1. 14 Apr, 2020 2 commits
    • Linus Torvalds's avatar
      Merge tag 'for-5.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux · 6cc9306b
      Linus Torvalds authored
      Pull btrfs fixes from David Sterba:
       "We have a few regressions and one fix for stable:
         - revert fsync optimization
         - fix lost i_size update
         - fix a space accounting leak
         - build fix, add back definition of a deprecated ioctl flag
         - fix search condition for old roots in relocation"
      * tag 'for-5.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
        btrfs: re-instantiate the removed BTRFS_SUBVOL_CREATE_ASYNC definition
        btrfs: fix reclaim counter leak of space_info objects
        btrfs: make full fsyncs always operate on the entire file again
        btrfs: fix lost i_size update after cloning inline extent
        btrfs: check commit root generation in should_ignore_root
    • Linus Torvalds's avatar
      Merge tag 'afs-fixes-20200413' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs · f4cd6668
      Linus Torvalds authored
      Pull AFS fixes from David Howells:
       - Fix the decoding of fetched file status records so that the xdr
         pointer is advanced under all circumstances.
       - Fix the decoding of a fetched file status record that indicates an
         inline abort (ie. an error) so that it sets the flag saying the
         decoder stored the abort code.
       - Fix the decoding of the result of the rename operation so that it
         doesn't skip the decoding of the second fetched file status (ie. that
         of the dest dir) in the case that the source and dest dirs were the
         same as this causes the xdr pointer not to be advanced, leading to
         incorrect decoding of subsequent parts of the reply.
       - Fix the dump of a bad YFSFetchStatus record to dump the full length.
       - Fix a race between local editing of directory contents and accessing
         the dir for reading or d_revalidate by using the same lock in both.
       - Fix afs_d_revalidate() to not accidentally reverse the version on a
         dentry when it's meant to be bringing it forward.
      * tag 'afs-fixes-20200413' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
        afs: Fix afs_d_validate() to set the right directory version
        afs: Fix race between post-modification dir edit and readdir/d_revalidate
        afs: Fix length of dump of bad YFSFetchStatus record
        afs: Fix rename operation status delivery
        afs: Fix decoding of inline abort codes from version 1 status records
        afs: Fix missing XDR advance in xdr_decode_{AFS,YFS}FSFetchStatus()
  2. 13 Apr, 2020 7 commits
    • Geert Uytterhoeven's avatar
      m68k: Drop redundant generic-y += hardirq.h · ac4075bc
      Geert Uytterhoeven authored
      The cleanup in commit 630f289b ("asm-generic: make more
      kernel-space headers mandatory") did not take into account the recently
      added line for hardirq.h in commit acc45648 ("m68k: Switch to
      asm-generic/hardirq.h"), leading to the following message during the
          scripts/Makefile.asm-generic:25: redundant generic-y found in arch/m68k/include/asm/Kbuild: hardirq.h
      Fix this by dropping the now redundant line.
      Fixes: 630f289b
       ("asm-generic: make more kernel-space headers mandatory")
      Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
      Reviewed-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • David Howells's avatar
      afs: Fix afs_d_validate() to set the right directory version · 40fc8102
      David Howells authored
      If a dentry's version is somewhere between invalid_before and the current
      directory version, we should be setting it forward to the current version,
      not backwards to the invalid_before version.  Note that we're only doing
      this at all because dentry::d_fsdata isn't large enough on a 32-bit system.
      Fix this by using a separate variable for invalid_before so that we don't
      accidentally clobber the current dir version.
      Fixes: a4ff7401
       ("afs: Keep track of invalid-before version for dentry coherency")
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    • David Howells's avatar
      afs: Fix race between post-modification dir edit and readdir/d_revalidate · 2105c282
      David Howells authored
      AFS directories are retained locally as a structured file, with lookup
      being effected by a local search of the file contents.  When a modification
      (such as mkdir) happens, the dir file content is modified locally rather
      than redownloading the directory.
      The directory contents are accessed in a number of ways, with a number of
      different locks schemes:
       (1) Download of contents - dvnode->validate_lock/write in afs_read_dir().
       (2) Lookup and readdir - dvnode->validate_lock/read in afs_dir_iterate(),
           downgrading from (1) if necessary.
       (3) d_revalidate of child dentry - dvnode->validate_lock/read in
           afs_do_lookup_one() downgrading from (1) if necessary.
       (4) Edit of dir after modification - page locks on individual dir pages.
      Unfortunately, because (4) uses different locking scheme to (1) - (3),
      nothing protects against the page being scanned whilst the edit is
      underway.  Even download is not safe as it doesn't lock the pages - relying
      instead on the validate_lock to serialise as a whole (the theory being that
      directory contents are treated as a block and always downloaded as a
      Fix this by write-locking dvnode->validate_lock around the edits.  Care
      must be taken in the rename case as there may be two different dirs - but
      they need not be locked at the same time.  In any case, once the lock is
      taken, the directory version must be rechecked, and the edit skipped if a
      later version has been downloaded by revalidation (there can't have been
      any local changes because the VFS holds the inode lock, but there can have
      been remote changes).
      Fixes: 63a4681f
       ("afs: Locally edit directory data for mkdir/create/unlink/...")
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    • David Howells's avatar
      afs: Fix length of dump of bad YFSFetchStatus record · 3efe55b0
      David Howells authored
      Fix the length of the dump of a bad YFSFetchStatus record.  The function
      was copied from the AFS version, but the YFS variant contains bigger fields
      and extra information, so expand the dump to match.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    • David Howells's avatar
      afs: Fix rename operation status delivery · b98f0ec9
      David Howells authored
      The afs_deliver_fs_rename() and yfs_deliver_fs_rename() functions both only
      decode the second file status returned unless the parent directories are
      different - unfortunately, this means that the xdr pointer isn't advanced
      and the volsync record will be read incorrectly in such an instance.
      Fix this by always decoding the second status into the second
      status/callback block which wasn't being used if the dirs were the same.
      The afs_update_dentry_version() calls that update the directory data
      version numbers on the dentries can then unconditionally use the second
      status record as this will always reflect the state of the destination dir
      (the two records will be identical if the destination dir is the same as
      the source dir)
      Fixes: 260a9803 ("[AFS]: Add "directory write" support.")
      Fixes: 30062bd1
       ("afs: Implement YFS support in the fs client")
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    • David Howells's avatar
      afs: Fix decoding of inline abort codes from version 1 status records · 3e0d9892
      David Howells authored
      If we're decoding an AFSFetchStatus record and we see that the version is 1
      and the abort code is set and we're expecting inline errors, then we store
      the abort code and ignore the remaining status record (which is correct),
      but we don't set the flag to say we got a valid abort code.
      This can affect operation of YFS.RemoveFile2 when removing a file and the
      operation of {,Y}FS.InlineBulkStatus when prospectively constructing or
      updating of a set of inodes during a lookup.
      Fix this to indicate the reception of a valid abort code.
      Fixes: a38a7558
       ("afs: Fix unlink to handle YFS.RemoveFile2 better")
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    • David Howells's avatar
      afs: Fix missing XDR advance in xdr_decode_{AFS,YFS}FSFetchStatus() · c72057b5
      David Howells authored
      If we receive a status record that has VNOVNODE set in the abort field,
      xdr_decode_AFSFetchStatus() and xdr_decode_YFSFetchStatus() don't advance
      the XDR pointer, thereby corrupting anything subsequent decodes from the
      same block of data.
      This has the potential to affect AFS.InlineBulkStatus and
      YFS.InlineBulkStatus operation, but probably doesn't since the status
      records are extracted as individual blocks of data and the buffer pointer
      is reset between blocks.
      It does affect YFS.RemoveFile2 operation, corrupting the volsync record -
      though that is not currently used.
      Other operations abort the entire operation rather than returning an error
      inline, in which case there is no decoding to be done.
      Fix this by unconditionally advancing the xdr pointer.
      Fixes: 684b0f68
       ("afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility")
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
  3. 12 Apr, 2020 10 commits
    • Linus Torvalds's avatar
      Linux 5.7-rc1 · 8f3d9f35
      Linus Torvalds authored
    • Linus Torvalds's avatar
      MAINTAINERS: sort field names for all entries · 3b50142d
      Linus Torvalds authored
      This sorts the actual field names too, potentially causing even more
      chaos and confusion at merge time if you have edited the MAINTAINERS
      file.  But the end result is a more consistent layout, and hopefully
      it's a one-time pain minimized by doing this just before the -rc1
      This was entirely scripted:
        ./scripts/parse-maintainers.pl --input=MAINTAINERS --output=MAINTAINERS --order
      Requested-by: default avatarJoe Perches <joe@perches.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      MAINTAINERS: sort entries by entry name · 4400b7d6
      Linus Torvalds authored
      They are all supposed to be sorted, but people who add new entries don't
      always know the alphabet.  Plus sometimes the entry names get edited,
      and people don't then re-order the entry.
      Let's see how painful this will be for merging purposes (the MAINTAINERS
      file is often edited in various different trees), but Joe claims there's
      relatively few patches in -next that touch this, and doing it just
      before -rc1 is likely the best time.  Fingers crossed.
      This was scripted with
        /scripts/parse-maintainers.pl --input=MAINTAINERS --output=MAINTAINERS
      but then I also ended up manually upper-casing a few entry names that
      stood out when looking at the end result.
      Requested-by: default avatarJoe Perches <joe@perches.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      Merge tag 'x86-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 4f8a3cc1
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "A set of three patches to fix the fallout of the newly added split
        lock detection feature.
        It addressed the case where a KVM guest triggers a split lock #AC and
        KVM reinjects it into the guest which is not prepared to handle it.
        Add proper sanity checks which prevent the unconditional injection
        into the guest and handles the #AC on the host side in the same way as
        user space detections are handled. Depending on the detection mode it
        either warns and disables detection for the task or kills the task if
        the mode is set to fatal"
      * tag 'x86-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        KVM: VMX: Extend VMXs #AC interceptor to handle split lock #AC in guest
        KVM: x86: Emulate split-lock access as a write in emulator
        x86/split_lock: Provide handle_guest_split_lock()
    • Linus Torvalds's avatar
      Merge tag 'timers-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 0785249f
      Linus Torvalds authored
      Pull time(keeping) updates from Thomas Gleixner:
       - Fix the time_for_children symlink in /proc/$PID/ so it properly
         reflects that it part of the 'time' namespace
       - Add the missing userns limit for the allowed number of time
         namespaces, which was half defined but the actual array member was
         not added. This went unnoticed as the array has an exessive empty
         member at the end but introduced a user visible regression as the
         output was corrupted.
       - Prevent further silent ucount corruption by adding a BUILD_BUG_ON()
         to catch half updated data.
      * tag 'timers-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        ucount: Make sure ucounts in /proc/sys/user don't regress again
        time/namespace: Add max_time_namespaces ucount
        time/namespace: Fix time_for_children symlink
    • Linus Torvalds's avatar
      Merge tag 'sched-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 590680d1
      Linus Torvalds authored
      Pull scheduler fixes/updates from Thomas Gleixner:
       - Deduplicate the average computations in the scheduler core and the
         fair class code.
       - Fix a raise between runtime distribution and assignement which can
         cause exceeding the quota by up to 70%.
       - Prevent negative results in the imbalanace calculation
       - Remove a stale warning in the workqueue code which can be triggered
         since the call site was moved out of preempt disabled code. It's a
         false positive.
       - Deduplicate the print macros for procfs
       - Add the ucmap values to the SCHED_DEBUG procfs output for completness
      * tag 'sched-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/debug: Add task uclamp values to SCHED_DEBUG procfs
        sched/debug: Factor out printing formats into common macros
        sched/debug: Remove redundant macro define
        sched/core: Remove unused rq::last_load_update_tick
        workqueue: Remove the warning in wq_worker_sleeping()
        sched/fair: Fix negative imbalance in imbalance calculation
        sched/fair: Fix race between runtime distribution and assignment
        sched/fair: Align rq->avg_idle and rq->avg_scan_cost
    • Linus Torvalds's avatar
      Merge tag 'perf-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 20e2aa81
      Linus Torvalds authored
      Pull perf fixes from Thomas Gleixner:
       "Three fixes/updates for perf:
         - Fix the perf event cgroup tracking which tries to track the cgroup
           even for disabled events.
         - Add Ice Lake server support for uncore events
         - Disable pagefaults when retrieving the physical address in the
           sampling code"
      * tag 'perf-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/core: Disable page faults when getting phys address
        perf/x86/intel/uncore: Add Ice Lake server uncore support
        perf/cgroup: Correct indirection in perf_less_group_idx()
        perf/core: Fix event cgroup tracking
    • Linus Torvalds's avatar
      Merge tag 'locking-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 652fa53c
      Linus Torvalds authored
      Pull locking fixes from Thomas Gleixner:
       "Three small fixes/updates for the locking core code:
         - Plug a task struct reference leak in the percpu rswem
         - Document the refcount interaction with PID_MAX_LIMIT
         - Improve the 'invalid wait context' data dump in lockdep so it
           contains all information which is required to decode the problem"
      * tag 'locking-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        locking/lockdep: Improve 'invalid wait context' splat
        locking/refcount: Document interaction with PID_MAX_LIMIT
        locking/percpu-rwsem: Fix a task_struct refcount
    • Linus Torvalds's avatar
      Merge tag '5.7-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6 · 4119bf9f
      Linus Torvalds authored
      Pull cifs fixes from Steve French:
       "Ten cifs/smb fixes:
         - five RDMA (smbdirect) related fixes
         - add experimental support for swap over SMB3 mounts
         - also a fix which improves performance of signed connections"
      * tag '5.7-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
        smb3: enable swap on SMB3 mounts
        smb3: change noisy error message to FYI
        smb3: smbdirect support can be configured by default
        cifs: smbd: Do not schedule work to send immediate packet on every receive
        cifs: smbd: Properly process errors on ib_post_send
        cifs: Allocate crypto structures on the fly for calculating signatures of incoming packets
        cifs: smbd: Update receive credits before sending and deal with credits roll back on failure before sending
        cifs: smbd: Check send queue size before posting a send
        cifs: smbd: Merge code to track pending packets
        cifs: ignore cached share root handle closing errors
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-5.7-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs · 50bda5fa
      Linus Torvalds authored
      Pull NFS client bugfix from Trond Myklebust:
       "Fix an RCU read lock leakage in pnfs_alloc_ds_commits_list()"
      * tag 'nfs-for-5.7-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
        pNFS: Fix RCU lock leakage
  4. 11 Apr, 2020 14 commits
  5. 10 Apr, 2020 7 commits