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mdbx: more checks for mdbx_replace().

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This commit is contained in:
Leo Yuriev 2017-01-26 23:12:31 +03:00
parent cc6e1c5119
commit a148bcea70
1 changed files with 3 additions and 1 deletions
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4
mdbx.c
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@ -411,7 +411,7 @@ int mdbx_replace(MDB_txn *txn, MDB_dbi dbi,
MDB_cursor mc;
MDB_xcursor mx;
if (unlikely(!key || !old_data || !txn))
if (unlikely(!key || !old_data || !txn || old_data == new_data))
return EINVAL;
if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE))
@ -449,6 +449,8 @@ int mdbx_replace(MDB_txn *txn, MDB_dbi dbi,
goto bailout;
} else {
/* в old_data буфер получения предыдущего значения */
if (unlikely(new_data && old_data->iov_base == new_data->iov_base))
return EINVAL;
MDB_val present_data;
rc = mdbx_cursor_get(&mc, &present_key, &present_data, MDB_SET_KEY);
if (unlikely(rc != MDB_SUCCESS)) {