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Workaround VL32 cursor refcounting miscount
Don't try to deref cursor page if txn's pagelist is empty
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parent
15eb2bcf6f
commit
edfd7f6e07
1 changed files with 9 additions and 7 deletions
2
external/db_drivers/liblmdb/mdb.c
vendored
2
external/db_drivers/liblmdb/mdb.c
vendored
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@ -1953,6 +1953,7 @@ static void
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mdb_cursor_unref(MDB_cursor *mc)
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mdb_cursor_unref(MDB_cursor *mc)
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{
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{
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int i;
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int i;
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if (mc->mc_txn->mt_rpages[0].mid) {
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if (!mc->mc_snum || !mc->mc_pg[0] || IS_SUBP(mc->mc_pg[0]))
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if (!mc->mc_snum || !mc->mc_pg[0] || IS_SUBP(mc->mc_pg[0]))
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return;
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return;
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for (i=0; i<mc->mc_snum; i++)
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for (i=0; i<mc->mc_snum; i++)
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@ -1961,6 +1962,7 @@ mdb_cursor_unref(MDB_cursor *mc)
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mdb_page_unref(mc->mc_txn, mc->mc_ovpg);
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mdb_page_unref(mc->mc_txn, mc->mc_ovpg);
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mc->mc_ovpg = 0;
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mc->mc_ovpg = 0;
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}
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}
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}
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mc->mc_snum = mc->mc_top = 0;
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mc->mc_snum = mc->mc_top = 0;
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mc->mc_pg[0] = NULL;
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mc->mc_pg[0] = NULL;
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mc->mc_flags &= ~C_INITIALIZED;
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mc->mc_flags &= ~C_INITIALIZED;
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