1. 20 8月, 2010 27 次提交
  2. 19 8月, 2010 12 次提交
  3. 18 8月, 2010 1 次提交
    • T
      NFS: Fix an Oops in the NFSv4 atomic open code · 0a377cff
      Trond Myklebust 提交于
      Adam Lackorzynski reports:
      
      with 2.6.35.2 I'm getting this reproducible Oops:
      
      [  110.825396] BUG: unable to handle kernel NULL pointer dereference at
      (null)
      [  110.828638] IP: [<ffffffff811247b7>] encode_attrs+0x1a/0x2a4
      [  110.828638] PGD be89f067 PUD bf18f067 PMD 0
      [  110.828638] Oops: 0000 [#1] SMP
      [  110.828638] last sysfs file: /sys/class/net/lo/operstate
      [  110.828638] CPU 2
      [  110.828638] Modules linked in: rtc_cmos rtc_core rtc_lib amd64_edac_mod
      i2c_amd756 edac_core i2c_core dm_mirror dm_region_hash dm_log dm_snapshot
      sg sr_mod usb_storage ohci_hcd mptspi tg3 mptscsih mptbase usbcore nls_base
      [last unloaded: scsi_wait_scan]
      [  110.828638]
      [  110.828638] Pid: 11264, comm: setchecksum Not tainted 2.6.35.2 #1
      [  110.828638] RIP: 0010:[<ffffffff811247b7>]  [<ffffffff811247b7>]
      encode_attrs+0x1a/0x2a4
      [  110.828638] RSP: 0000:ffff88003bf5b878  EFLAGS: 00010296
      [  110.828638] RAX: ffff8800bddb48a8 RBX: ffff88003bf5bb18 RCX:
      0000000000000000
      [  110.828638] RDX: ffff8800be258800 RSI: 0000000000000000 RDI:
      ffff88003bf5b9f8
      [  110.828638] RBP: 0000000000000000 R08: ffff8800bddb48a8 R09:
      0000000000000004
      [  110.828638] R10: 0000000000000003 R11: ffff8800be779000 R12:
      ffff8800be258800
      [  110.828638] R13: ffff88003bf5b9f8 R14: ffff88003bf5bb20 R15:
      ffff8800be258800
      [  110.828638] FS:  0000000000000000(0000) GS:ffff880041e00000(0063)
      knlGS:00000000556bd6b0
      [  110.828638] CS:  0010 DS: 002b ES: 002b CR0: 000000008005003b
      [  110.828638] CR2: 0000000000000000 CR3: 00000000be8ef000 CR4:
      00000000000006e0
      [  110.828638] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
      0000000000000000
      [  110.828638] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
      0000000000000400
      [  110.828638] Process setchecksum (pid: 11264, threadinfo
      ffff88003bf5a000, task ffff88003f232210)
      [  110.828638] Stack:
      [  110.828638]  0000000000000000 ffff8800bfbcf920 0000000000000000
      0000000000000ffe
      [  110.828638] <0> 0000000000000000 0000000000000000 0000000000000000
      0000000000000000
      [  110.828638] <0> 0000000000000000 0000000000000000 0000000000000000
      0000000000000000
      [  110.828638] Call Trace:
      [  110.828638]  [<ffffffff81124c1f>] ? nfs4_xdr_enc_setattr+0x90/0xb4
      [  110.828638]  [<ffffffff81371161>] ? call_transmit+0x1c3/0x24a
      [  110.828638]  [<ffffffff813774d9>] ? __rpc_execute+0x78/0x22a
      [  110.828638]  [<ffffffff81371a91>] ? rpc_run_task+0x21/0x2b
      [  110.828638]  [<ffffffff81371b7e>] ? rpc_call_sync+0x3d/0x5d
      [  110.828638]  [<ffffffff8111e284>] ? _nfs4_do_setattr+0x11b/0x147
      [  110.828638]  [<ffffffff81109466>] ? nfs_init_locked+0x0/0x32
      [  110.828638]  [<ffffffff810ac521>] ? ifind+0x4e/0x90
      [  110.828638]  [<ffffffff8111e2fb>] ? nfs4_do_setattr+0x4b/0x6e
      [  110.828638]  [<ffffffff8111e634>] ? nfs4_do_open+0x291/0x3a6
      [  110.828638]  [<ffffffff8111ed81>] ? nfs4_open_revalidate+0x63/0x14a
      [  110.828638]  [<ffffffff811056c4>] ? nfs_open_revalidate+0xd7/0x161
      [  110.828638]  [<ffffffff810a2de4>] ? do_lookup+0x1a4/0x201
      [  110.828638]  [<ffffffff810a4733>] ? link_path_walk+0x6a/0x9d5
      [  110.828638]  [<ffffffff810a42b6>] ? do_last+0x17b/0x58e
      [  110.828638]  [<ffffffff810a5fbe>] ? do_filp_open+0x1bd/0x56e
      [  110.828638]  [<ffffffff811cd5e0>] ? _atomic_dec_and_lock+0x30/0x48
      [  110.828638]  [<ffffffff810a9b1b>] ? dput+0x37/0x152
      [  110.828638]  [<ffffffff810ae063>] ? alloc_fd+0x69/0x10a
      [  110.828638]  [<ffffffff81099f39>] ? do_sys_open+0x56/0x100
      [  110.828638]  [<ffffffff81027a22>] ? ia32_sysret+0x0/0x5
      [  110.828638] Code: 83 f1 01 e8 f5 ca ff ff 48 83 c4 50 5b 5d 41 5c c3 41
      57 41 56 41 55 49 89 fd 41 54 49 89 d4 55 48 89 f5 53 48 81 ec 18 01 00 00
      <8b> 06 89 c2 83 e2 08 83 fa 01 19 db 83 e3 f8 83 c3 18 a8 01 8d
      [  110.828638] RIP  [<ffffffff811247b7>] encode_attrs+0x1a/0x2a4
      [  110.828638]  RSP <ffff88003bf5b878>
      [  110.828638] CR2: 0000000000000000
      [  112.840396] ---[ end trace 95282e83fd77358f ]---
      
      We need to ensure that the O_EXCL flag is turned off if the user doesn't
      set O_CREAT.
      
      Cc: stable@kernel.org
      Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      0a377cff