| Bug #72591 | minor memory leak on failure in function check_temp_dir | ||
|---|---|---|---|
| Submitted: | 9 May 2014 8:36 | ||
| Reporter: | Shane Bester (Platinum Quality Contributor) | Email Updates: | |
| Status: | Verified | Impact on me: | |
| Category: | MySQL Server: Replication | Severity: | S3 (Non-critical) |
| Version: | 5.6.20 | OS: | Any |
| Assigned to: | CPU Architecture: | Any | |
| Tags: | Leak, memory leak, slave_load_tmpdir | ||
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Description: Memory for unique_tmp_file_name is allocated via my_malloc but not freed if mysql_file_create failed to write into the slave_load_tmpdir. [ERROR] Slave SQL: Unable to use slave's temporary directory /slavetmp - Can't create/write to file '/slavetmp/SQL_LOAD-3b51bb28-d727-11e3-9464-08002705be5e' (Errcode: 13 - Permission denied), Error_code: 1 ==31785== 586 bytes in 1 blocks are definitely lost in loss record 1 of 1 ==31785== at 0x4A078E4: malloc (vg_replace_malloc.c:291) ==31785== by 0x8CF5F4: my_malloc (my_malloc.c:38) ==31785== by 0x89F356: handle_slave_sql (rpl_slave.cc:4570) ==31785== by 0x3FF8E07D13: start_thread (pthread_create.c:309) ==31785== by 0x35372F168C: clone (clone.S:115) How to repeat: read the code Suggested fix: === modified file 'sql/rpl_slave.cc' --- sql/rpl_slave.cc 2014-05-08 12:47:46 +0000 +++ sql/rpl_slave.cc 2014-05-09 08:34:04 +0000 @@ -4571,6 +4571,7 @@ unique_tmp_file_name, CREATE_MODE, O_WRONLY | O_BINARY | O_EXCL | O_NOFOLLOW, MYF(MY_WME))) < 0) + my_free(unique_tmp_file_name); DBUG_RETURN(1); /*