Ceph

crashed in ceph_test_objectstore

#0  0x00007f4bcd1b2fcb in raise () from /lib64/libpthread.so.0
#1  0x00007f4bcf394aa5 in reraise_fatal (signum=6) at global/signal_handler.cc:71
#2  handle_fatal_signal (signum=6) at global/signal_handler.cc:132
#3  <signal handler called>
#4  0x00007f4bcbfd15f7 in raise () from /lib64/libc.so.6
#5  0x00007f4bcbfd2ce8 in abort () from /lib64/libc.so.6
#6  0x00007f4bcf3d10c7 in ceph::__ceph_assert_fail (assertion=assertion@entry=0x7f4bcf51278e "r == 0", file=file@entry=0x7f4bcf501f03 "./common/RWLock.h", line=line@entry=124,
    func=func@entry=0x7f4bcf510360 <_ZZN6RWLock9get_writeEbE19__PRETTY_FUNCTION__> "void RWLock::get_write(bool)") at common/assert.cc:78
#7  0x00007f4bcf0069a6 in RWLock::get_write (lockdep=<optimized out>, this=0x7f4bbc3aa528) at common/RWLock.h:124
#8  0x00007f4bcf14f8bb in RWLock::get_write (this=0x7f4bbc3aa528, lockdep=<optimized out>) at common/RWLock.h:126
#9  0x00007f4bcf11dfa4 in WLocker (lock=..., this=<synthetic pointer>) at common/RWLock.h:183
#10 FileStore::_split_collection (this=this@entry=0x7f4bec7f6550, cid=..., bits=bits@entry=12, rem=rem@entry=2048, dest=..., spos=...) at os/filestore/FileStore.cc:5415
#11 0x00007f4bcf145cdb in FileStore::_do_transaction (this=this@entry=0x7f4bec7f6550, t=..., op_seq=op_seq@entry=4, trans_num=trans_num@entry=0,
    handle=handle@entry=0x7f4bc9feaea0) at os/filestore/FileStore.cc:2800
#12 0x00007f4bcf14a3db in FileStore::_do_transactions (this=this@entry=0x7f4bec7f6550, tls=std::vector of length 1, capacity 1 = {...}, op_seq=4,
    handle=handle@entry=0x7f4bc9feaea0) at os/filestore/FileStore.cc:2109
#13 0x00007f4bcf14a6dd in FileStore::_do_op (this=0x7f4bec7f6550, osr=0x7f4bee07b090, handle=...) at os/filestore/FileStore.cc:1879
#14 0x00007f4bcf3c223e in ThreadPool::worker (this=0x7f4bec7f6ff0, wt=0x7f4befd94810) at common/WorkQueue.cc:128
#15 0x00007f4bcf3c3120 in ThreadPool::WorkThread::entry (this=<optimized out>) at common/WorkQueue.h:440
#16 0x00007f4bcd1abdc5 in start_thread () from /lib64/libpthread.so.0
#17 0x00007f4bcc09228d in clone () from /lib64/libc.so.6

and

(gdb) f 11
#11 0x00007f4bcf145cdb in FileStore::_do_transaction (this=this@entry=0x7f4bec7f6550, t=..., op_seq=op_seq@entry=4, trans_num=trans_num@entry=0,
    handle=handle@entry=0x7f4bc9feaea0) at os/filestore/FileStore.cc:2800
(gdb) p op->cid
$23 = 0
(gdb) p op->dest_cid
$24 = 0

(gdb) thr 10
[Switching to thread 10 (Thread 0x7f4bcee064c0 (LWP 30816))]
#5  0x00007f4bcf07f236 in colsplittest (store=0x7f4bec7f6550, num_objects=10000, common_suffix_size=11) at test/objectstore/store_test.cc:3114
3114        r = apply_transaction(store, &osr, std::move(t));
(gdb) f 5
#5  0x00007f4bcf07f236 in colsplittest (store=0x7f4bec7f6550, num_objects=10000, common_suffix_size=11) at test/objectstore/store_test.cc:3114
(gdb) p *(ObjectStore::Transaction::Op *)0x7f4bd9717410
$142 = {op = 20, cid = 1, oid = 0, off = 0, len = 0, dest_cid = 0, dest_oid = 0, dest_off = 0, hint_type = 0, expected_object_size = 0,
  expected_write_size = 0, split_bits = 12, split_rem = 0}
(gdb) p *(ObjectStore::Transaction::Op *)0x7f4bd9717458
$143 = {op = 36, cid = 0, oid = 0, off = 0, len = 0, dest_cid = 0, dest_oid = 0, dest_off = 0, hint_type = 0, expected_object_size = 0,
  expected_write_size = 0, split_bits = 12, split_rem = 2048}

must be something wrong with Transaction::append().

https://github.com/ceph/ceph/pull/8364