<0>[69304.921681] LustreError: 22001:0:(ldlm_lock.c:851:ldlm_lock_decref_internal_nolock()) ASSERTION( lock->l_readers > 0 ) failed: <0>[69304.959408] LustreError: 22001:0:(ldlm_lock.c:851:ldlm_lock_decref_internal_nolock()) LBUG <4>[69304.986557] Pid: 22001, comm: Attach API tear <4>[69304.986560] <4>[69304.986560] Call Trace: <4>[69304.986584] [] dump_trace+0x75/0x310 <4>[69304.986622] [] libcfs_debug_dumpstack+0x4a/0x70 [libcfs] <4>[69304.986670] [] lbug_with_loc+0x3e/0xb0 [libcfs] <4>[69304.986726] [] ldlm_lock_decref_internal_nolock+0x199/0x1a0 [ptlrpc] <4>[69304.986781] [] ldlm_process_flock_lock+0xc40/0x1360 [ptlrpc] <4>[69304.986848] [] ldlm_flock_completion_ast+0x406/0xad0 [ptlrpc] <4>[69304.986911] [] ldlm_cli_enqueue_fini+0x8a0/0xf20 [ptlrpc] <4>[69304.986969] [] ldlm_cli_enqueue+0x3b4/0x760 [ptlrpc] <4>[69304.987004] [] mdc_enqueue+0x32b/0xf20 [mdc] <4>[69304.987041] [] lmv_enqueue+0x28b/0x700 [lmv] <4>[69304.987093] [] ll_file_flock+0x551/0xa70 [lustre] <4>[69304.987115] [] do_lock_file_wait+0x58/0x100 <4>[69304.987124] [] fcntl_setlk+0x12a/0x210 <4>[69304.987133] [] do_fcntl+0x23a/0x430 <4>[69304.987141] [] sys_fcntl+0x66/0xc0 <4>[69304.987151] [] system_call_fastpath+0x16/0x1b <4>[69304.987192] [<00007ffff7bcf822>] 0x7ffff7bcf822 <4>[69304.987194] <0>[69304.987432] Kernel panic - not syncing: LBUG <4>[69305.001455] Pid: 22001, comm: Attach API tear Tainted: GF NX 3.0.93-0.8-default #1 <4>[69305.028891] Call Trace: <4>[69305.028901] [] dump_trace+0x75/0x310 <4>[69305.028912] [] dump_stack+0x69/0x6f <4>[69305.028918] [] panic+0x93/0x201 <4>[69305.028937] [] lbug_with_loc+0xa3/0xb0 [libcfs] <4>[69305.028984] [] ldlm_lock_decref_internal_nolock+0x199/0x1a0 [ptlrpc] <4>[69305.029037] [] ldlm_process_flock_lock+0xc40/0x1360 [ptlrpc] <4>[69305.029102] [] ldlm_flock_completion_ast+0x406/0xad0 [ptlrpc] <4>[69305.029165] [] ldlm_cli_enqueue_fini+0x8a0/0xf20 [ptlrpc] <4>[69305.029222] [] ldlm_cli_enqueue+0x3b4/0x760 [ptlrpc] <4>[69305.029250] [] mdc_enqueue+0x32b/0xf20 [mdc] <4>[69305.029273] [] lmv_enqueue+0x28b/0x700 [lmv] <4>[69305.029310] [] ll_file_flock+0x551/0xa70 [lustre] <4>[69305.029328] [] do_lock_file_wait+0x58/0x100 <4>[69305.029336] [] fcntl_setlk+0x12a/0x210 <4>[69305.029342] [] do_fcntl+0x23a/0x430 <4>[69305.029349] [] sys_fcntl+0x66/0xc0 <4>[69305.029356] [] system_call_fastpath+0x16/0x1b <4>[69305.029370] [<00007ffff7bcf822>] 0x7ffff7bcf821