| Bug #40040 | Invalid read in mysql_stmt_fetch_column() when fetching several rows with blobs | ||
|---|---|---|---|
| Submitted: | 15 Oct 2008 10:01 | Modified: | 15 Nov 2008 11:12 |
| Reporter: | Sebastien FLAESCH | Email Updates: | |
| Status: | No Feedback | Impact on me: | |
| Category: | MySQL Server: C API (client library) | Severity: | S2 (Serious) |
| Version: | 5.1.28 | OS: | Linux (libc 2.3) |
| Assigned to: | CPU Architecture: | Any | |
| Tags: | blobs fetch mysql_stmt_fetch_column memory read | ||
[15 Oct 2008 11:00]
Sebastien FLAESCH
We don't get the valgrind error report with a MySQL 5.0.13 client.
[15 Oct 2008 11:12]
MySQL Verification Team
Please re-open this bug report when the test case is provided. Thanks in advance.
[16 Nov 2008 0:00]
Bugs System
No feedback was provided for this bug for over a month, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open".
Description: When fetching multiple rows with BLOB values by using the function: mysql_stmt_fetch_column() valgrind reports an invalid read in libmysqlclient.so: ==12155== Invalid read of size 8 ==12155== at 0x44EA488: (within /opt3/dbs/mys/5.1.28/lib/libmysqlclient.so.16.0.0) ==12155== by 0x44A707D: fetch_result_with_conversion (libmysql.c:4044) ==12155== by 0x44A67BA: mysql_stmt_fetch_column (libmysql.c:4662) ==12155== Address 0x40d1988 is 0 bytes after a block of size 43,624 alloc'd ==12155== at 0x4004825: malloc (vg_replace_malloc.c:207) ==12155== by 0x44AD36D: my_malloc (my_malloc.c:34) Tested with version 5.1.28, seems to be solved in 6.0.4, but should be fixed in 5.1.x ... How to repeat: We need to provide a test program in C to reproduce, where can we send this?