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mdbx: ensure checks to avoid using meta-pages.

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Change-Id: I21959b8a26961bb65f3bc3b87b24a3c4f6a673f7
This commit is contained in:
Leo Yuriev 2017-09-26 20:13:43 +03:00
parent dc31d7d1a3
commit 2ce817b438
1 changed files with 2 additions and 0 deletions
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2
src/mdbx.c
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@ -1687,6 +1687,7 @@ static int mdbx_page_alloc(MDBX_cursor *mc, unsigned num, MDBX_page **mp,
mdbx_debug("db %d use loose page %" PRIaPGNO, DDBI(mc), np->mp_pgno);
ASAN_UNPOISON_MEMORY_REGION(np, env->me_psize);
mdbx_tassert(txn, np->mp_pgno < txn->mt_next_pgno);
mdbx_ensure(env, np->mp_pgno >= NUM_METAS);
*mp = np;
return MDBX_SUCCESS;
}
@ -2015,6 +2016,7 @@ static int mdbx_page_alloc(MDBX_cursor *mc, unsigned num, MDBX_page **mp,
done:
mdbx_tassert(txn, mp && num);
mdbx_ensure(env, pgno >= NUM_METAS);
if (env->me_flags & MDBX_WRITEMAP) {
np = pgno2page(env, pgno);
/* LY: reset no-access flag from mdbx_kill_page() */