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buckport to 5.1.26 from 6.0

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Bug#35658 (An empty binary value leads to mysqld crash)
  
Before this fix, the following token
  b''
caused the parser to crash when reading the binary value from the empty string.
The crash was caused by:
  ptr+= max_length - 1;
because max_length is unsigned and was 0, causing an overflow.
  
With this fix, an empty binary literal b'' is parsed as a binary value 0,
in Item_bin_string.
This commit is contained in:
Gleb Shchepa
2008-06-27 18:22:23 +05:00
parent 44811bbaa0
commit afa3d1207b
3 changed files with 77 additions and 11 deletions
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28
mysql-test/t/varbinary.test
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@ -104,3 +104,31 @@ show create table table_28127_b;
drop table table_28127_a;
drop table table_28127_b;
#
# Bug#35658 (An empty binary value leads to mysqld crash)
#
select 0b01000001;
select 0x41;
select b'01000001';
select x'41', 0+x'41';
select N'abc', length(N'abc');
select N'', length(N'');
select '', length('');
select b'', 0+b'';
select x'', 0+x'';
--error ER_BAD_FIELD_ERROR
select 0x;
--error ER_BAD_FIELD_ERROR
select 0b;