[LU-1405] Kernel panic when running sanityn test_12

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.3.0
• Severity: 3
• Assignee: WC Triage
• Reporter: Andriy Skulysh

Description

Lustre: DEBUG MARKER: only running test 12
Lustre: DEBUG MARKER: excepting tests: 22 14b 19 22 28 29 35
Lustre: DEBUG MARKER: == sanityn test 12: test lock ordering (link, stat, unlink) ============= 09:12:10 (1332227530)
Lustre: DEBUG MARKER: start dir: /mnt/lustre/lockdir=144115205255725117 file: /mnt/lustre/lockdir/lockfile=144115205255725115
LustreError: 2212:0:(osd_handler.c:2314:osd_object_ref_add()) ASSERTION(inode->i_nlink < LDISKFS_LINK_MAX) failed
LustreError: 2212:0:(osd_handler.c:2314:osd_object_ref_add()) LBUG
Pid: 2212, comm: mdt_00

Call Trace:
[<ffffffffa01f8855>] libcfs_debug_dumpstack+0x55/0x80 [libcfs]
[<ffffffffa01f8e95>] lbug_with_loc+0x75/0xe0 [libcfs]
[<ffffffffa0203db6>] libcfs_assertion_failed+0x66/0x70 [libcfs]
[<ffffffffa0797f6a>] osd_object_ref_add+0x13a/0x190 [osd_ldiskfs]
[<ffffffffa06d9ca5>] mdo_ref_add+0xb5/0xc0 [mdd]
[<ffffffffa06df326>] mdd_link+0xa06/0xf30 [mdd]
[<ffffffffa06ddf16>] ? mdd_lookup+0x56/0x120 [mdd]
[<ffffffffa077d056>] cml_link+0xb6/0x260 [cmm]
[<ffffffffa044e2f4>] ? lustre_msg_get_versions+0x94/0x100 [ptlrpc]
[<ffffffffa0729520>] mdt_reint_link+0x760/0xc10 [mdt]
[<ffffffffa07241af>] ? mdt_link_unpack+0x3ef/0x5f0 [mdt]
[<ffffffffa06e7d06>] ? md_ucred+0x26/0x60 [mdd]
[<ffffffffa0725a9f>] mdt_reint_rec+0x3f/0x100 [mdt]
[<ffffffffa044d544>] ? lustre_msg_get_flags+0x34/0xa0 [ptlrpc]
[<ffffffffa071dde4>] mdt_reint_internal+0x6d4/0x9f0 [mdt]
[<ffffffffa0713806>] ? mdt_reint_opcode+0x96/0x160 [mdt]
[<ffffffffa071e14c>] mdt_reint+0x4c/0x120 [mdt]
[<ffffffffa044d018>] ? lustre_msg_check_version+0xc8/0xe0 [ptlrpc]
[<ffffffffa0710ee5>] mdt_handle_common+0x8d5/0x1810 [mdt]
[<ffffffffa044aca4>] ? lustre_msg_get_opc+0x94/0x100 [ptlrpc]
[<ffffffffa0711ef5>] mdt_regular_handle+0x15/0x20 [mdt]
[<ffffffffa045a571>] ptlrpc_server_handle_request+0x3f1/0xed0 [ptlrpc]
[<ffffffffa0205843>] ? lc_watchdog_touch+0x73/0x140 [libcfs]
[<ffffffff8105e842>] ? default_wake_function+0x12/0x20
[<ffffffffa0453602>] ? ptlrpc_wait_event+0xb2/0x2c0 [ptlrpc]
[<ffffffff81051a03>] ? __wake_up+0x53/0x70
[<ffffffffa045b857>] ptlrpc_main+0x807/0x1800 [ptlrpc]
[<ffffffffa045b050>] ? ptlrpc_main+0x0/0x1800 [ptlrpc]
[<ffffffff8100c14a>] child_rip+0xa/0x20
[<ffffffffa045b050>] ? ptlrpc_main+0x0/0x1800 [ptlrpc]
[<ffffffffa045b050>] ? ptlrpc_main+0x0/0x1800 [ptlrpc]
[<ffffffff8100c140>] ? child_rip+0x0/0x20

Kernel panic - not syncing: LBUG
Pid: 2212, comm: mdt_00 Not tainted 2.6.32-220.4.2.el6_lustrexyratex #1
Call Trace:
[<ffffffff814ed144>] ? panic+0x78/0x143
[<ffffffffa01f8eeb>] ? lbug_with_loc+0xcb/0xe0 [libcfs]
[<ffffffffa0203db6>] ? libcfs_assertion_failed+0x66/0x70 [libcfs]
[<ffffffffa0797f6a>] ? osd_object_ref_add+0x13a/0x190 [osd_ldiskfs]
[<ffffffffa06d9ca5>] ? mdo_ref_add+0xb5/0xc0 [mdd]
[<ffffffffa06df326>] ? mdd_link+0xa06/0xf30 [mdd]
[<ffffffffa06ddf16>] ? mdd_lookup+0x56/0x120 [mdd]
[<ffffffffa077d056>] ? cml_link+0xb6/0x260 [cmm]
[<ffffffffa044e2f4>] ? lustre_msg_get_versions+0x94/0x100 [ptlrpc]
[<ffffffffa0729520>] ? mdt_reint_link+0x760/0xc10 [mdt]
[<ffffffffa07241af>] ? mdt_link_unpack+0x3ef/0x5f0 [mdt]
[<ffffffffa06e7d06>] ? md_ucred+0x26/0x60 [mdd]
[<ffffffffa0725a9f>] ? mdt_reint_rec+0x3f/0x100 [mdt]
[<ffffffffa044d544>] ? lustre_msg_get_flags+0x34/0xa0 [ptlrpc]
[<ffffffffa071dde4>] ? mdt_reint_internal+0x6d4/0x9f0 [mdt]
[<ffffffffa0713806>] ? mdt_reint_opcode+0x96/0x160 [mdt]
[<ffffffffa071e14c>] ? mdt_reint+0x4c/0x120 [mdt]
[<ffffffffa044d018>] ? lustre_msg_check_version+0xc8/0xe0 [ptlrpc]
[<ffffffffa0710ee5>] ? mdt_handle_common+0x8d5/0x1810 [mdt]
[<ffffffffa044aca4>] ? lustre_msg_get_opc+0x94/0x100 [ptlrpc]
[<ffffffffa0711ef5>] ? mdt_regular_handle+0x15/0x20 [mdt]
[<ffffffffa045a571>] ? ptlrpc_server_handle_request+0x3f1/0xed0 [ptlrpc]
[<ffffffffa0205843>] ? lc_watchdog_touch+0x73/0x140 [libcfs]
[<ffffffff8105e842>] ? default_wake_function+0x12/0x20
[<ffffffffa0453602>] ? ptlrpc_wait_event+0xb2/0x2c0 [ptlrpc]
[<ffffffff81051a03>] ? __wake_up+0x53/0x70
[<ffffffffa045b857>] ? ptlrpc_main+0x807/0x1800 [ptlrpc]
[<ffffffffa045b050>] ? ptlrpc_main+0x0/0x1800 [ptlrpc]
[<ffffffff8100c14a>] ? child_rip+0xa/0x20
[<ffffffffa045b050>] ? ptlrpc_main+0x0/0x1800 [ptlrpc]
[<ffffffffa045b050>] ? ptlrpc_main+0x0/0x1800 [ptlrpc]
[<ffffffff8100c140>] ? child_rip+0x0/0x20

Fix LASSERT changed in LU-993. i_nlink can be equal to ddp_max_nlink (LDISKFS_LINK_MAX) for regular files.