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  1. 15 Jun, 2023 2 commits
    • Li Lingfeng's avatar
      dm thin metadata: check fail_io before using data_sm · cb65b282
      Li Lingfeng authored 
      Must check pmd->fail_io before using pmd->data_sm since
pmd->data_sm may be destroyed by other processes.

       P1(kworker)                             P2(message)
do_worker
 process_prepared
  process_prepared_discard_passdown_pt2
   dm_pool_dec_data_range
                                    pool_message
                                     commit
                                      dm_pool_commit_metadata
                                        ↓
                                       // commit failed
                                      metadata_operation_failed
                                       abort_transaction
                                        dm_pool_abort_metadata
                                         __open_or_format_metadata
                                           ↓
                                          dm_sm_disk_open
                                            ↓
                                           // open failed
                                           // pmd->data_sm is NULL
    dm_sm_dec_blocks
      ↓
     // try to access pmd->data_sm --> UAF

As shown above, if dm_pool_commit_metadata() and
dm_pool_abort_metadata() fail in pool_message process, kworker may
trigger UAF.

Fixes: be500ed7 ("dm space maps: improve performance with inc/dec on ranges of blocks")
Cc: stable@vger.kernel.org
Signed-off-by: default avatarLi Lingfeng <lilingfeng3@huawei.com>
Signed-off-by: default avatarMike Snitzer <snitzer@kernel.org>
      cb65b282
    • Li Lingfeng's avatar
      dm: don't lock fs when the map is NULL during suspend or resume · 2760904d
      Li Lingfeng authored 
      As described in commit 38d11da5 ("dm: don't lock fs when the map is
NULL in process of resume"), a deadlock may be triggered between
do_resume() and do_mount().

This commit preserves the fix from commit 38d11da5 but moves it to
where it also serves to fix a similar deadlock between do_suspend()
and do_mount().  It does so, if the active map is NULL, by clearing
DM_SUSPEND_LOCKFS_FLAG in dm_suspend() which is called by both
do_suspend() and do_resume().

Fixes: 38d11da5 ("dm: don't lock fs when the map is NULL in process of resume")
Signed-off-by: default avatarLi Lingfeng <lilingfeng3@huawei.com>
Signed-off-by: default avatarMike Snitzer <snitzer@kernel.org>
      2760904d
  3. 14 May, 2023 13 commits
  5. 13 May, 2023 17 commits
  7. 12 May, 2023 8 commits
    • Borislav Petkov (AMD)'s avatar
      x86/retbleed: Fix return thunk alignment · 9a48d604
      Borislav Petkov (AMD) authored 
      SYM_FUNC_START_LOCAL_NOALIGN() adds an endbr leading to this layout
(leaving only the last 2 bytes of the address):

  3bff <zen_untrain_ret>:
  3bff:       f3 0f 1e fa             endbr64
  3c03:       f6                      test   $0xcc,%bl

  3c04 <__x86_return_thunk>:
  3c04:       c3                      ret
  3c05:       cc                      int3
  3c06:       0f ae e8                lfence

However, "the RET at __x86_return_thunk must be on a 64 byte boundary,
for alignment within the BTB."

Use SYM_START instead.
Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9a48d604
    • Linus Torvalds's avatar
      Merge tag 'for-6.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux · 76c7f887
      Linus Torvalds authored 
      Pull more btrfs fixes from David Sterba:

 - fix incorrect number of bitmap entries for space cache if loading is
   interrupted by some error

 - fix backref walking, this breaks a mode of LOGICAL_INO_V2 ioctl that
   is used in deduplication tools

 - zoned mode fixes:
      - properly finish zone reserved for relocation
      - correctly calculate super block zone end on ZNS
      - properly initialize new extent buffer for redirty

 - make mount option clear_cache work with block-group-tree, to rebuild
   free-space-tree instead of temporarily disabling it that would lead
   to a forced read-only mount

 - fix alignment check for offset when printing extent item

* tag 'for-6.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: make clear_cache mount option to rebuild FST without disabling it
  btrfs: zero the buffer before marking it dirty in btrfs_redirty_list_add
  btrfs: zoned: fix full zone super block reading on ZNS
  btrfs: zoned: zone finish data relocation BG with last IO
  btrfs: fix backref walking not returning all inode refs
  btrfs: fix space cache inconsistency after error loading it from disk
  btrfs: print-tree: parent bytenr must be aligned to sector size
      76c7f887
    • Linus Torvalds's avatar
      Merge tag '6.4-rc1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6 · fd88f147
      Linus Torvalds authored 
      Pull cifs client fixes from Steve French:

 - fix for copy_file_range bug for very large files that are multiples
   of rsize

 - do not ignore "isolated transport" flag if set on share

 - set rasize default better

 - three fixes related to shutdown and freezing (fixes 4 xfstests, and
   closes deferred handles faster in some places that were missed)

* tag '6.4-rc1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: release leases for deferred close handles when freezing
  smb3: fix problem remounting a share after shutdown
  SMB3: force unmount was failing to close deferred close files
  smb3: improve parallel reads of large files
  do not reuse connection if share marked as isolated
  cifs: fix pcchunk length type in smb2_copychunk_range
      fd88f147
    • Linus Torvalds's avatar
      Merge tag 'vfs/v6.4-rc1/pipe' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs · df8c2d13
      Linus Torvalds authored 
      Pull vfs fix from Christian Brauner:
 "During the pipe nonblock rework the check for both O_NONBLOCK and
  IOCB_NOWAIT was dropped. Both checks need to be performed to ensure
  that files without O_NONBLOCK but IOCB_NOWAIT don't block when writing
  to or reading from a pipe.

  This just contains the fix adding the check for IOCB_NOWAIT back in"

* tag 'vfs/v6.4-rc1/pipe' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs:
  pipe: check for IOCB_NOWAIT alongside O_NONBLOCK
      df8c2d13
    • Linus Torvalds's avatar
      Merge tag 'io_uring-6.4-2023-05-12' of git://git.kernel.dk/linux · 584dc5db
      Linus Torvalds authored 
      Pull io_uring fix from Jens Axboe:
 "Just a single fix making io_uring_sqe_cmd() available regardless of
  CONFIG_IO_URING, fixing a regression introduced during the merge
  window if nvme was selected but io_uring was not"

* tag 'io_uring-6.4-2023-05-12' of git://git.kernel.dk/linux:
  io_uring: make io_uring_sqe_cmd() unconditionally available
      584dc5db
    • Linus Torvalds's avatar
      Merge tag 'riscv-for-linus-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux · ed6a75e3
      Linus Torvalds authored 
      Pull RISC-V fix from Palmer Dabbelt:
 "Just a single fix this week for a build issue. That'd usually be a
  good sign, but we've started to get some reports of boot failures on
  some hardware/bootloader configurations. Nothing concrete yet, but
  I've got a funny feeling that's where much of the bug hunting is going
  right now.

  Nothing's reproducing on my end, though, and this fixes some pretty
  concrete issues so I figured there's no reason to delay it:

   - a fix to the linker script to avoid orpahaned sections in
     kernel/pi"

* tag 'riscv-for-linus-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Fix orphan section warnings caused by kernel/pi
      ed6a75e3
    • Randy Dunlap's avatar
      Documentation/block: drop the request.rst file · 56cdea92
      Randy Dunlap authored 
      Documentation/block/request.rst is outdated and should be removed.
Also delete its entry in the block/index.rst file.
Signed-off-by: default avatarRandy Dunlap <rdunlap@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Link: https://lore.kernel.org/r/20230507182606.12647-1-rdunlap@infradead.orgSigned-off-by: default avatarJens Axboe <axboe@kernel.dk>
      56cdea92
    • Jens Axboe's avatar
      pipe: check for IOCB_NOWAIT alongside O_NONBLOCK · c04fe8e3
      Jens Axboe authored 
      Pipe reads or writes need to enable nonblocking attempts, if either
O_NONBLOCK is set on the file, or IOCB_NOWAIT is set in the iocb being
passed in. The latter isn't currently true, ensure we check for both
before waiting on data or space.

Fixes: afed6271 ("pipe: set FMODE_NOWAIT on pipes")
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Message-Id: <e5946d67-4e5e-b056-ba80-656bab12d9f6@kernel.dk>
Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
      c04fe8e3
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