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  1. 05 8月, 2016 2 次提交
    • J
      writeback: Write dirty times for WB_SYNC_ALL writeback · dc5ff2b1
      由 Jan Kara 提交于 
      Currently we take care to handle I_DIRTY_TIME in vfs_fsync() and
queue_io() so that inodes which have only dirty timestamps are properly
written on fsync(2) and sync(2). However there are other call sites -
most notably going through write_inode_now() - which expect inode to be
clean after WB_SYNC_ALL writeback. This is not currently true as we do
not clear I_DIRTY_TIME in __writeback_single_inode() even for
WB_SYNC_ALL writeback in all the cases. This then resulted in the
following oops because bdev_write_inode() did not clean the inode and
writeback code later stumbled over a dirty inode with detached wb.

  general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN
  Modules linked in:
  CPU: 3 PID: 32 Comm: kworker/u10:1 Not tainted 4.6.0-rc3+ #349
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
  Workqueue: writeback wb_workfn (flush-11:0)
  task: ffff88006ccf1840 ti: ffff88006cda8000 task.ti: ffff88006cda8000
  RIP: 0010:[<ffffffff818884d2>]  [<ffffffff818884d2>]
  locked_inode_to_wb_and_lock_list+0xa2/0x750
  RSP: 0018:ffff88006cdaf7d0  EFLAGS: 00010246
  RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88006ccf2050
  RDX: 0000000000000000 RSI: 000000114c8a8484 RDI: 0000000000000286
  RBP: ffff88006cdaf820 R08: ffff88006ccf1840 R09: 0000000000000000
  R10: 000229915090805f R11: 0000000000000001 R12: ffff88006a72f5e0
  R13: dffffc0000000000 R14: ffffed000d4e5eed R15: ffffffff8830cf40
  FS:  0000000000000000(0000) GS:ffff88006d500000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000000003301bf8 CR3: 000000006368f000 CR4: 00000000000006e0
  DR0: 0000000000001ec9 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
  Stack:
   ffff88006a72f680 ffff88006a72f768 ffff8800671230d8 03ff88006cdaf948
   ffff88006a72f668 ffff88006a72f5e0 ffff8800671230d8 ffff88006cdaf948
   ffff880065b90cc8 ffff880067123100 ffff88006cdaf970 ffffffff8188e12e
  Call Trace:
   [<     inline     >] inode_to_wb_and_lock_list fs/fs-writeback.c:309
   [<ffffffff8188e12e>] writeback_sb_inodes+0x4de/0x1250 fs/fs-writeback.c:1554
   [<ffffffff8188efa4>] __writeback_inodes_wb+0x104/0x1e0 fs/fs-writeback.c:1600
   [<ffffffff8188f9ae>] wb_writeback+0x7ce/0xc90 fs/fs-writeback.c:1709
   [<     inline     >] wb_do_writeback fs/fs-writeback.c:1844
   [<ffffffff81891079>] wb_workfn+0x2f9/0x1000 fs/fs-writeback.c:1884
   [<ffffffff813bcd1e>] process_one_work+0x78e/0x15c0 kernel/workqueue.c:2094
   [<ffffffff813bdc2b>] worker_thread+0xdb/0xfc0 kernel/workqueue.c:2228
   [<ffffffff813cdeef>] kthread+0x23f/0x2d0 drivers/block/aoe/aoecmd.c:1303
   [<ffffffff867bc5d2>] ret_from_fork+0x22/0x50 arch/x86/entry/entry_64.S:392
  Code: 05 94 4a a8 06 85 c0 0f 85 03 03 00 00 e8 07 15 d0 ff 41 80 3e
  00 0f 85 64 06 00 00 49 8b 9c 24 88 01 00 00 48 89 d8 48 c1 e8 03 <42>
  80 3c 28 00 0f 85 17 06 00 00 48 8b 03 48 83 c0 50 48 39 c3
  RIP  [<     inline     >] wb_get include/linux/backing-dev-defs.h:212
  RIP  [<ffffffff818884d2>] locked_inode_to_wb_and_lock_list+0xa2/0x750
  fs/fs-writeback.c:281
   RSP <ffff88006cdaf7d0>
  ---[ end trace 986a4d314dcb2694 ]---

Fix the problem by making sure __writeback_single_inode() writes inode
only with dirty times in WB_SYNC_ALL mode.
Reported-by: NDmitry Vyukov <dvyukov@google.com>
Tested-by: NLaurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: NJan Kara <jack@suse.cz>
Signed-off-by: NJens Axboe <axboe@fb.com>
      dc5ff2b1
    • J
      floppy: fix open(O_ACCMODE) for ioctl-only open · ff06db1e
      由 Jiri Kosina 提交于 
      Commit 09954bad ("floppy: refactor open() flags handling"), as a
side-effect, causes open(/dev/fdX, O_ACCMODE) to fail. It turns out that
this is being used setfdprm userspace for ioctl-only open().

Reintroduce back the original behavior wrt !(FMODE_READ|FMODE_WRITE)
modes, while still keeping the original O_NDELAY bug fixed.

Cc: stable@vger.kernel.org # v4.5+
Reported-by: NWim Osterholt <wim@djo.tudelft.nl>
Tested-by: NWim Osterholt <wim@djo.tudelft.nl>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>
Signed-off-by: NJens Axboe <axboe@fb.com>
      ff06db1e
  3. 04 8月, 2016 32 次提交
  5. 03 8月, 2016 6 次提交
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · f0936155
      由 Linus Torvalds 提交于 
      Pull networking fixes from David Miller:

 1) Fix several cases of missing of_node_put() calls in various
    networking drivers.  From Peter Chen.

 2) Don't try to remove unconfigured VLANs in qed driver, from Yuval
    Mintz.

 3) Unbalanced locking in TIPC error handling, from Wei Yongjun.

 4) Fix lockups in CPDMA driver, from Grygorii Strashko.

 5) More MACSEC refcount et al fixes, from Sabrina Dubroca.

 6) Fix MAC address setting in r8169 during runtime suspend, from
    Chun-Hao Lin.

 7) Various printf format specifier fixes, from Heinrich Schuchardt.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (59 commits)
  qed: Fail driver load in 100g MSI mode.
  ethernet: ti: davinci_emac: add missing of_node_put after calling of_parse_phandle
  ethernet: stmicro: stmmac: add missing of_node_put after calling of_parse_phandle
  ethernet: stmicro: stmmac: dwmac-socfpga: add missing of_node_put after calling of_parse_phandle
  ethernet: renesas: sh_eth: add missing of_node_put after calling of_parse_phandle
  ethernet: renesas: ravb_main: add missing of_node_put after calling of_parse_phandle
  ethernet: marvell: pxa168_eth: add missing of_node_put after calling of_parse_phandle
  ethernet: marvell: mvpp2: add missing of_node_put after calling of_parse_phandle
  ethernet: marvell: mvneta: add missing of_node_put after calling of_parse_phandle
  ethernet: hisilicon: hns: hns_dsaf_main: add missing of_node_put after calling of_parse_phandle
  ethernet: hisilicon: hns: hns_dsaf_mac: add missing of_node_put after calling of_parse_phandle
  ethernet: cavium: octeon: add missing of_node_put after calling of_parse_phandle
  ethernet: aurora: nb8800: add missing of_node_put after calling of_parse_phandle
  ethernet: arc: emac_main: add missing of_node_put after calling of_parse_phandle
  ethernet: apm: xgene: add missing of_node_put after calling of_parse_phandle
  ethernet: altera: add missing of_node_put
  8139too: fix system hang when there is a tx timeout event.
  qed: Fix error return code in qed_resc_alloc()
  net: qlcnic: avoid superfluous assignement
  dsa: b53: remove redundant if
  ...
      f0936155
    • L
      Merge branch 'akpm' (patches from Andrew) · d52bd54d
      由 Linus Torvalds 提交于 
      Merge yet more updates from Andrew Morton:

 - the rest of ocfs2

 - various hotfixes, mainly MM

 - quite a bit of misc stuff - drivers, fork, exec, signals, etc.

 - printk updates

 - firmware

 - checkpatch

 - nilfs2

 - more kexec stuff than usual

 - rapidio updates

 - w1 things

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (111 commits)
  ipc: delete "nr_ipc_ns"
  kcov: allow more fine-grained coverage instrumentation
  init/Kconfig: add clarification for out-of-tree modules
  config: add android config fragments
  init/Kconfig: ban CONFIG_LOCALVERSION_AUTO with allmodconfig
  relay: add global mode support for buffer-only channels
  init: allow blacklisting of module_init functions
  w1:omap_hdq: fix regression
  w1: add helper macro module_w1_family
  w1: remove need for ida and use PLATFORM_DEVID_AUTO
  rapidio/switches: add driver for IDT gen3 switches
  powerpc/fsl_rio: apply changes for RIO spec rev 3
  rapidio: modify for rev.3 specification changes
  rapidio: change inbound window size type to u64
  rapidio/idt_gen2: fix locking warning
  rapidio: fix error handling in mbox request/release functions
  rapidio/tsi721_dma: advance queue processing from transfer submit call
  rapidio/tsi721: add messaging mbox selector parameter
  rapidio/tsi721: add PCIe MRRS override parameter
  rapidio/tsi721_dma: add channel mask and queue size parameters
  ...
      d52bd54d
    • L
      Merge tag 'for-linus-v4.8' of git://github.com/martinbrandenburg/linux · 8cbdd85b
      由 Linus Torvalds 提交于 
      Pull orangefs update from Martin Brandenburg:
 "Kernel side caching and executable bugfix

  This allows OrangeFS to utilize the dcache and adds an in kernel
  attribute cache.  We previously used the user side client for this
  purpose.

  We see a modest performance increase on small file operations.  For
  example, without the cache, compiling coreutils takes about 17
  minutes.  With the patch and a 50 millisecond timeout for
  dcache_timeout_msecs and getattr_timeout_msecs (the default),
  compiling coreutils takes about 6 minutes 20 seconds.  On the same
  hardware, compiling coreutils on an xfs filesystem takes 90 seconds.
  We see similar improvements with mdtest and a test involving writing,
  reading, and deleting a large number of small files.

  Interested parties can review more data at the following URL.

    https://docs.google.com/spreadsheets/d/1v4aUeppKexIbRMz_Yn9k4eaM3uy2KCaPoe_93YKWOtA/pubhtml

  The eventual goal of this is to allow getdents to turn into a
  readdirplus to the OrangeFS server.  The cache will be filled then,
  which should provide a performance benefit to the common case of
  readdir followed by getattr on each entry (i.e.  ls -l).

  This also fixes a bug.  When orangefs_inode_permission was added, it
  did not collect i_size from the OrangeFS server, since this presses an
  unnecessary load on the OrangeFS server.  However, it left a case
  where i_size is never initialized.  Then running an executable could
  fail.

  With this patch, size is always collected to be inserted into the
  cache.  Thus the bug disappears.  If this patch is not accepted during
  this merge window, we will send a one-line band-aid for this bug
  instead"

* tag 'for-linus-v4.8' of git://github.com/martinbrandenburg/linux:
  Orangefs: update orangefs.txt
  orangefs: Account for jiffies wraparound.
  orangefs: Change default dcache and getattr timeout to 50 msec.
  orangefs: Allow dcache and getattr cache time to be configured.
  orangefs: Cache getattr results.
  orangefs: Use d_time to avoid excessive lookups
      8cbdd85b
    • L
      Merge tag 'ceph-for-4.8-rc1' of git://github.com/ceph/ceph-client · 72b5ac54
      由 Linus Torvalds 提交于 
      Pull Ceph updates from Ilya Dryomov:
 "The highlights are:

   - RADOS namespace support in libceph and CephFS (Zheng Yan and
     myself).  The stopgaps added in 4.5 to deny access to inodes in
     namespaces are removed and CEPH_FEATURE_FS_FILE_LAYOUT_V2 feature
     bit is now fully supported

   - A large rework of the MDS cap flushing code (Zheng Yan)

   - Handle some of ->d_revalidate() in RCU mode (Jeff Layton).  We were
     overly pessimistic before, bailing at the first sight of LOOKUP_RCU

  On top of that we've got a few CephFS bug fixes, a couple of cleanups
  and Arnd's workaround for a weird genksyms issue"

* tag 'ceph-for-4.8-rc1' of git://github.com/ceph/ceph-client: (34 commits)
  ceph: fix symbol versioning for ceph_monc_do_statfs
  ceph: Correctly return NXIO errors from ceph_llseek
  ceph: Mark the file cache as unreclaimable
  ceph: optimize cap flush waiting
  ceph: cleanup ceph_flush_snaps()
  ceph: kick cap flushes before sending other cap message
  ceph: introduce an inode flag to indicates if snapflush is needed
  ceph: avoid sending duplicated cap flush message
  ceph: unify cap flush and snapcap flush
  ceph: use list instead of rbtree to track cap flushes
  ceph: update types of some local varibles
  ceph: include 'follows' of pending snapflush in cap reconnect message
  ceph: update cap reconnect message to version 3
  ceph: mount non-default filesystem by name
  libceph: fsmap.user subscription support
  ceph: handle LOOKUP_RCU in ceph_d_revalidate
  ceph: allow dentry_lease_is_valid to work under RCU walk
  ceph: clear d_fsinfo pointer under d_lock
  ceph: remove ceph_mdsc_lease_release
  ceph: don't use ->d_time
  ...
      72b5ac54
    • A
      ipc: delete "nr_ipc_ns" · 3bd080e4
      由 Alexey Dobriyan 提交于 
      Write-only variable.

Link: http://lkml.kernel.org/r/20160708214356.GA6785@p183.telecom.bySigned-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      3bd080e4
    • V
      kcov: allow more fine-grained coverage instrumentation · a4691dea
      由 Vegard Nossum 提交于 
      For more targeted fuzzing, it's better to disable kernel-wide
instrumentation and instead enable it on a per-subsystem basis.  This
follows the pattern of UBSAN and allows you to compile in the kcov
driver without instrumenting the whole kernel.

To instrument a part of the kernel, you can use either

    # for a single file in the current directory
    KCOV_INSTRUMENT_filename.o := y

or

    # for all the files in the current directory (excluding subdirectories)
    KCOV_INSTRUMENT := y

or

    # (same as above)
    ccflags-y += $(CFLAGS_KCOV)

or

    # for all the files in the current directory (including subdirectories)
    subdir-ccflags-y += $(CFLAGS_KCOV)

Link: http://lkml.kernel.org/r/1464008380-11405-1-git-send-email-vegard.nossum@oracle.comSigned-off-by: NVegard Nossum <vegard.nossum@oracle.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      a4691dea