Ceph » CephFS

Problem described here:

https://github.com/ceph/ceph-csi/pull/30#issuecomment-375331907

2018-03-22 13:47:50.337463 7f9cb0101080  0 ceph version 12.2.4 (52085d5249a80c5f5121a76d6288429f35e4e77b) luminous (stable), process (unknown), pid 286
2018-03-22 13:47:50.341988 7f9cb0101080 -1 init, newargv = 0x560e639a3f20 newargc=9
ceph-fuse[286]: starting ceph client
ceph-fuse[286]: starting fuse
terminate called after throwing an instance of 'std::bad_array_new_length'
  what():  std::bad_array_new_length
*** Caught signal (Aborted) **
 in thread 7f9ca21b9700 thread_name:ceph-fuse
 ceph version 12.2.4 (52085d5249a80c5f5121a76d6288429f35e4e77b) luminous (stable)
 1: (()+0x6d4784) [0x560e5a280784]
 2: (()+0x11390) [0x7f9caee89390]
 3: (gsignal()+0x38) [0x7f9cadc15428]
 4: (abort()+0x16a) [0x7f9cadc1702a]
 5: (__gnu_cxx::__verbose_terminate_handler()+0x16d) [0x7f9cae55884d]
 6: (()+0x8d6b6) [0x7f9cae5566b6]
 7: (()+0x8d701) [0x7f9cae556701]
 8: (()+0x8d919) [0x7f9cae556919]
 9: (()+0x8c662) [0x7f9cae555662]
 10: (()+0x23ef1b) [0x560e59deaf1b]
 11: (Client::_opendir(Inode*, dir_result_t**, UserPerm const&)+0x5e) [0x560e59e3112e]
 12: (Client::ll_opendir(Inode*, int, dir_result_t**, UserPerm const&)+0xd5) [0x560e59e31935]
 13: (()+0x213917) [0x560e59dbf917]
 14: (()+0x15f4c) [0x7f9cafa53f4c]
 15: (()+0x15679) [0x7f9cafa53679]
 16: (()+0x11e38) [0x7f9cafa4fe38]
 17: (()+0x76ba) [0x7f9caee7f6ba]
 18: (clone()+0x6d) [0x7f9cadce741d]
2018-03-22 13:47:57.499793 7f9ca21b9700 -1 *** Caught signal (Aborted) **
 in thread 7f9ca21b9700 thread_name:ceph-fuse

Looks like gid_count in UserPerm gets set to a negative value. Most likely cause appears to be here:

https://github.com/ceph/ceph/blob/44f16c903a88bd02cdf27100eaeb47dd67a1d802/src/client/fuse_ll.cc#L142

Note: problem does not exist on Jewel.