1. 06 May, 2019 1 commit
  2. 01 May, 2019 1 commit
  3. 28 Apr, 2019 1 commit
    • Masahiro Yamada's avatar
      unicode: refactor the rule for regenerating utf8data.h · 28ba53c0
      Masahiro Yamada authored
      scripts/mkutf8data is used only when regenerating utf8data.h,
      which never happens in the normal kernel build. However, it is
      irrespectively built if CONFIG_UNICODE is enabled.
      
      Moreover, there is no good reason for it to reside in the scripts/
      directory since it is only used in fs/unicode/.
      
      Hence, move it from scripts/ to fs/unicode/.
      
      In some cases, we bypass build artifacts in the normal build. The
      conventional way to do so is to surround the code with ifdef REGENERATE_*.
      
      For example,
      
       - 7373f4f8 ("kbuild: add implicit rules for parser generation")
       - 6aaf49b4 ("crypto: arm,arm64 - Fix random regeneration of S_shipped")
      
      I rewrote the rule in a more kbuild'ish style.
      
      In the normal build, utf8data.h is just shipped from the check-in file.
      
      $ make
        [ snip ]
        SHIPPED fs/unicode/utf8data.h
        CC      fs/unicode/utf8-norm.o
        CC      fs/unicode/utf8-core.o
        CC      fs/unicode/utf8-selftest.o
        AR      fs/unicode/built-in.a
      
      If you want to generate utf8data.h based on UCD, put *.txt files into
      fs/unicode/, then pass REGENERATE_UTF8DATA=1 from the command line.
      The mkutf8data tool will be automatically compiled to generate the
      utf8data.h from the *.txt files.
      
      $ make REGENERATE_UTF8DATA=1
        [ snip ]
        HOSTCC  fs/unicode/mkutf8data
        GEN     fs/unicode/utf8data.h
        CC      fs/unicode/utf8-norm.o
        CC      fs/unicode/utf8-core.o
        CC      fs/unicode/utf8-selftest.o
        AR      fs/unicode/built-in.a
      
      I renamed the check-in utf8data.h to utf8data.h_shipped so that this
      will work for the out-of-tree build.
      
      You can update it based on the latest UCD like this:
      
      $ make REGENERATE_UTF8DATA=1 fs/unicode/
      $ cp fs/unicode/utf8data.h fs/unicode/utf8data.h_shipped
      
      Also, I added entries to .gitignore and dontdiff.
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      28ba53c0
  4. 25 Apr, 2019 14 commits
    • Gabriel Krisman Bertazi's avatar
      docs: ext4.rst: document case-insensitive directories · 0a790fe4
      Gabriel Krisman Bertazi authored
      Introduces the case-insensitive features on ext4 for system
      administrators.  Explain the minimum of design decisions that are
      important for sysadmins wanting to enable this feature.
      Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.co.uk>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      0a790fe4
    • Gabriel Krisman Bertazi's avatar
      ext4: Support case-insensitive file name lookups · b886ee3e
      Gabriel Krisman Bertazi authored
      This patch implements the actual support for case-insensitive file name
      lookups in ext4, based on the feature bit and the encoding stored in the
      superblock.
      
      A filesystem that has the casefold feature set is able to configure
      directories with the +F (EXT4_CASEFOLD_FL) attribute, enabling lookups
      to succeed in that directory in a case-insensitive fashion, i.e: match
      a directory entry even if the name used by userspace is not a byte per
      byte match with the disk name, but is an equivalent case-insensitive
      version of the Unicode string.  This operation is called a
      case-insensitive file name lookup.
      
      The feature is configured as an inode attribute applied to directories
      and inherited by its children.  This attribute can only be enabled on
      empty directories for filesystems that support the encoding feature,
      thus preventing collision of file names that only differ by case.
      
      * dcache handling:
      
      For a +F directory, Ext4 only stores the first equivalent name dentry
      used in the dcache. This is done to prevent unintentional duplication of
      dentries in the dcache, while also allowing the VFS code to quickly find
      the right entry in the cache despite which equivalent string was used in
      a previous lookup, without having to resort to ->lookup().
      
      d_hash() of casefolded directories is implemented as the hash of the
      casefolded string, such that we always have a well-known bucket for all
      the equivalencies of the same string. d_compare() uses the
      utf8_strncasecmp() infrastructure, which handles the comparison of
      equivalent, same case, names as well.
      
      For now, negative lookups are not inserted in the dcache, since they
      would need to be invalidated anyway, because we can't trust missing file
      dentries.  This is bad for performance but requires some leveraging of
      the vfs layer to fix.  We can live without that for now, and so does
      everyone else.
      
      * on-disk data:
      
      Despite using a specific version of the name as the internal
      representation within the dcache, the name stored and fetched from the
      disk is a byte-per-byte match with what the user requested, making this
      implementation 'name-preserving'. i.e. no actual information is lost
      when writing to storage.
      
      DX is supported by modifying the hashes used in +F directories to make
      them case/encoding-aware.  The new disk hashes are calculated as the
      hash of the full casefolded string, instead of the string directly.
      This allows us to efficiently search for file names in the htree without
      requiring the user to provide an exact name.
      
      * Dealing with invalid sequences:
      
      By default, when a invalid UTF-8 sequence is identified, ext4 will treat
      it as an opaque byte sequence, ignoring the encoding and reverting to
      the old behavior for that unique file.  This means that case-insensitive
      file name lookup will not work only for that file.  An optional bit can
      be set in the superblock telling the filesystem code and userspace tools
      to enforce the encoding.  When that optional bit is set, any attempt to
      create a file name using an invalid UTF-8 sequence will fail and return
      an error to userspace.
      
      * Normalization algorithm:
      
      The UTF-8 algorithms used to compare strings in ext4 is implemented
      lives in fs/unicode, and is based on a previous version developed by
      SGI.  It implements the Canonical decomposition (NFD) algorithm
      described by the Unicode specification 12.1, or higher, combined with
      the elimination of ignorable code points (NFDi) and full
      case-folding (CF) as documented in fs/unicode/utf8_norm.c.
      
      NFD seems to be the best normalization method for EXT4 because:
      
        - It has a lower cost than NFC/NFKC (which requires
          decomposing to NFD as an intermediary step)
        - It doesn't eliminate important semantic meaning like
          compatibility decompositions.
      
      Although:
      
        - This implementation is not completely linguistic accurate, because
        different languages have conflicting rules, which would require the
        specialization of the filesystem to a given locale, which brings all
        sorts of problems for removable media and for users who use more than
        one language.
      Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.co.uk>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      b886ee3e
    • Gabriel Krisman Bertazi's avatar
      ext4: include charset encoding information in the superblock · c83ad55e
      Gabriel Krisman Bertazi authored
      Support for encoding is considered an incompatible feature, since it has
      potential to create collisions of file names in existing filesystems.
      If the feature flag is not enabled, the entire filesystem will operate
      on opaque byte sequences, respecting the original behavior.
      
      The s_encoding field stores a magic number indicating the encoding
      format and version used globally by file and directory names in the
      filesystem.  The s_encoding_flags defines policies for using the charset
      encoding, like how to handle invalid sequences.  The magic number is
      mapped to the exact charset table, but the mapping is specific to ext4.
      Since we don't have any commitment to support old encodings, the only
      encoding I am supporting right now is utf8-12.1.0.
      
      The current implementation prevents the user from enabling encoding and
      per-directory encryption on the same filesystem at the same time.  The
      incompatibility between these features lies in how we do efficient
      directory searches when we cannot be sure the encryption of the user
      provided fname will match the actual hash stored in the disk without
      decrypting every directory entry, because of normalization cases.  My
      quickest solution is to simply block the concurrent use of these
      features for now, and enable it later, once we have a better solution.
      Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.co.uk>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      c83ad55e
    • Gabriel Krisman Bertazi's avatar
    • Gabriel Krisman Bertazi's avatar
      unicode: update unicode database unicode version 12.1.0 · 1215d239
      Gabriel Krisman Bertazi authored
      Regenerate utf8data.h based on the latest UCD files and run tests
      against the latest version.
      Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      1215d239
    • Gabriel Krisman Bertazi's avatar
      unicode: introduce test module for normalized utf8 implementation · f0d6cc00
      Gabriel Krisman Bertazi authored
      This implements a in-kernel sanity test module for the utf8
      normalization core.  At probe time, it will run basic sequences through
      the utf8n core, to identify problems will equivalent sequences and
      normalization/casefold code.  This is supposed to be useful for
      regression testing when adding support for a new version of utf8 to
      linux.
      Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.co.uk>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      f0d6cc00
    • Gabriel Krisman Bertazi's avatar
      unicode: implement higher level API for string handling · 9d53690f
      Gabriel Krisman Bertazi authored
      This patch integrates the utf8n patches with some higher level API to
      perform UTF-8 string comparison, normalization and casefolding
      operations.  Implemented is a variation of NFD, and casefold is
      performed by doing full casefold on top of NFD.  These algorithms are
      based on the core implemented by Olaf Weber from SGI.
      Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.co.uk>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      9d53690f
    • Olaf Weber's avatar
      unicode: reduce the size of utf8data[] · a8384c68
      Olaf Weber authored
      Remove the Hangul decompositions from the utf8data trie, and do
      algorithmic decomposition to calculate them on the fly. To store the
      decomposition the caller of utf8lookup()/utf8nlookup() must provide a
      12-byte buffer, which is used to synthesize a leaf with the
      decomposition. This significantly reduces the size of the utf8data[]
      array.
      
      Changes made by Gabriel:
        Rebase to mainline
        Fix checkpatch errors
        Extract robustness fixes and merge back to original mkutf8data.c patch
        Regenerate utf8data.h
      Signed-off-by: default avatarOlaf Weber <olaf@sgi.com>
      Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.co.uk>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      a8384c68
    • Olaf Weber's avatar
      unicode: introduce code for UTF-8 normalization · 44594c2f
      Olaf Weber authored
      Supporting functions for UTF-8 normalization are in utf8norm.c with the
      header utf8norm.h. Two normalization forms are supported: nfdi and
      nfdicf.
      
        nfdi:
         - Apply unicode normalization form NFD.
         - Remove any Default_Ignorable_Code_Point.
      
        nfdicf:
         - Apply unicode normalization form NFD.
         - Remove any Default_Ignorable_Code_Point.
         - Apply a full casefold (C + F).
      
      For the purposes of the code, a string is valid UTF-8 if:
      
       - The values encoded are 0x1..0x10FFFF.
       - The surrogate codepoints 0xD800..0xDFFFF are not encoded.
       - The shortest possible encoding is used for all values.
      
      The supporting functions work on null-terminated strings (utf8 prefix)
      and on length-limited strings (utf8n prefix).
      
      From the original SGI patch and for conformity with coding standards,
      the utf8data_t typedef was dropped, since it was just masking the struct
      keyword.  On other occasions, namely utf8leaf_t and utf8trie_t, I
      decided to keep it, since they are simple pointers to memory buffers,
      and using uchars here wouldn't provide any more meaningful information.
      
      From the original submission, we also converted from the compatibility
      form to canonical.
      
      Changes made by Gabriel:
        Rebase to Mainline
        Fix up checkpatch.pl warnings
        Drop typedefs
        move out of libxfs
        Convert from NFKD to NFD
      Signed-off-by: default avatarOlaf Weber <olaf@sgi.com>
      Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.co.uk>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      44594c2f
    • Gabriel Krisman Bertazi's avatar
      unicode: introduce UTF-8 character database · 955405d1
      Gabriel Krisman Bertazi authored
      The decomposition and casefolding of UTF-8 characters are described in a
      prefix tree in utf8data.h, which is a generate from the Unicode
      Character Database (UCD), published by the Unicode Consortium, and
      should not be edited by hand.  The structures in utf8data.h are meant to
      be used for lookup operations by the unicode subsystem, when decoding a
      utf-8 string.
      
      mkutf8data.c is the source for a program that generates utf8data.h. It
      was written by Olaf Weber from SGI and originally proposed to be merged
      into Linux in 2014.  The original proposal performed the compatibility
      decomposition, NFKD, but the current version was modified by me to do
      canonical decomposition, NFD, as suggested by the community.  The
      changes from the original submission are:
      
        * Rebase to mainline.
        * Fix out-of-tree-build.
        * Update makefile to build 11.0.0 ucd files.
        * drop references to xfs.
        * Convert NFKD to NFD.
        * Merge back robustness fixes from original patch. Requested by
          Dave Chinner.
      
      The original submission is archived at:
      
      <https://linux-xfs.oss.sgi.narkive.com/Xx10wjVY/rfc-unicode-utf-8-support-for-xfs>
      
      The utf8data.h file can be regenerated using the instructions in
      fs/unicode/README.utf8data.
      
      - Notes on the update from 8.0.0 to 11.0:
      
      The structure of the ucd files and special cases have not experienced
      any changes between versions 8.0.0 and 11.0.0.  8.0.0 saw the addition
      of Cherokee LC characters, which is an interesting case for
      case-folding.  The update is accompanied by new tests on the test_ucd
      module to catch specific cases.  No changes to mkutf8data script were
      required for the updates.
      Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.co.uk>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      955405d1
    • Kirill Tkhai's avatar
      ext4: actually request zeroing of inode table after grow · 310a997f
      Kirill Tkhai authored
      It is never possible, that number of block groups decreases,
      since only online grow is supported.
      
      But after a growing occured, we have to zero inode tables
      for just created new block groups.
      
      Fixes: 19c5246d ("ext4: add new online resize interface")
      Signed-off-by: default avatarKirill Tkhai <ktkhai@virtuozzo.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      Cc: stable@kernel.org
      310a997f
    • Khazhismel Kumykov's avatar
    • Barret Rhoden's avatar
      ext4: fix use-after-free race with debug_want_extra_isize · 7bc04c5c
      Barret Rhoden authored
      When remounting with debug_want_extra_isize, we were not performing the
      same checks that we do during a normal mount.  That allowed us to set a
      value for s_want_extra_isize that reached outside the s_inode_size.
      
      Fixes: e2b911c5 ("ext4: clean up feature test macros with predicate functions")
      Reported-by: syzbot+f584efa0ac7213c226b7@syzkaller.appspotmail.com
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      Signed-off-by: default avatarBarret Rhoden <brho@google.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      Cc: stable@vger.kernel.org
      7bc04c5c
    • Pan Bian's avatar
      ext4: avoid drop reference to iloc.bh twice · 8c380ab4
      Pan Bian authored
      The reference to iloc.bh has been dropped in ext4_mark_iloc_dirty.
      However, the reference is dropped again if error occurs during
      ext4_handle_dirty_metadata, which may result in use-after-free bugs.
      
      Fixes: fb265c9c("ext4: add ext4_sb_bread() to disambiguate ENOMEM cases")
      Signed-off-by: default avatarPan Bian <bianpan2016@163.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      Cc: stable@kernel.org
      8c380ab4
  5. 10 Apr, 2019 2 commits
  6. 07 Apr, 2019 2 commits
    • Arnd Bergmann's avatar
      ext4: use BUG() instead of BUG_ON(1) · 1e83bc81
      Arnd Bergmann authored
      BUG_ON(1) leads to bogus warnings from clang when
      CONFIG_PROFILE_ANNOTATED_BRANCHES is set:
      
       fs/ext4/inode.c:544:4: error: variable 'retval' is used uninitialized whenever 'if' condition is false
            [-Werror,-Wsometimes-uninitialized]
                              BUG_ON(1);
                              ^~~~~~~~~
       include/asm-generic/bug.h:61:36: note: expanded from macro 'BUG_ON'
                                         ^~~~~~~~~~~~~~~~~~~
       include/linux/compiler.h:48:23: note: expanded from macro 'unlikely'
                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       fs/ext4/inode.c:591:6: note: uninitialized use occurs here
              if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
                  ^~~~~~
       fs/ext4/inode.c:544:4: note: remove the 'if' if its condition is always true
                              BUG_ON(1);
                              ^
       include/asm-generic/bug.h:61:32: note: expanded from macro 'BUG_ON'
                                     ^
       fs/ext4/inode.c:502:12: note: initialize the variable 'retval' to silence this warning
      
      Change it to BUG() so clang can see that this code path can never
      continue.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      Reviewed-by: default avatarNick Desaulniers <ndesaulniers@google.com>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      1e83bc81
    • Liu Xiang's avatar
      ext4: fix prefetchw of NULL page · d454a273
      Liu Xiang authored
      In ext4_mpage_readpages(), if the parameter pages is not NULL, another
      parameter page is NULL. At the first time prefetchw(&page->flags)
      works on NULL. From second time, prefetchw(&page->flags) always works on
      the last consumed page. This might do little improvment for handling
      current page. So prefetchw() should be called while the page pointer
      has just been updated.
      Signed-off-by: default avatarLiu Xiang <liu.xiang6@zte.com.cn>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      d454a273
  7. 06 Apr, 2019 4 commits
  8. 31 Mar, 2019 9 commits
    • Linus Torvalds's avatar
      Linux 5.1-rc3 · 79a3aaa7
      Linus Torvalds authored
      79a3aaa7
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 63fc9c23
      Linus Torvalds authored
      Pull KVM fixes from Paolo Bonzini:
       "A collection of x86 and ARM bugfixes, and some improvements to
        documentation.
      
        On top of this, a cleanup of kvm_para.h headers, which were exported
        by some architectures even though they not support KVM at all. This is
        responsible for all the Kbuild changes in the diffstat"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (28 commits)
        Documentation: kvm: clarify KVM_SET_USER_MEMORY_REGION
        KVM: doc: Document the life cycle of a VM and its resources
        KVM: selftests: complete IO before migrating guest state
        KVM: selftests: disable stack protector for all KVM tests
        KVM: selftests: explicitly disable PIE for tests
        KVM: selftests: assert on exit reason in CR4/cpuid sync test
        KVM: x86: update %rip after emulating IO
        x86/kvm/hyper-v: avoid spurious pending stimer on vCPU init
        kvm/x86: Move MSR_IA32_ARCH_CAPABILITIES to array emulated_msrs
        KVM: x86: Emulate MSR_IA32_ARCH_CAPABILITIES on AMD hosts
        kvm: don't redefine flags as something else
        kvm: mmu: Used range based flushing in slot_handle_level_range
        KVM: export <linux/kvm_para.h> and <asm/kvm_para.h> iif KVM is supported
        KVM: x86: remove check on nr_mmu_pages in kvm_arch_commit_memory_region()
        kvm: nVMX: Add a vmentry check for HOST_SYSENTER_ESP and HOST_SYSENTER_EIP fields
        KVM: SVM: Workaround errata#1096 (insn_len maybe zero on SMAP violation)
        KVM: Reject device ioctls from processes other than the VM's creator
        KVM: doc: Fix incorrect word ordering regarding supported use of APIs
        KVM: x86: fix handling of role.cr4_pae and rename it to 'gpte_size'
        KVM: nVMX: Do not inherit quadrant and invalid for the root shadow EPT
        ...
      63fc9c23
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 915ee0da
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "A pile of x86 updates:
      
         - Prevent exceeding he valid physical address space in the /dev/mem
           limit checks.
      
         - Move all header content inside the header guard to prevent compile
           failures.
      
         - Fix the bogus __percpu annotation in this_cpu_has() which makes
           sparse very noisy.
      
         - Disable switch jump tables completely when retpolines are enabled.
      
         - Prevent leaking the trampoline address"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/realmode: Make set_real_mode_mem() static inline
        x86/cpufeature: Fix __percpu annotation in this_cpu_has()
        x86/mm: Don't exceed the valid physical address space
        x86/retpolines: Disable switch jump tables when retpolines are enabled
        x86/realmode: Don't leak the trampoline kernel address
        x86/boot: Fix incorrect ifdeffery scope
        x86/resctrl: Remove unused variable
      915ee0da
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 590627f7
      Linus Torvalds authored
      Pull perf tooling fixes from Thomas Gleixner:
       "Core libraries:
         - Fix max perf_event_attr.precise_ip detection.
         - Fix parser error for uncore event alias
         - Fixup ordering of kernel maps after obtaining the main kernel map
           address.
      
        Intel PT:
         - Fix TSC slip where A TSC packet can slip past MTC packets so that
           the timestamp appears to go backwards.
         - Fixes for exported-sql-viewer GUI conversion to python3.
      
        ARM coresight:
         - Fix the build by adding a missing case value for enumeration value
           introduced in newer library, that now is the required one.
      
        tool headers:
         - Syncronize kernel headers with the kernel, getting new io_uring and
           pidfd_send_signal syscalls so that 'perf trace' can handle them"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf pmu: Fix parser error for uncore event alias
        perf scripts python: exported-sql-viewer.py: Fix python3 support
        perf scripts python: exported-sql-viewer.py: Fix never-ending loop
        perf machine: Update kernel map address and re-order properly
        tools headers uapi: Sync powerpc's asm/kvm.h copy with the kernel sources
        tools headers: Update x86's syscall_64.tbl and uapi/asm-generic/unistd
        tools headers uapi: Update drm/i915_drm.h
        tools arch x86: Sync asm/cpufeatures.h with the kernel sources
        tools headers uapi: Sync linux/fcntl.h to get the F_SEAL_FUTURE_WRITE addition
        tools headers uapi: Sync asm-generic/mman-common.h and linux/mman.h
        perf evsel: Fix max perf_event_attr.precise_ip detection
        perf intel-pt: Fix TSC slip
        perf cs-etm: Add missing case value
      590627f7
    • Linus Torvalds's avatar
      Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · c29d8541
      Linus Torvalds authored
      Pull CPU hotplug fixes from Thomas Gleixner:
       "Two SMT/hotplug related fixes:
      
         - Prevent crash when HOTPLUG_CPU is disabled and the CPU bringup
           aborts. This is triggered with the 'nosmt' command line option, but
           can happen by any abort condition. As the real unplug code is not
           compiled in, prevent the fail by keeping the CPU in zombie state.
      
         - Enforce HOTPLUG_CPU for SMP on x86 to avoid the above situation
           completely. With 'nosmt' being a popular option it's required to
           unplug the half brought up sibling CPUs (due to the MCE wreckage)
           completely"
      
      * 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/smp: Enforce CONFIG_HOTPLUG_CPU when SMP=y
        cpu/hotplug: Prevent crash when CPU bringup fails on CONFIG_HOTPLUG_CPU=n
      c29d8541
    • Linus Torvalds's avatar
      Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 573efdc5
      Linus Torvalds authored
      Pull locking fixlet from Thomas Gleixner:
       "Trivial update to the maintainers file"
      
      * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        MAINTAINERS: Remove deleted file from futex file pattern
      573efdc5
    • Linus Torvalds's avatar
      Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · f78b5be2
      Linus Torvalds authored
      Pull core fixes from Thomas Gleixner:
       "A small set of core updates:
      
         - Make the watchdog respect the selected CPU mask again. That was
           broken by the rework of the watchdog thread management and caused
           inconsistent state and NMI watchdog being unstoppable.
      
         - Ensure that the objtool build can find the libelf location.
      
         - Remove dead kcore stub code"
      
      * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        watchdog: Respect watchdog cpumask on CPU hotplug
        objtool: Query pkg-config for libelf location
        proc/kcore: Remove unused kclist_add_remap()
      f78b5be2
    • Linus Torvalds's avatar
      Merge tag 'powerpc-5.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 6536c5f2
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       "Three non-regression fixes.
      
         - Our optimised memcmp could read past the end of one of the buffers
           and potentially trigger a page fault leading to an oops.
      
         - Some of our code to read energy management data on PowerVM had an
           endian bug leading to bogus results.
      
         - When reporting a machine check exception we incorrectly reported
           TLB multihits as D-Cache multhits due to a missing entry in the
           array of causes.
      
        Thanks to: Chandan Rajendra, Gautham R. Shenoy, Mahesh Salgaonkar,
        Segher Boessenkool, Vaidyanathan Srinivasan"
      
      * tag 'powerpc-5.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/pseries/mce: Fix misleading print for TLB mutlihit
        powerpc/pseries/energy: Use OF accessor functions to read ibm,drc-indexes
        powerpc/64: Fix memcmp reading past the end of src/dest
      6536c5f2
    • Linus Torvalds's avatar
      Merge tag 'dmaengine-fix-5.1-rc3' of git://git.infradead.org/users/vkoul/slave-dma · c877b3df
      Linus Torvalds authored
      Pull dmaengine fixes from Vinod Koul:
      
       - Revert "dmaengine: stm32-mdma: Add a check on read_u32_array" as that
         caused regression
      
       - Fix MAINTAINER file uniphier-mdmac.c file path
      
      * tag 'dmaengine-fix-5.1-rc3' of git://git.infradead.org/users/vkoul/slave-dma:
        MAINTAINERS: Fix uniphier-mdmac.c file path
        dmaengine: stm32-mdma: Revert "dmaengine: stm32-mdma: Add a check on read_u32_array"
      c877b3df
  9. 30 Mar, 2019 6 commits
    • Linus Torvalds's avatar
      Merge tag 'led-fixes-for-5.1-rc3' of... · b5c8314f
      Linus Torvalds authored
      Merge tag 'led-fixes-for-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
      
      Pull LED fixes from Jacek Anaszewski:
      
       - fix refcnt leak on interface rename
      
       - use memcpy in device_name_store() to avoid including garbage from a
         previous, longer value in the device_name
      
       - fix a potential NULL pointer dereference in case of_match_device()
         cannot find a match
      
      * tag 'led-fixes-for-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
        leds: trigger: netdev: use memcpy in device_name_store
        leds: pca9532: fix a potential NULL pointer dereference
        leds: trigger: netdev: fix refcnt leak on interface rename
      b5c8314f
    • Linus Torvalds's avatar
      Merge tag 'gpio-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio · 3af9a525
      Linus Torvalds authored
      Pull GPIO fixes from Linus Walleij:
       "As you can see [in the git history] I was away on leave and Bartosz
        kindly stepped in and collected a slew of fixes, I pulled them into my
        tree in two sets and merged some two more fixes (fixing my own caused
        bugs) on top.
      
        Summary:
      
         - Revert the extended use of gpio_set_config() and think about how we
           can do this properly.
      
         - Fix up the SPI CS GPIO handling so it now works properly on the SPI
           bus children, as intended.
      
         - Error paths and driver fixes"
      
      * tag 'gpio-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
        gpio: mockup: use simple_read_from_buffer() in debugfs read callback
        gpio: of: Fix of_gpiochip_add() error path
        gpio: of: Check for "spi-cs-high" in child instead of parent node
        gpio: of: Check propname before applying "cs-gpios" quirks
        gpio: mockup: fix debugfs read
        Revert "gpio: use new gpio_set_config() helper in more places"
        gpio: aspeed: fix a potential NULL pointer dereference
        gpio: amd-fch: Fix bogus SPDX identifier
        gpio: adnp: Fix testing wrong value in adnp_gpio_direction_input
        gpio: exar: add a check for the return value of ida_simple_get fails
      3af9a525
    • Rasmus Villemoes's avatar
      leds: trigger: netdev: use memcpy in device_name_store · 90934643
      Rasmus Villemoes authored
      If userspace doesn't end the input with a newline (which can easily
      happen if the write happens from a C program that does write(fd,
      iface, strlen(iface))), we may end up including garbage from a
      previous, longer value in the device_name. For example
      
      # cat device_name
      
      # printf 'eth12' > device_name
      # cat device_name
      eth12
      # printf 'eth3' > device_name
      # cat device_name
      eth32
      
      I highly doubt anybody is relying on this behaviour, so switch to
      simply copying the bytes (we've already checked that size is <
      IFNAMSIZ) and unconditionally zero-terminate it; of course, we also
      still have to strip a trailing newline.
      
      This is also preparation for future patches.
      
      Fixes: 06f502f5 ("leds: trigger: Introduce a NETDEV trigger")
      Signed-off-by: default avatarRasmus Villemoes <linux@rasmusvillemoes.dk>
      Acked-by: default avatarPavel Machek <pavel@ucw.cz>
      Signed-off-by: default avatarJacek Anaszewski <jacek.anaszewski@gmail.com>
      90934643
    • Kangjie Lu's avatar
      leds: pca9532: fix a potential NULL pointer dereference · 0aab8e4d
      Kangjie Lu authored
      In case of_match_device cannot find a match, return -EINVAL to avoid
      NULL pointer dereference.
      
      Fixes: fa4191a6 ("leds: pca9532: Add device tree support")
      Signed-off-by: default avatarKangjie Lu <kjlu@umn.edu>
      Signed-off-by: default avatarJacek Anaszewski <jacek.anaszewski@gmail.com>
      0aab8e4d
    • Linus Torvalds's avatar
      Merge tag 'staging-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · 32faca66
      Linus Torvalds authored
      Pull staging driver fixes from Greg KH:
       "Here are some small staging driver fixes for 5.1-rc3, and one driver
        removal.
      
        The biggest thing here is the removal of the mt7621-eth driver as a
        "real" network driver was merged in 5.1-rc1 for this hardware, so this
        old driver can now be removed.
      
        Other than that, there are just a number of small fixes, all resolving
        reported issues and some potential corner cases for error handling
        paths.
      
        All of these have been in linux-next with no reported issues"
      
      * tag 'staging-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
        staging: vt6655: Remove vif check from vnt_interrupt
        staging: erofs: keep corrupted fs from crashing kernel in erofs_readdir()
        staging: octeon-ethernet: fix incorrect PHY mode
        staging: vc04_services: Fix an error code in vchiq_probe()
        staging: erofs: fix error handling when failed to read compresssed data
        staging: vt6655: Fix interrupt race condition on device start up.
        staging: rtlwifi: Fix potential NULL pointer dereference of kzalloc
        staging: rtl8712: uninitialized memory in read_bbreg_hdl()
        staging: rtlwifi: rtl8822b: fix to avoid potential NULL pointer dereference
        staging: rtl8188eu: Fix potential NULL pointer dereference of kcalloc
        staging, mt7621-pci: fix build without pci support
        staging: speakup_soft: Fix alternate speech with other synths
        staging: axis-fifo: add CONFIG_OF dependency
        staging: olpc_dcon_xo_1: add missing 'const' qualifier
        staging: comedi: ni_mio_common: Fix divide-by-zero for DIO cmdtest
        staging: erofs: fix to handle error path of erofs_vmap()
        staging: mt7621-dts: update ethernet settings.
        staging: remove mt7621-eth
      32faca66
    • Linus Torvalds's avatar
      Merge tag 'tty-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 52afe190
      Linus Torvalds authored
      Pull tty/serial fixes from Greg KH:
       "Here are some small tty and serial driver fixes for 5.1-rc3.
      
        Nothing major here, just a number of potential problems fixes for
        error handling paths, as well as some other minor bugfixes for
        reported issues with 5.1-rc1.
      
        All of these have been in linux-next with no reported issues"
      
      * tag 'tty-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        tty: fix NULL pointer issue when tty_port ops is not set
        Disable kgdboc failed by echo space to /sys/module/kgdboc/parameters/kgdboc
        dt-bindings: serial: Add compatible for Mediatek MT8183
        tty/serial: atmel: RS485 HD w/DMA: enable RX after TX is stopped
        tty/serial: atmel: Add is_half_duplex helper
        serial: sh-sci: Fix setting SCSCR_TIE while transferring data
        serial: ar933x_uart: Fix build failure with disabled console
        tty: serial: qcom_geni_serial: Initialize baud in qcom_geni_console_setup
        sc16is7xx: missing unregister/delete driver on error in sc16is7xx_init()
        tty: mxs-auart: fix a potential NULL pointer dereference
        tty: atmel_serial: fix a potential NULL pointer dereference
        serial: max310x: Fix to avoid potential NULL pointer dereference
        serial: mvebu-uart: Fix to avoid a potential NULL pointer dereference
      52afe190