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-rw-r--r--strings/ctype-uca.c22
1 files changed, 20 insertions, 2 deletions
diff --git a/strings/ctype-uca.c b/strings/ctype-uca.c
index 60de0a106a1..2351ee9d932 100644
--- a/strings/ctype-uca.c
+++ b/strings/ctype-uca.c
@@ -1,5 +1,5 @@
/* Copyright (c) 2004, 2013, Oracle and/or its affiliates.
- Copyright (c) 2009, 2014, SkySQL Ab.
+ Copyright (c) 2009, 2015, MariaDB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
@@ -20583,7 +20583,25 @@ static int my_uca_scanner_next_any(my_uca_scanner *scanner)
if (((mblen= scanner->cs->cset->mb_wc(scanner->cs, wc,
scanner->sbeg,
scanner->send)) <= 0))
- return -1;
+ {
+ if (scanner->sbeg >= scanner->send)
+ return -1; /* No more bytes, end of line reached */
+ /*
+ There are some more bytes left. Non-positive mb_len means that
+ we got an incomplete or a bad byte sequence. Consume mbminlen bytes.
+ */
+ if ((scanner->sbeg+= scanner->cs->mbminlen) > scanner->send)
+ {
+ /* For safety purposes don't go beyond the string range. */
+ scanner->sbeg= scanner->send;
+ }
+ /*
+ Treat every complete or incomplete mbminlen unit as a weight which is
+ greater than weight for any possible normal character.
+ 0xFFFF is greater than any possible weight in the UCA weight table.
+ */
+ return 0xFFFF;
+ }
scanner->sbeg+= mblen;
if (wc[0] > scanner->level->maxchar)