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BUG#14303860 - EXECUTING A SELECT QUERY WITH TOO

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MANY WILDCARDS CAUSES A SEGFAULT
      Back port from 5.6 and trunk
This commit is contained in:
Neeraj Bisht
2013-01-14 16:51:52 +05:30
parent e810f7f4eb 78664f54a0
commit 1a951e716c
10 changed files with 144 additions and 49 deletions
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26
strings/ctype-simple.c
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@ -841,13 +841,16 @@ cnv:
#define INC_PTR(cs,A,B) (A)++
int my_wildcmp_8bit(CHARSET_INFO *cs,
const char *str,const char *str_end,
const char *wildstr,const char *wildend,
int escape, int w_one, int w_many)
static
int my_wildcmp_8bit_impl(CHARSET_INFO *cs,
const char *str,const char *str_end,
const char *wildstr,const char *wildend,
int escape, int w_one, int w_many, int recurse_level)
{
int result= -1; /* Not found, using wildcards */
if (my_string_stack_guard && my_string_stack_guard(recurse_level))
return 1;
while (wildstr != wildend)
{
while (*wildstr != w_many && *wildstr != w_one)
@ -907,8 +910,9 @@ int my_wildcmp_8bit(CHARSET_INFO *cs,
str++;
if (str++ == str_end) return(-1);
{
int tmp=my_wildcmp_8bit(cs,str,str_end,wildstr,wildend,escape,w_one,
w_many);
int tmp=my_wildcmp_8bit_impl(cs,str,str_end,
wildstr,wildend,escape,w_one,
w_many, recurse_level+1);
if (tmp <= 0)
return(tmp);
}
@ -919,6 +923,16 @@ int my_wildcmp_8bit(CHARSET_INFO *cs,
return(str != str_end ? 1 : 0);
}
int my_wildcmp_8bit(CHARSET_INFO *cs,
const char *str,const char *str_end,
const char *wildstr,const char *wildend,
int escape, int w_one, int w_many)
{
return my_wildcmp_8bit_impl(cs, str, str_end,
wildstr, wildend,
escape, w_one, w_many, 1);
}
/*
** Calculate min_str and max_str that ranges a LIKE string.