Fix for bug #23810: Server crashes on various "show status ..." commands

We access some variable values using casts like *(long *) buff
that may cause crashes on some platforms (e.g. solaris 64) if buff is
not properly aligned.
Fix: align the buffer used.

1 files changed, 3 insertions, 1 deletions

diff --git a/sql/sql_show.cc b/sql/sql_show.cc
index e8107248c14..65506860e09 100644
--- a/sql/sql_show.cc
+++ b/sql/sql_show.cc
@@ -2035,7 +2035,9 @@ static bool show_status_array(THD *thd, const char *wild,
                               const char *prefix, TABLE *table,
                               bool ucase_names)
 {
-  char buff[SHOW_VAR_FUNC_BUFF_SIZE], *prefix_end;
+  MY_ALIGNED_BYTE_ARRAY(buff_data, SHOW_VAR_FUNC_BUFF_SIZE, long);
+  char * const buff= (char *) &buff_data;
+  char *prefix_end;
   /* the variable name should not be longer than 64 characters */
   char name_buffer[64];
   int len;