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MDEV-17589: Stack-buffer-overflow with indexed varchar (utf8) field

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Create a new constant MAX_DATA_LENGTH_FOR_KEY.
Replace the value of MAX_KEY_LENGTH to also include the LENGTH and NULL BYTES
of a field.
This commit is contained in:
Varun Gupta
2018-12-19 10:34:30 +05:30
parent da4efd56aa
commit 7e606a2d5c
6 changed files with 79 additions and 7 deletions
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4
sql/partition_info.cc
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@@ -1990,12 +1990,12 @@ bool partition_info::check_partition_field_length()
for (i= 0; i < num_part_fields; i++)
store_length+= get_partition_field_store_length(part_field_array[i]);
if (store_length > MAX_KEY_LENGTH)
if (store_length > MAX_DATA_LENGTH_FOR_KEY)
DBUG_RETURN(TRUE);
store_length= 0;
for (i= 0; i < num_subpart_fields; i++)
store_length+= get_partition_field_store_length(subpart_field_array[i]);
if (store_length > MAX_KEY_LENGTH)
if (store_length > MAX_DATA_LENGTH_FOR_KEY)
DBUG_RETURN(TRUE);
DBUG_RETURN(FALSE);
}