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Aria now marks not used varchar space with MEM_UNDEFINED on read.

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This commit is contained in:
Monty 2021-06-09 14:48:28 +03:00
parent 15d2a6cfa3
commit 8d37ef2999
2 changed files with 7 additions and 1 deletions
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6
storage/maria/ma_blockrec.c
View File

@ -4912,9 +4912,11 @@ int _ma_read_block_record2(MARIA_HA *info, uchar *record,
case FIELD_VARCHAR:
{
ulong length;
uint pack_length __attribute__((unused));
if (column->length <= 256)
{
length= (uint) (uchar) (*field_pos++= *field_length_data++);
pack_length= 1;
}
else
{
@ -4923,14 +4925,16 @@ int _ma_read_block_record2(MARIA_HA *info, uchar *record,
field_pos[1]= field_length_data[1];
field_pos+= 2;
field_length_data+= 2;
pack_length= 2;
}
#ifdef SANITY_CHECKS
if (length > column->length)
if (length > column->length - pack_length)
goto err;
#endif
if (read_long_data(info, field_pos, length, &extent, &data,
&end_of_data))
DBUG_RETURN(my_errno);
MEM_UNDEFINED(field_pos + length, column->length - length - pack_length);
break;
}
case FIELD_BLOB:

2
storage/maria/ma_dynrec.c
View File

@ -1297,6 +1297,8 @@ size_t _ma_rec_unpack(register MARIA_HA *info, register uchar *to, uchar *from,
if (from+length > from_end)
goto err;
memcpy(to+pack_length, from, length);
MEM_UNDEFINED(to+pack_length + length,
column_length - length - pack_length);
from+= length;
min_pack_length--;
continue;