From 9dd5bc3843a44072cc7f211b6ad8cf3102e81cc1 Mon Sep 17 00:00:00 2001 From: "ingo@mysql.com" <> Date: Wed, 28 Jun 2006 16:07:39 +0200 Subject: [PATCH] Bug#19835 - Binary copy of corrupted tables crash the server when issuing a query A corrupt table with dynamic record format can crash the server when trying to select from it. I fixed the crash that resulted from the particular type of corruption that has been reported for this bug. No test case. To test it, one needs a table with a very special corruption. The bug report contains a file with such a table. --- myisam/mi_dynrec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/myisam/mi_dynrec.c b/myisam/mi_dynrec.c index 43783ca2d36..1b691c955f1 100644 --- a/myisam/mi_dynrec.c +++ b/myisam/mi_dynrec.c @@ -1116,6 +1116,9 @@ int _mi_read_dynamic_record(MI_INFO *info, my_off_t filepos, byte *buf) info->rec_cache.pos_in_file <= block_info.next_filepos && flush_io_cache(&info->rec_cache)) goto err; + /* A corrupted table can have wrong pointers. (Bug# 19835) */ + if (block_info.next_filepos == HA_OFFSET_ERROR) + goto panic; info->rec_cache.seek_not_done=1; if ((b_type=_mi_get_block_info(&block_info,file, block_info.next_filepos))