1. 27 Oct, 2017 5 commits
  2. 26 Oct, 2017 9 commits
  3. 25 Oct, 2017 5 commits
    • Michael J. Ruhl's avatar
      RDMA/netlink: OOPs in rdma_nl_rcv_msg() from misinterpreted flag · b4d91aeb
      Michael J. Ruhl authored
      rdma_nl_rcv_msg() checks to see if it should use the .dump() callback
      or the .doit() callback.  The check is done with this check:
      
      if (flags & NLM_F_DUMP) ...
      
      The NLM_F_DUMP flag is two bits (NLM_F_ROOT | NLM_F_MATCH).
      
      When an RDMA_NL_LS message (response) is received, the bit used for
      indicating an error is the same bit as NLM_F_ROOT.
      
      NLM_F_ROOT == (0x100) == RDMA_NL_LS_F_ERR.
      
      ibacm sends a response with the RDMA_NL_LS_F_ERR bit set if an error
      occurs in the service.  The current code then misinterprets the
      NLM_F_DUMP bit and trys to call the .dump() callback.
      
      If the .dump() callback for the specified request is not available
      (which is true for the RDMA_NL_LS messages) the following Oops occurs:
      
      [ 4555.960256] BUG: unable to handle kernel NULL pointer dereference at
         (null)
      [ 4555.969046] IP:           (null)
      [ 4555.972664] PGD 10543f1067 P4D 10543f1067 PUD 1033f93067 PMD 0
      [ 4555.979287] Oops: 0010 [#1] SMP
      [ 4555.982809] Modules linked in: rpcrdma ib_isert iscsi_target_mod
      target_core_mod ib_iser libiscsi scsi_transport_iscsi ib_ipoib rdma_ucm ib_ucm
      ib_uverbs ib_umad rdma_cm ib_cm iw_cm dm_mirror dm_region_hash dm_log dm_mod
      dax sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp kvm irqbypass
      crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel crypto_simd
      glue_helper cryptd hfi1 rdmavt iTCO_wdt iTCO_vendor_support ib_core mei_me
      lpc_ich pcspkr mei ioatdma sg shpchp i2c_i801 mfd_core wmi ipmi_si ipmi_devintf
      ipmi_msghandler acpi_power_meter acpi_pad nfsd auth_rpcgss nfs_acl lockd grace
      sunrpc ip_tables ext4 mbcache jbd2 sd_mod mgag200 drm_kms_helper syscopyarea
      sysfillrect sysimgblt fb_sys_fops ttm igb ahci crc32c_intel ptp libahci
      pps_core drm dca libata i2c_algo_bit i2c_core
      [ 4556.061190] CPU: 54 PID: 9841 Comm: ibacm Tainted: G          I
      4.14.0-rc2+ #6
      [ 4556.069667] Hardware name: Intel Corporation S2600WT2/S2600WT2, BIOS
      SE5C610.86B.01.01.0008.021120151325 02/11/2015
      [ 4556.081339] task: ffff880855f42d00 task.stack: ffffc900246b4000
      [ 4556.087967] RIP: 0010:          (null)
      [ 4556.092166] RSP: 0018:ffffc900246b7bc8 EFLAGS: 00010246
      [ 4556.098018] RAX: ffffffff81dbe9e0 RBX: ffff881058bb1000 RCX:
      0000000000000000
      [ 4556.105997] RDX: 0000000000001100 RSI: ffff881058bb1320 RDI:
      ffff881056362000
      [ 4556.113984] RBP: ffffc900246b7bf8 R08: 0000000000000ec0 R09:
      0000000000001100
      [ 4556.121971] R10: ffff8810573a5000 R11: 0000000000000000 R12:
      ffff881056362000
      [ 4556.129957] R13: 0000000000000ec0 R14: ffff881058bb1320 R15:
      0000000000000ec0
      [ 4556.137945] FS:  00007fe0ba5a38c0(0000) GS:ffff88105f080000(0000)
      knlGS:0000000000000000
      [ 4556.147000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [ 4556.153433] CR2: 0000000000000000 CR3: 0000001056f5d003 CR4:
      00000000001606e0
      [ 4556.161419] Call Trace:
      [ 4556.164167]  ? netlink_dump+0x12c/0x290
      [ 4556.168468]  __netlink_dump_start+0x186/0x1f0
      [ 4556.173357]  rdma_nl_rcv_msg+0x193/0x1b0 [ib_core]
      [ 4556.178724]  rdma_nl_rcv+0xdc/0x130 [ib_core]
      [ 4556.183604]  netlink_unicast+0x181/0x240
      [ 4556.187998]  netlink_sendmsg+0x2c2/0x3b0
      [ 4556.192392]  sock_sendmsg+0x38/0x50
      [ 4556.196299]  SYSC_sendto+0x102/0x190
      [ 4556.200308]  ? __audit_syscall_entry+0xaf/0x100
      [ 4556.205387]  ? syscall_trace_enter+0x1d0/0x2b0
      [ 4556.210366]  ? __audit_syscall_exit+0x209/0x290
      [ 4556.215442]  SyS_sendto+0xe/0x10
      [ 4556.219060]  do_syscall_64+0x67/0x1b0
      [ 4556.223165]  entry_SYSCALL64_slow_path+0x25/0x25
      [ 4556.228328] RIP: 0033:0x7fe0b9db2a63
      [ 4556.232333] RSP: 002b:00007ffc55edc260 EFLAGS: 00000293 ORIG_RAX:
      000000000000002c
      [ 4556.240808] RAX: ffffffffffffffda RBX: 0000000000000010 RCX:
      00007fe0b9db2a63
      [ 4556.248796] RDX: 0000000000000010 RSI: 00007ffc55edc280 RDI:
      000000000000000d
      [ 4556.256782] RBP: 00007ffc55edc670 R08: 00007ffc55edc270 R09:
      000000000000000c
      [ 4556.265321] R10: 0000000000000000 R11: 0000000000000293 R12:
      00007ffc55edc280
      [ 4556.273846] R13: 000000000260b400 R14: 000000000000000d R15:
      0000000000000001
      [ 4556.282368] Code:  Bad RIP value.
      [ 4556.286629] RIP:           (null) RSP: ffffc900246b7bc8
      [ 4556.293013] CR2: 0000000000000000
      [ 4556.297292] ---[ end trace 8d67abcfd10ec209 ]---
      [ 4556.305465] Kernel panic - not syncing: Fatal exception
      [ 4556.313786] Kernel Offset: disabled
      [ 4556.321563] ---[ end Kernel panic - not syncing: Fatal exception
      [ 4556.328960] ------------[ cut here ]------------
      
      Special case RDMA_NL_LS response messages to call the appropriate
      callback.
      
      Additionally, make sure that the .dump() callback is not NULL
      before calling it.
      
      Fixes: 647c75ac
      
       ("RDMA/netlink: Convert LS to doit callback")
      Reviewed-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
      Reviewed-by: default avatarKaike Wan <kaike.wan@intel.com>
      Reviewed-by: default avatarAlex Estrin <alex.estrin@intel.com>
      Signed-off-by: default avatarMichael J. Ruhl <michael.j.ruhl@intel.com>
      Reviewed-by: default avatarShiraz Saleem <shiraz.saleem@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      b4d91aeb
    • Mark Brown's avatar
      Merge remote-tracking branches 'spi/fix/armada', 'spi/fix/idr',... · 7555aa76
      Mark Brown authored
      Merge remote-tracking branches 'spi/fix/armada', 'spi/fix/idr', 'spi/fix/qspi', 'spi/fix/stm32' and 'spi/fix/uapi' into spi-linus
      7555aa76
    • Jeff Layton's avatar
      ceph: unlock dangling spinlock in try_flush_caps() · 6c2838fb
      Jeff Layton authored
      
      
      sparse warns:
      
        fs/ceph/caps.c:2042:9: warning: context imbalance in 'try_flush_caps' - wrong count at exit
      
      We need to exit this function with the lock unlocked, but a couple of
      cases leave it locked.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
      Reviewed-by: default avatar"Yan, Zheng" <zyan@redhat.com>
      Reviewed-by: default avatarIlya Dryomov <idryomov@gmail.com>
      Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
      6c2838fb
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-4.14-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs · f3415787
      Linus Torvalds authored
      Pull NFS client bugfixes from Trond Myklebust:
      
       - Fix a list corruption in xprt_release()
      
       - Fix a workqueue lockdep warning due to unsafe use of
         cancel_work_sync()
      
      * tag 'nfs-for-4.14-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
        SUNRPC: Destroy transport from the system workqueue
        SUNRPC: fix a list corruption issue in xprt_release()
      f3415787
    • Josef Bacik's avatar
      nbd: handle interrupted sendmsg with a sndtimeo set · 32e67a3a
      Josef Bacik authored
      If you do not set sk_sndtimeo you will get -ERESTARTSYS if there is a
      pending signal when you enter sendmsg, which we handle properly.
      However if you set a timeout for your commands we'll set sk_sndtimeo to
      that timeout, which means that sendmsg will start returning -EINTR
      instead of -ERESTARTSYS.  Fix this by checking either cases and doing
      the correct thing.
      
      Cc: stable@vger.kernel.org
      Fixes: dc88e34d
      
       ("nbd: set sk->sk_sndtimeo for our sockets")
      Reported-and-tested-by: default avatarDaniel Xu <dlxu@fb.com>
      Signed-off-by: default avatarJosef Bacik <jbacik@fb.com>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      32e67a3a
  4. 24 Oct, 2017 5 commits
  5. 23 Oct, 2017 11 commits
  6. 22 Oct, 2017 5 commits