https://bugs.openldap.org/show_bug.cgi?id=9291
--- Comment #3 from Markus <[email protected]> --- I digged deeper and found the actual cause for the SIGBUS and it which might be simple to detect. In short, a meta page points to a page beyond the file. We could detect this in mdb_env_map and thus avoid the SIGBUS like this (first two lines exist and are for context): env->me_metas[0] = METADATA(p); env->me_metas[1] = (MDB_meta *)((char *)env->me_metas[0] + env->me_psize); mdb_size_t fsize; if(mdb_fsize(env->me_fd, &fsize) == MDB_SUCCESS && fsize) { pgno_t maxpgno = fsize / env->me_psize; if(env->me_metas[0]->mm_dbs[FREE_DBI].md_root > maxpgno || env->me_metas[0]->mm_dbs[MAIN_DBI].md_root > maxpgno || env->me_metas[1]->mm_dbs[FREE_DBI].md_root > maxpgno || env->me_metas[1]->mm_dbs[MAIN_DBI].md_root > maxpgno) { return MDB_PAGE_NOTFOUND; } } Would that basic consistency check work for you? Some background: file size was 2232320 (545 pages) and thus this new code caught the bad root at page 554. On odd thing was that I was able to see only 500 pages in the debugger's memory view; page 501 was already inaccessible. Didn't proceed there however... -- You are receiving this mail because: You are on the CC list for the issue.
