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(ITS#8443) segfault in lmdb following mdb_env_set_mapsize
Full_Name: George Dochev
Submission from: (NULL) (2601:582:4500:e134:1d59:965c:aecc:5697)
I updated from 0.9.15 to 0.9.18 and started getting intermittent segfaults in
one of my unit tests. In my test when I issue mdb_txn_commit and get back
MDB_MAP_FULL I abort the transaction, expand the database through a call to
mdb_env_set_mapsize and attempt a retry. In the retry I issue mdb_txn_begin
again which is where I crash when it calls mdb_txn_renew0(MDB_txn *txn) with txn
pointing to garbage.
Some additional info which may or may not be relevant:
The db size is 1MB aligned and there are no active transactions prior to the
call to mdb_env_set_mapsize other than the one that I aborted as a result of the
The environment was initially opened with MDB_NOSYNC | MDB_WRITEMAP |
MDB_NOMETASYNC | MDB_NOTLS.
The crash is intermittent but reproducible in all my configurations.