diff options
Diffstat (limited to 'mysys/mf_iocache.c')
| -rw-r--r-- | mysys/mf_iocache.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/mysys/mf_iocache.c b/mysys/mf_iocache.c index 51e8fe1a02f..448a2a42390 100644 --- a/mysys/mf_iocache.c +++ b/mysys/mf_iocache.c @@ -1,6 +1,6 @@ /* Copyright (c) 2000, 2011, Oracle and/or its affiliates - Copyright (c) 2010, 2015, MariaDB + Copyright (c) 2010, 2020, MariaDB This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -814,7 +814,8 @@ int _my_b_cache_read(IO_CACHE *info, uchar *Buffer, size_t Count) info->read_pos=info->buffer+Count; info->read_end=info->buffer+length; info->pos_in_file=pos_in_file; - memcpy(Buffer, info->buffer, Count); + if (Count) + memcpy(Buffer, info->buffer, Count); DBUG_RETURN(0); } @@ -1315,7 +1316,8 @@ static int _my_b_cache_read_r(IO_CACHE *cache, uchar *Buffer, size_t Count) DBUG_RETURN(1); } cnt= (len > Count) ? Count : len; - memcpy(Buffer, cache->read_pos, cnt); + if (cnt) + memcpy(Buffer, cache->read_pos, cnt); Count -= cnt; Buffer+= cnt; left_length+= cnt; |