MDEV-11241 Certain combining marks cause MariaDB to crash when doing Full-Text searches

Don't assume that a word of n bytes can match a word of
at most n * charset->mbmaxlen bytes, always go for the worst.

1 files changed, 7 insertions, 0 deletions

diff --git a/mysql-test/r/fulltext_charsets.result b/mysql-test/r/fulltext_charsets.result
new file mode 100644
index 00000000000..39ce02a3fce
--- /dev/null
+++ b/mysql-test/r/fulltext_charsets.result
@@ -0,0 +1,7 @@
+set names utf8mb4;
+create table t1 (a int, b text, fulltext (b)) charset=utf8mb4 collate=utf8mb4_unicode_ci;
+insert t1 values (1000, 'C͓̙̯͔̩ͅͅi̩̘̜̲a̯̲̬̳̜̖̤o͕͓̜͓̺̖̗,̠̬͚ ̺T͇̲h͈̱e ̬̜D̖o̦̖͔̗͖̩̘c̣̼t̝͉̫̮̗o͉̫̭r̙͎̗.͓̪̥');
+select a from t1 where match(b) against ('ciao' in boolean mode);
+a
+1000
+drop table t1;