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ITS#7733 check cursor index before cursor_del

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This commit is contained in:
Howard Chu 2013-10-28 07:25:54 -07:00
parent 742a078ea5
commit d8eccb353b
1 changed files with 10 additions and 4 deletions
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14
libraries/liblmdb/mdb.c
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@ -5420,8 +5420,9 @@ mdb_cursor_get(MDB_cursor *mc, MDB_val *key, MDB_val *data,
rc = EINVAL;
} else {
MDB_page *mp = mc->mc_pg[mc->mc_top];
if (!NUMKEYS(mp)) {
mc->mc_ki[mc->mc_top] = 0;
int nkeys = NUMKEYS(mp);
if (!nkeys || mc->mc_ki[mc->mc_top] >= nkeys) {
mc->mc_ki[mc->mc_top] = nkeys;
rc = MDB_NOTFOUND;
break;
}
@ -6069,6 +6070,7 @@ int
mdb_cursor_del(MDB_cursor *mc, unsigned int flags)
{
MDB_node *leaf;
MDB_page *mp;
int rc;
if (mc->mc_txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_ERROR))
@ -6077,6 +6079,10 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags)
if (!(mc->mc_flags & C_INITIALIZED))
return EINVAL;
mp = mc->mc_pg[mc->mc_top];
if (mc->mc_ki[mc->mc_top] >= NUMKEYS(mp))
return MDB_NOTFOUND;
if (!(flags & MDB_NOSPILL) && (rc = mdb_page_spill(mc, NULL, NULL)))
return rc;
@ -6084,9 +6090,9 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags)
if (rc)
return rc;
leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]);
if (!IS_LEAF2(mc->mc_pg[mc->mc_top]) && F_ISSET(leaf->mn_flags, F_DUPDATA)) {
if (!IS_LEAF2(mp) && F_ISSET(leaf->mn_flags, F_DUPDATA)) {
if (!(flags & MDB_NODUPDATA)) {
if (!F_ISSET(leaf->mn_flags, F_SUBDATA)) {
mc->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf);