[LU-1531] Accessing .lustre/fid/[0x1:0x0:0x0] triggers LBUG in osd_compat_objid_lookup()

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.4.0
• Affects Version/s: Lustre 2.3.0
• Environment: # uname -r; 2.6.32-220.13.1.el6.l22.x86_64; # cat /proc/fs/lustre/version ; lustre: 2.2.55; kernel: patchless_client; build: 2.2.55--CHANGED-2.6.32-220.13.1.el6.l22.x86_64
• Severity: 3
• Assignee: Richard Henwood (Inactive)
• Reporter: John Hammond

Description

[sanity@r62-lustre lustre]$ cat .lustre/fid/[0x1:0x0:0x0]

LustreError: 2316:0:(osd_compat.c:383:osd_compat_objid_lookup()) ASSERTION( map ) failed:
LustreError: 2316:0:(osd_compat.c:383:osd_compat_objid_lookup()) LBUG
Pid: 2316, comm: mdt_00

Call Trace:
[<ffffffffa02c2905>] libcfs_debug_dumpstack+0x55/0x80 [libcfs]
[<ffffffffa02c2f17>] lbug_with_loc+0x47/0xb0 [libcfs]
[<ffffffffa0b7f889>] osd_compat_objid_lookup+0x479/0x520 [osd_ldiskfs]
[<ffffffffa0b74165>] osd_oi_lookup+0x55/0xb0 [osd_ldiskfs]
[<ffffffffa0b6ea90>] osd_object_init+0x260/0x6a0 [osd_ldiskfs]
[<ffffffffa048ab0c>] ? lu_object_add+0x2c/0x30 [obdclass]
[<ffffffffa048c5d5>] lu_object_alloc+0xd5/0x310 [obdclass]
[<ffffffffa048cba8>] ? htable_lookup+0x108/0x1c0 [obdclass]
[<ffffffffa048ce61>] lu_object_find_at+0x201/0x450 [obdclass]
[<ffffffff81273c47>] ? vsscanf+0x617/0x7c0
[<ffffffffa048d0ef>] lu_object_find_slice+0x1f/0x80 [obdclass]
[<ffffffffa0a4f160>] mdd_object_find+0x10/0x70 [mdd]
[<ffffffffa0a79006>] obf_lookup+0xd6/0x270 [mdd]
[<ffffffffa0b3f136>] cml_lookup+0x66/0x1b0 [cmm]
[<ffffffffa0ad50e7>] ? mdt_version_get_check+0x47/0xe0 [mdt]
[<ffffffffa0ae9c37>] mdt_reint_open+0x6f7/0x18b0 [mdt]
[<ffffffffa0a7782e>] ? md_ucred+0x1e/0x60 [mdd]
[<ffffffffa0ab81a5>] ? mdt_ucred+0x15/0x20 [mdt]
[<ffffffffa0acf21c>] ? mdt_root_squash+0x2c/0x3e0 [mdt]
[<ffffffffa0ad3b21>] mdt_reint_rec+0x41/0xe0 [mdt]
[<ffffffffa0acd37a>] mdt_reint_internal+0x50a/0x810 [mdt]
[<ffffffffa0acd94d>] mdt_intent_reint+0x1ed/0x500 [mdt]
[<ffffffffa0ac9c91>] mdt_intent_policy+0x371/0x6a0 [mdt]
[<ffffffffa05ae831>] ldlm_lock_enqueue+0x361/0x8f0 [ptlrpc]
[<ffffffffa05d611a>] ldlm_handle_enqueue0+0x48a/0xf40 [ptlrpc]
[<ffffffffa0ac9836>] mdt_enqueue+0x46/0x130 [mdt]
[<ffffffffa0abf2a2>] mdt_handle_common+0x922/0x1740 [mdt]
[<ffffffffa0ac0195>] mdt_regular_handle+0x15/0x20 [mdt]
[<ffffffffa0604782>] ptlrpc_server_handle_request+0x412/0xeb0 [ptlrpc]
[<ffffffffa02c365e>] ? cfs_timer_arm+0xe/0x10 [libcfs]
[<ffffffffa02d3d9f>] ? lc_watchdog_touch+0x6f/0x180 [libcfs]
[<ffffffffa05fd5e2>] ? ptlrpc_wait_event+0xb2/0x2c0 [ptlrpc]
[<ffffffff81051ab3>] ? __wake_up+0x53/0x70
[<ffffffffa06059f7>] ptlrpc_main+0x7d7/0x1610 [ptlrpc]
[<ffffffffa0605220>] ? ptlrpc_main+0x0/0x1610 [ptlrpc]
[<ffffffff8100c14a>] child_rip+0xa/0x20
[<ffffffffa0605220>] ? ptlrpc_main+0x0/0x1610 [ptlrpc]
[<ffffffffa0605220>] ? ptlrpc_main+0x0/0x1610 [ptlrpc]
[<ffffffff8100c140>] ? child_rip+0x0/0x20

LustreError: dumping log to /tmp/lustre-log.1339790039.2316

Issue Links

• is related to: LU-1518 Missing/bad operations in mdd_{obf,dot_lustre}_obj_op causing LBUGs