[LU-7934] overflow for tr->otr_next_id

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.11.0
• Affects Version/s: Lustre 2.8.0
• Labels: bgti patch
• Severity: 3
• Assignee: WC Triage
• Reporter: Alexander Boyko

Description

crash> bt
PID: 231396  TASK: ffff880b73c5d540  CPU: 4   COMMAND: "mdt01_088"
 #0 [ffff880d7e5057e8] machine_kexec at ffffffff81038f3b
 #1 [ffff880d7e505848] crash_kexec at ffffffff810c5b02
 #2 [ffff880d7e505918] panic at ffffffff81524e75
 #3 [ffff880d7e505998] lbug_with_loc at ffffffffa04feeeb [libcfs]
 #4 [ffff880d7e5059b8] osp_sync_add_rec at ffffffffa10708eb [osp]
 #5 [ffff880d7e505a28] osp_sync_add at ffffffffa1070b07 [osp]
 #6 [ffff880d7e505a48] osp_object_destroy at ffffffffa1062346 [osp]
 #7 [ffff880d7e505a88] lod_object_destroy at ffffffffa1020b07 [lod]
 #8 [ffff880d7e505ac8] mdd_finish_unlink at ffffffffa0dc7538 [mdd]
 #9 [ffff880d7e505b38] mdd_unlink at ffffffffa0dc814a [mdd]
#10 [ffff880d7e505bf8] mdo_unlink at ffffffffa0e36458 [mdt]
#11 [ffff880d7e505c08] mdt_reint_unlink at ffffffffa0e3a24b [mdt]
#12 [ffff880d7e505c98] mdt_reint_rec at ffffffffa0e364ed [mdt]
#13 [ffff880d7e505cc8] mdt_reint_internal at ffffffffa0e1ca0b [mdt]
#14 [ffff880d7e505d08] mdt_reint at ffffffffa0e1d13b [mdt]
#15 [ffff880d7e505d48] tgt_request_handle at ffffffffa092287e [ptlrpc]
#16 [ffff880d7e505da8] ptlrpc_main at ffffffffa08d24d1 [ptlrpc]
#17 [ffff880d7e505ee8] kthread at ffffffff8109ac66
#18 [ffff880d7e505f48] kernel_thread at ffffffff8100c20a

Crash was happened due

<3>[11441257.937330] LustreError: 185667:0:(osp_sync.c:1544:osp_sync_id_get()) snx11126-OST0045-osc-MDT0000: next 0, last synced 4294967205
<0>[11441257.940592] LustreError: 231396:0:(osp_sync.c:1545:osp_sync_id_get()) LBUG

The root cause is u32 overflow for tr->otr_next_id.

Issue Links

• is duplicated by: LU-9626 LustreError: 16331:0:(osp_sync.c:1677:osp_sync_id_get()) LBUG