failure when setting password salt
        ext4: use sbi instead of EXT4_SB(sb) in ext4_update_super()
        ext4: save error info to sb through journal if available
        ext4: protect superblock modifications with a buffer lock
        ext4: drop sync argument of ext4_commit_super()
        ext4: combine ext4_handle_error() and save_error_info()
      0bc9bc1d
    • Linus Torvalds's avatar
      Merge tag '5.11-rc3-smb3' of git://git.samba.org/sfrench/cifs-2.6 · 7cd3c412
      Linus Torvalds authored
      Pull cifs fixes from Steve French:
       "Two small cifs fixes for stable (including an important handle leak
        fix) and three small cleanup patches"
      
      * tag '5.11-rc3-smb3' of git://git.samba.org/sfrench/cifs-2.6:
        cifs: style: replace one-element array with flexible-array
        cifs: connect: style: Simplify bool comparison
        fs: cifs: remove unneeded variable in smb3_fs_context_dup
        cifs: fix interrupted close commands
        cifs: check pointer before freeing
      7cd3c412
    • Linus Torvalds's avatar
      Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 82821be8
      Linus Torvalds authored
      Pull arm64 fixes from Catalin Marinas:
      
       - Set the minimum GCC version to 5.1 for arm64 due to earlier compiler
         bugs.
      
       - Make atomic helpers __always_inline to avoid a section mismatch when
         compiling with clang.
      
       - Fix the CMA and crashkernel reservations to use ZONE_DMA (remove the
         arm64_dma32_phys_limit variable, no longer needed with a dynamic
         ZONE_DMA sizing in 5.11).
      
       - Remove redundant IRQ flag tracing that was leaving lockdep
         inconsistent with the hardware state.
      
       - Revert perf events based hard lockup detector that was causing
         smp_processor_id() to be called in preemptible context.
      
       - Some trivial cleanups - spelling fix, renaming S_FRAME_SIZE to
         PT_REGS_SIZE, function prototypes added.
      
      * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
        arm64: selftests: Fix spelling of 'Mismatch'
        arm64: syscall: include prototype for EL0 SVC functions
        compiler.h: Raise minimum version of GCC to 5.1 for arm64
        arm64: make atomic helpers __always_inline
        arm64: rename S_FRAME_SIZE to PT_REGS_SIZE
        Revert "arm64: Enable perf events based hard lockup detector"
        arm64: entry: remove redundant IRQ flag tracing
        arm64: Remove arm64_dma32_phys_limit and its uses
      82821be8
    • Linus Torvalds's avatar
      Merge tag 'mips_fixes_5.11.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux · f288c895
      Linus Torvalds authored
      Pull MIPS fixes from Thomas Bogendoerfer:
      
       - fix coredumps on 64bit kernels
      
       - fix for alignment bugs preventing booting
      
       - fix checking for failed irq_alloc_desc calls
      
      * tag 'mips_fixes_5.11.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
        MIPS: OCTEON: fix unreachable code in octeon_irq_init_ciu
        MIPS: relocatable: fix possible boot hangup with KASLR enabled
        MIPS: Fix malformed NT_FILE and NT_SIGINFO in 32bit coredumps
        MIPS: boot: Fix unaligned access with CONFIG_MIPS_RAW_APPENDED_DTB
      f288c895
    • Al Grant's avatar
      perf inject: Correct event attribute sizes · 648b054a
      Al Grant authored
      
      
      When 'perf inject' reads a perf.data file from an older version of perf,
      it writes event attributes into the output with the original size field,
      but lays them out as if they had the size currently used. Readers see a
      corrupt file. Update the size field to match the layout.
      Signed-off-by: default avatarAl Grant <al.grant@foss.arm.com>
      Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Link: http://lore.kernel.org/lkml/20201124195818.30603-1-al.grant@arm.com
      
      Signed-off-by: default avatarDenis Nikitin <denik@chromium.org>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      648b054a
    • Adrian Hunter's avatar
      perf intel-pt: Fix 'CPU too large' error · 5501e922
      Adrian Hunter authored
      In some cases, the number of cpus (nr_cpus_online) is confused with the
      maximum cpu number (nr_cpus_avail), which results in the error in the
      example below:
      
      Example on system with 8 cpus:
      
       Before:
         # echo 0 > /sys/devices/system/cpu/cpu2/online
         # ./perf record --kcore -e intel_pt// taskset --cpu-list 7 uname
         Linux
         [ perf record: Woken up 1 times to write data ]
         [ perf record: Captured and wrote 0.147 MB perf.data ]
         # ./perf script --itrace=e
         Requested CPU 7 too large. Consider raising MAX_NR_CPUS
         0x25908 [0x8]: failed to process type: 68 [Invalid argument]
      
       After:
         # ./perf script --itrace=e
         #
      
      Fixes: 8c727469 ("perf machine: Replace MAX_NR_CPUS with perf_env::nr_cpus_online")
      Fixes: 7df4e36a
      
       ("perf session: Replace MAX_NR_CPUS with perf_env::nr_cpus_online")
      Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
      Tested-by: default avatarKan Liang <kan.liang@linux.intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: stable@vger.kernel.org
      Link: http://lore.kernel.org/lkml/20210107174159.24897-1-adrian.hunter@intel.com
      
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      5501e922
    • Namhyung Kim's avatar
      perf stat: Take cgroups into account for shadow stats · a1bf2305
      Namhyung Kim authored
      
      
      As of now it doesn't consider cgroups when collecting shadow stats and
      metrics so counter values from different cgroups will be saved in a same
      slot.  This resulted in incorrect numbers when those cgroups have
      different workloads.
      
      For example, let's look at the scenario below: cgroups A and C runs same
      workload which burns a cpu while cgroup B runs a light workload.
      
        $ perf stat -a -e cycles,instructions --for-each-cgroup A,B,C  sleep 1
      
         Performance counter stats for 'system wide':
      
           3,958,116,522      cycles                A
           6,722,650,929      instructions          A #    2.53  insn per cycle
               1,132,741      cycles                B
                 571,743      instructions          B #    0.00  insn per cycle
           4,007,799,935      cycles                C
           6,793,181,523      instructions          C #    2.56  insn per cycle
      
             1.001050869 seconds time elapsed
      
      When I run 'perf stat' with single workload, it usually shows IPC around
      1.7.  We can verify it (6,722,650,929.0 / 3,958,116,522 = 1.698) for cgroup A.
      
      But in this case, since cgroups are ignored, cycles are averaged so it
      used the lower value for IPC calculation and resulted in around 2.5.
      
        avg cycle: (3958116522 + 1132741 + 4007799935) / 3 = 2655683066
        IPC (A)  :  6722650929 / 2655683066 = 2.531
        IPC (B)  :      571743 / 2655683066 = 0.0002
        IPC (C)  :  6793181523 / 2655683066 = 2.557
      
      We can simply compare cgroup pointers in the evsel and it'll be NULL
      when cgroups are not specified.  With this patch, I can see correct
      numbers like below:
      
        $ perf stat -a -e cycles,instructions --for-each-cgroup A,B,C  sleep 1
      
        Performance counter stats for 'system wide':
      
           4,171,051,687      cycles                A
           7,219,793,922      instructions          A #    1.73  insn per cycle
               1,051,189      cycles                B
                 583,102      instructions          B #    0.55  insn per cycle
           4,171,124,710      cycles                C
           7,192,944,580      instructions          C #    1.72  insn per cycle
      
             1.007909814 seconds time elapsed
      Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
      Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Ian Rogers <irogers@google.com>
      Cc: Jin Yao <yao.jin@linux.intel.com>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lore.kernel.org/lkml/20210115071139.257042-2-namhyung@kernel.org
      
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      a1bf2305
    • Namhyung Kim's avatar
      perf stat: Introduce struct runtime_stat_data · 3ff1e718
      Namhyung Kim authored
      
      
      To pass more info to the saved_value in the runtime_stat, add a new
      struct runtime_stat_data.  Currently it only has 'ctx' field but later
      patch will add more.
      
      Note that we intentionally pass 0 as ctx to clock-related events for
      compatibility.  It was already there in a few places.  So move the code
      into the saved_value_lookup() explicitly and add a comment.
      Suggested-by: default avatarAndi Kleen <ak@linux.intel.com>
      Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
      Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Ian Rogers <irogers@google.com>
      Cc: Jin Yao <yao.jin@linux.intel.com>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lore.kernel.org/lkml/20210115071139.257042-1-namhyung@kernel.org
      
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      3ff1e718
    • Ian Rogers's avatar
      libperf tests: Fail when failing to get a tracepoint id · 66dd86b2
      Ian Rogers authored
      
      
      Permissions are necessary to get a tracepoint id. Fail the test when the
      read fails.
      Signed-off-by: default avatarIan Rogers <irogers@google.com>
      Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lore.kernel.org/lkml/20210114180250.3853825-2-irogers@google.com
      
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      66dd86b2
    • Ian Rogers's avatar
      libperf tests: If a test fails return non-zero · bba2ea17
      Ian Rogers authored
      
      
      If a test fails return -1 rather than 0. This is consistent with the
      return value in test-cpumap.c
      Signed-off-by: default avatarIan Rogers <irogers@google.com>
      Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lore.kernel.org/lkml/20210114180250.3853825-1-irogers@google.com
      
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      bba2ea17
    • Ian Rogers's avatar
      libperf tests: Avoid uninitialized variable warning · be82fddc
      Ian Rogers authored
      
      
      The variable 'bf' is read (for a write call) without being initialized
      triggering a memory sanitizer warning. Use 'bf' in the read and switch
      the write to reading from a string.
      Signed-off-by: default avatarIan Rogers <irogers@google.com>
      Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
      Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lore.kernel.org/lkml/20210114212304.4018119-1-irogers@google.com
      
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      be82fddc
    • Daejun Park's avatar
      ext4: remove expensive flush on fast commit · e9f53353
      Daejun Park authored
      
      
      In the fast commit, it adds REQ_FUA and REQ_PREFLUSH on each fast
      commit block when barrier is enabled.  However, in recovery phase,
      ext4 compares CRC value in the tail.  So it is sufficient to add
      REQ_FUA and REQ_PREFLUSH on the block that has tail.
      Signed-off-by: default avatarDaejun Park <daejun7.park@samsung.com>
      Reviewed-by: default avatarHarshad Shirwadkar <harshadshirwadkar@gmail.com>
      Link: https://lore.kernel.org/r/20210106013242epcms2p5b6b4ed8ca86f29456fdf56aa580e74b4@epcms2p5
      
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      e9f53353
    • yangerkun's avatar
      ext4: fix bug for rename with RENAME_WHITEOUT · 6b4b8e6b
      yangerkun authored
      
      
      We got a "deleted inode referenced" warning cross our fsstress test. The
      bug can be reproduced easily with following steps:
      
        cd /dev/shm
        mkdir test/
        fallocate -l 128M img
        mkfs.ext4 -b 1024 img
        mount img test/
        dd if=/dev/zero of=test/foo bs=1M count=128
        mkdir test/dir/ && cd test/dir/
        for ((i=0;i<1000;i++)); do touch file$i; done # consume all block
        cd ~ && renameat2(AT_FDCWD, /dev/shm/test/dir/file1, AT_FDCWD,
          /dev/shm/test/dir/dst_file, RENAME_WHITEOUT) # ext4_add_entry in
          ext4_rename will return ENOSPC!!
        cd /dev/shm/ && umount test/ && mount img test/ && ls -li test/dir/file1
        We will get the output:
        "ls: cannot access 'test/dir/file1': Structure needs cleaning"
        and the dmesg show:
        "EXT4-fs error (device loop0): ext4_lookup:1626: inode #2049: comm ls:
        deleted inode referenced: 139"
      
      ext4_rename will create a special inode for whiteout and use this 'ino'
      to replace the source file's dir entry 'ino'. Once error happens
      latter(the error above was the ENOSPC return from ext4_add_entry in
      ext4_rename since all space has been consumed), the cleanup do drop the
      nlink for whiteout, but forget to restore 'ino' with source file. This
      will trigger the bug describle as above.
      Signed-off-by: default avataryangerkun <yangerkun@huawei.com>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      Cc: stable@vger.kernel.org
      Fixes: cd808dec ("ext4: support RENAME_WHITEOUT")
      Link: https://lore.kernel.org/r/20210105062857.3566-1-yangerkun@huawei.com
      
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      6b4b8e6b
    • Daejun Park's avatar
      ext4: fix wrong list_splice in ext4_fc_cleanup · 31e203e0
      Daejun Park authored
      After full/fast commit, entries in staging queue are promoted to main
      queue. In ext4_fs_cleanup function, it splice to staging queue to
      staging queue.
      
      Fixes: aa75f4d3
      
       ("ext4: main fast-commit commit path")
      Signed-off-by: default avatarDaejun Park <daejun7.park@samsung.com>
      Reviewed-by: default avatarHarshad Shirwadkar <harshadshirwadkar@gmail.com>
      Link: https://lore.kernel.org/r/20201230094851epcms2p6eeead8cc984379b37b2efd21af90fd1a@epcms2p6
      
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      Cc: stable@kernel.org
      31e203e0
    • Yi Li's avatar
      ext4: use IS_ERR instead of IS_ERR_OR_NULL and set inode null when IS_ERR · 23dd561a
      Yi Li authored
      1: ext4_iget/ext4_find_extent never returns NULL, use IS_ERR
      instead of IS_ERR_OR_NULL to fix this.
      
      2: ext4_fc_replay_inode should set the inode to NULL when IS_ERR.
      and go to call iput properly.
      
      Fixes: 8016e29f
      
       ("ext4: fast commit recovery path")
      Signed-off-by: default avatarYi Li <yili@winhong.com>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      Link: https://lore.kernel.org/r/20201230033827.3996064-1-yili@winhong.com
      
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      Cc: stable@kernel.org
      23dd561a
    • Namhyung Kim's avatar
      perf test: Fix shadow stat test for non-bash shells · a042a82d
      Namhyung Kim authored
      
      
      It was using some bash-specific features and failed to parse when
      running with a different shell like below:
      
        root@kbl-ppc:~/kbl-ws/perf-dev/lck-9077/acme.tmp/tools/perf# ./perf test 83 -vv
        83: perf stat metrics (shadow stat) test                            :
        --- start ---
        test child forked, pid 3922
        ./tests/shell/stat+shadow_stat.sh: 19: ./tests/shell/stat+shadow_stat.sh: [[: not found
        ./tests/shell/stat+shadow_stat.sh: 24: ./tests/shell/stat+shadow_stat.sh: [[: not found
        ./tests/shell/stat+shadow_stat.sh: 30: ./tests/shell/stat+shadow_stat.sh: [[: not found
        (standard_in) 2: syntax error
        ./tests/shell/stat+shadow_stat.sh: 36: ./tests/shell/stat+shadow_stat.sh: [[: not found
        ./tests/shell/stat+shadow_stat.sh: 19: ./tests/shell/stat+shadow_stat.sh: [[: not found
        ./tests/shell/stat+shadow_stat.sh: 24: ./tests/shell/stat+shadow_stat.sh: [[: not found
        ./tests/shell/stat+shadow_stat.sh: 30: ./tests/shell/stat+shadow_stat.sh: [[: not found
        (standard_in) 2: syntax error
        ./tests/shell/stat+shadow_stat.sh: 36: ./tests/shell/stat+shadow_stat.sh: [[: not found
        ./tests/shell/stat+shadow_stat.sh: 45: ./tests/shell/stat+shadow_stat.sh: declare: not found
        test child finished with -1
        ---- end ----
        perf stat metrics (shadow stat) test: FAILED!
      Reported-by: default avatarJin Yao <yao.jin@linux.intel.com>
      Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
      Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: David Laight <david.laight@aculab.com>
      Cc: Ian Rogers <irogers@google.com>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lore.kernel.org/lkml/20210114050609.1258820-1-namhyung@kernel.org
      
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      a042a82d
    • Arnaldo Carvalho de Melo's avatar
      tools headers: Syncronize linux/build_bug.h with the kernel sources · addbdff2
      Arnaldo Carvalho de Melo authored
      To pick up the changes in:
      
        3a176b94
      
       ("Revert "kbuild: avoid static_assert for genksyms"")
      
      And silence this perf build warning:
      
        Warning: Kernel ABI header at 'tools/include/linux/build_bug.h' differs from latest version at 'include/linux/build_bug.h'
        diff -u tools/include/linux/build_bug.h include/linux/build_bug.h
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: Ian Rogers <irogers@google.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Masahiro Yamada <masahiroy@kernel.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      addbdff2
    • Arnaldo Carvalho de Melo's avatar
      tools headers UAPI: Sync kvm.h headers with the kernel sources · 38c53947
      Arnaldo Carvalho de Melo authored
      To pick the changes in:
      
        647daca2
      
       ("KVM: SVM: Add support for booting APs in an SEV-ES guest")
      
      That don't cause any tooling change, just silences this perf build
      warning:
      
        Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
        diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: Ian Rogers <irogers@google.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Tom Lendacky <thomas.lendacky@amd.com>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      38c53947
    • Arnaldo Carvalho de Melo's avatar
      perf bpf examples: Fix bpf.h header include directive in 5sec.c example · 301f0203
      Arnaldo Carvalho de Melo authored
      
      
      It was looking at bpf/bpf.h, which caused this problem:
      
        # perf trace -e tools/perf/examples/bpf/5sec.c
        /home/acme/git/perf/tools/perf/examples/bpf/5sec.c:42:10: fatal error: 'bpf/bpf.h' file not found
        #include <bpf/bpf.h>
                 ^~~~~~~~~~~
        1 error generated.
        ERROR:	unable to compile tools/perf/examples/bpf/5sec.c
        Hint:	Check error message shown above.
        Hint:	You can also pre-compile it into .o using:
             		clang -target bpf -O2 -c tools/perf/examples/bpf/5sec.c
             	with proper -I and -D options.
        event syntax error: 'tools/perf/examples/bpf/5sec.c'
                             \___ Failed to load tools/perf/examples/bpf/5sec.c from source: Error when compiling BPF scriptlet
        #
      
      Change that to plain bpf.h, to make it work again:
      
        # perf trace -e tools/perf/examples/bpf/5sec.c sleep 5s
             0.000 perf_bpf_probe:hrtimer_nanosleep(__probe_ip: -1776891872, rqtp: 5000000000)
        # perf trace -e tools/perf/examples/bpf/5sec.c/max-stack=16/ sleep 5s
             0.000 perf_bpf_probe:hrtimer_nanosleep(__probe_ip: -1776891872, rqtp: 5000000000)
                                               hrtimer_nanosleep ([kernel.kallsyms])
                                               common_nsleep ([kernel.kallsyms])
                                               __x64_sys_clock_nanosleep ([kernel.kallsyms])
                                               do_syscall_64 ([kernel.kallsyms])
                                               entry_SYSCALL_64_after_hwframe ([kernel.kallsyms])
                                               __clock_nanosleep_2 (/usr/lib64/libc-2.32.so)
        # perf trace -e tools/perf/examples/bpf/5sec.c sleep 4s
        #
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: Ian Rogers <irogers@google.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      301f0203
    • Linus Torvalds's avatar
      Merge tag 'acpi-5.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · f4e087c6
      Linus Torvalds authored
      Pull ACPI fixes from Rafael Wysocki:
       "These address a device ID bounds check error in the device enumeration
        code and fix a mistake in the documentation.
      
        Specifics:
      
         - Harden the ACPI device enumeration code against device ID length
           overflows to address a Linux VM cash on Hyper-V (Dexuan Cui).
      
         - Fix a mistake in the documentation of error type values for PCIe
           errors (Qiuxu Zhuo)"
      
      * tag 'acpi-5.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        Documentation: ACPI: EINJ: Fix error type values for PCIe errors
        ACPI: scan: Harden acpi_device_add() against device ID overflows
      f4e087c6