1. 26 Jul, 2023 4 commits
  2. 25 Jul, 2023 3 commits
  3. 20 Jul, 2023 6 commits
  4. 19 Jul, 2023 6 commits
  5. 12 Jul, 2023 1 commit
  6. 09 Jul, 2023 10 commits
  7. 08 Jul, 2023 10 commits
    • Hugh Dickins's avatar
      mm: lock newly mapped VMA with corrected ordering · 1c7873e3
      Hugh Dickins authored
      Lockdep is certainly right to complain about
      
        (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_write+0x2d/0x3f
                       but task is already holding lock:
        (&mapping->i_mmap_rwsem){+.+.}-{3:3}, at: mmap_region+0x4dc/0x6db
      
      Invert those to the usual ordering.
      
      Fixes: 33313a74 ("mm: lock newly mapped VMA which can be modified after it becomes visible")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarHugh Dickins <hughd@google.com>
      Tested-by: default avatarSuren Baghdasaryan <surenb@google.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1c7873e3
    • Linus Torvalds's avatar
      Merge tag 'mm-hotfixes-stable-2023-07-08-10-43' of... · 946c6b59
      Linus Torvalds authored
      Merge tag 'mm-hotfixes-stable-2023-07-08-10-43' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
      
      Pull hotfixes from Andrew Morton:
       "16 hotfixes. Six are cc:stable and the remainder address post-6.4
        issues"
      
      The merge undoes the disabling of the CONFIG_PER_VMA_LOCK feature, since
      it was all hopefully fixed in mainline.
      
      * tag 'mm-hotfixes-stable-2023-07-08-10-43' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
        lib: dhry: fix sleeping allocations inside non-preemptable section
        kasan, slub: fix HW_TAGS zeroing with slub_debug
        kasan: fix type cast in memory_is_poisoned_n
        mailmap: add entries for Heiko Stuebner
        mailmap: update manpage link
        bootmem: remove the vmemmap pages from kmemleak in free_bootmem_page
        MAINTAINERS: add linux-next info
        mailmap: add Markus Schneider-Pargmann
        writeback: account the number of pages written back
        mm: call arch_swap_restore() from do_swap_page()
        squashfs: fix cache race with migration
        mm/hugetlb.c: fix a bug within a BUG(): inconsistent pte comparison
        docs: update ocfs2-devel mailing list address
        MAINTAINERS: update ocfs2-devel mailing list address
        mm: disable CONFIG_PER_VMA_LOCK until its fixed
        fork: lock VMAs of the parent process when forking
      946c6b59
    • Suren Baghdasaryan's avatar
      fork: lock VMAs of the parent process when forking · fb49c455
      Suren Baghdasaryan authored
      When forking a child process, the parent write-protects anonymous pages
      and COW-shares them with the child being forked using copy_present_pte().
      
      We must not take any concurrent page faults on the source vma's as they
      are being processed, as we expect both the vma and the pte's behind it
      to be stable.  For example, the anon_vma_fork() expects the parents
      vma->anon_vma to not change during the vma copy.
      
      A concurrent page fault on a page newly marked read-only by the page
      copy might trigger wp_page_copy() and a anon_vma_prepare(vma) on the
      source vma, defeating the anon_vma_clone() that wasn't done because the
      parent vma originally didn't have an anon_vma, but we now might end up
      copying a pte entry for a page that has one.
      
      Before the per-vma lock based changes, the mmap_lock guaranteed
      exclusion with concurrent page faults.  But now we need to do a
      vma_start_write() to make sure no concurrent faults happen on this vma
      while it is being processed.
      
      This fix can potentially regress some fork-heavy workloads.  Kernel
      build time did not show noticeable regression on a 56-core machine while
      a stress test mapping 10000 VMAs and forking 5000 times in a tight loop
      shows ~5% regression.  If such fork time regression is unacceptable,
      disabling CONFIG_PER_VMA_LOCK should restore its performance.  Further
      optimizations are possible if this regression proves to be problematic.
      Suggested-by: default avatarDavid Hildenbrand <david@redhat.com>
      Reported-by: default avatarJiri Slaby <jirislaby@kernel.org>
      Closes: https://lore.kernel.org/all/dbdef34c-3a07-5951-e1ae-e9c6e3cdf51b@kernel.org/Reported-by: default avatarHolger Hoffstätte <holger@applied-asynchrony.com>
      Closes: https://lore.kernel.org/all/b198d649-f4bf-b971-31d0-e8433ec2a34c@applied-asynchrony.com/Reported-by: default avatarJacob Young <jacobly.alt@gmail.com>
      Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217624
      Fixes: 0bff0aae ("x86/mm: try VMA lock-based page fault handling first")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarSuren Baghdasaryan <surenb@google.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      fb49c455
    • Suren Baghdasaryan's avatar
      mm: lock newly mapped VMA which can be modified after it becomes visible · 33313a74
      Suren Baghdasaryan authored
      mmap_region adds a newly created VMA into VMA tree and might modify it
      afterwards before dropping the mmap_lock.  This poses a problem for page
      faults handled under per-VMA locks because they don't take the mmap_lock
      and can stumble on this VMA while it's still being modified.  Currently
      this does not pose a problem since post-addition modifications are done
      only for file-backed VMAs, which are not handled under per-VMA lock.
      However, once support for handling file-backed page faults with per-VMA
      locks is added, this will become a race.
      
      Fix this by write-locking the VMA before inserting it into the VMA tree.
      Other places where a new VMA is added into VMA tree do not modify it
      after the insertion, so do not need the same locking.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarSuren Baghdasaryan <surenb@google.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      33313a74
    • Suren Baghdasaryan's avatar
      mm: lock a vma before stack expansion · c137381f
      Suren Baghdasaryan authored
      With recent changes necessitating mmap_lock to be held for write while
      expanding a stack, per-VMA locks should follow the same rules and be
      write-locked to prevent page faults into the VMA being expanded. Add
      the necessary locking.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarSuren Baghdasaryan <surenb@google.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c137381f
    • Linus Torvalds's avatar
      Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 7fcd473a
      Linus Torvalds authored
      Pull more SCSI updates from James Bottomley:
       "A few late arriving patches that missed the initial pull request. It's
        mostly bug fixes (the dt-bindings is a fix for the initial pull)"
      
      * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        scsi: ufs: core: Remove unused function declaration
        scsi: target: docs: Remove tcm_mod_builder.py
        scsi: target: iblock: Quiet bool conversion warning with pr_preempt use
        scsi: dt-bindings: ufs: qcom: Fix ICE phandle
        scsi: core: Simplify scsi_cdl_check_cmd()
        scsi: isci: Fix comment typo
        scsi: smartpqi: Replace one-element arrays with flexible-array members
        scsi: target: tcmu: Replace strlcpy() with strscpy()
        scsi: ncr53c8xx: Replace strlcpy() with strscpy()
        scsi: lpfc: Fix lpfc_name struct packing
      7fcd473a
    • Linus Torvalds's avatar
      Merge tag 'i2c-for-6.5-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · 84dc5aa3
      Linus Torvalds authored
      Pull more i2c updates from Wolfram Sang:
      
       - xiic patch should have been in the original pull but slipped through
      
       - mpc patch fixes a build regression
      
       - nomadik cleanup
      
      * tag 'i2c-for-6.5-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: mpc: Drop unused variable
        i2c: nomadik: Remove a useless call in the remove function
        i2c: xiic: Don't try to handle more interrupt events after error
      84dc5aa3
    • Linus Torvalds's avatar
      Merge tag 'hardening-v6.5-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux · 8fc3b8f0
      Linus Torvalds authored
      Pull hardening fixes from Kees Cook:
      
       - Check for NULL bdev in LoadPin (Matthias Kaehlcke)
      
       - Revert unwanted KUnit FORTIFY build default
      
       - Fix 1-element array causing boot warnings with xhci-hub
      
      * tag 'hardening-v6.5-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
        usb: ch9: Replace bmSublinkSpeedAttr 1-element array with flexible array
        Revert "fortify: Allow KUnit test to build without FORTIFY"
        dm: verity-loadpin: Add NULL pointer check for 'bdev' parameter
      8fc3b8f0
    • Anup Sharma's avatar
      ntb: hw: amd: Fix debugfs_create_dir error checking · bff6efc5
      Anup Sharma authored
      The debugfs_create_dir function returns ERR_PTR in case of error, and the
      only correct way to check if an error occurred is 'IS_ERR' inline function.
      This patch will replace the null-comparison with IS_ERR.
      Signed-off-by: default avatarAnup Sharma <anupnewsmail@gmail.com>
      Suggested-by: default avatarIvan Orlov <ivan.orlov0322@gmail.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      bff6efc5
    • Linus Torvalds's avatar
      Merge tag 'perf-tools-for-v6.5-2-2023-07-06' of... · c206353d
      Linus Torvalds authored
      Merge tag 'perf-tools-for-v6.5-2-2023-07-06' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next
      
      Pull more perf tools updates from Namhyung Kim:
       "These are remaining changes and fixes for this cycle.
      
        Build:
      
         - Allow generating vmlinux.h from BTF using `make GEN_VMLINUX_H=1`
           and skip if the vmlinux has no BTF.
      
         - Replace deprecated clang -target xxx option by --target=xxx.
      
        perf record:
      
         - Print event attributes with well known type and config symbols in
           the debug output like below:
      
             # perf record -e cycles,cpu-clock -C0 -vv true
             <SNIP>
             ------------------------------------------------------------
             perf_event_attr:
               type                             0 (PERF_TYPE_HARDWARE)
               size                             136
               config                           0 (PERF_COUNT_HW_CPU_CYCLES)
               { sample_period, sample_freq }   4000
               sample_type                      IP|TID|TIME|CPU|PERIOD|IDENTIFIER
               read_format                      ID
               disabled                         1
               inherit                          1
               freq                             1
               sample_id_all                    1
               exclude_guest                    1
             ------------------------------------------------------------
             sys_perf_event_open: pid -1  cpu 0  group_fd -1  flags 0x8 = 5
             ------------------------------------------------------------
             perf_event_attr:
               type                             1 (PERF_TYPE_SOFTWARE)
               size                             136
               config                           0 (PERF_COUNT_SW_CPU_CLOCK)
               { sample_period, sample_freq }   4000
               sample_type                      IP|TID|TIME|CPU|PERIOD|IDENTIFIER
               read_format                      ID
               disabled                         1
               inherit                          1
               freq                             1
               sample_id_all                    1
               exclude_guest                    1
      
         - Update AMD IBS event error message since it now support per-process
           profiling but no priviledge filters.
      
             $ sudo perf record -e ibs_op//k -C 0
             Error:
             AMD IBS doesn't support privilege filtering. Try again without
             the privilege modifiers (like 'k') at the end.
      
        perf lock contention:
      
         - Support CSV style output using -x option
      
             $ sudo perf lock con -ab -x, sleep 1
             # output: contended, total wait, max wait, avg wait, type, caller
             19, 194232, 21415, 10222, spinlock, process_one_work+0x1f0
             15, 162748, 23843, 10849, rwsem:R, do_user_addr_fault+0x40e
             4, 86740, 23415, 21685, rwlock:R, ep_poll_callback+0x2d
             1, 84281, 84281, 84281, mutex, iwl_mvm_async_handlers_wk+0x135
             8, 67608, 27404, 8451, spinlock, __queue_work+0x174
             3, 58616, 31125, 19538, rwsem:W, do_mprotect_pkey+0xff
             3, 52953, 21172, 17651, rwlock:W, do_epoll_wait+0x248
             2, 30324, 19704, 15162, rwsem:R, do_madvise+0x3ad
             1, 24619, 24619, 24619, spinlock, rcu_core+0xd4
      
         - Add --output option to save the data to a file not to be interfered
           by other debug messages.
      
        Test:
      
         - Fix event parsing test on ARM where there's no raw PMU nor supports
           PERF_PMU_CAP_EXTENDED_HW_TYPE.
      
         - Update the lock contention test case for CSV output.
      
         - Fix a segfault in the daemon command test.
      
        Vendor events (JSON):
      
         - Add has_event() to check if the given event is available on system
           at runtime. On Intel machines, some transaction events may not be
           present when TSC extensions are disabled.
      
         - Update Intel event metrics.
      
        Misc:
      
         - Sort symbols by name using an external array of pointers instead of
           a rbtree node in the symbol. This will save 16-bytes or 24-bytes
           per symbol whether the sorting is actually requested or not.
      
         - Fix unwinding DWARF callstacks using libdw when --symfs option is
           used"
      
      * tag 'perf-tools-for-v6.5-2-2023-07-06' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next: (38 commits)
        perf test: Fix event parsing test when PERF_PMU_CAP_EXTENDED_HW_TYPE isn't supported.
        perf test: Fix event parsing test on Arm
        perf evsel amd: Fix IBS error message
        perf: unwind: Fix symfs with libdw
        perf symbol: Fix uninitialized return value in symbols__find_by_name()
        perf test: Test perf lock contention CSV output
        perf lock contention: Add --output option
        perf lock contention: Add -x option for CSV style output
        perf lock: Remove stale comments
        perf vendor events intel: Update tigerlake to 1.13
        perf vendor events intel: Update skylakex to 1.31
        perf vendor events intel: Update skylake to 57
        perf vendor events intel: Update sapphirerapids to 1.14
        perf vendor events intel: Update icelakex to 1.21
        perf vendor events intel: Update icelake to 1.19
        perf vendor events intel: Update cascadelakex to 1.19
        perf vendor events intel: Update meteorlake to 1.03
        perf vendor events intel: Add rocketlake events/metrics
        perf vendor metrics intel: Make transaction metrics conditional
        perf jevents: Support for has_event function
        ...
      c206353d