Details
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Type:
Bug
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: 5.5.41, 10.0
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Component/s: Scripts & Clients
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Labels:None
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Environment:Linux
Description
"mysqladmin" crash on execution of below command:
# mysqladmin -u root -p mysqladmin Ver 9.0 Distrib 5.5.41-MariaDB, for Linux on s390x Copyright (c) 2000, 2014, Oracle, MariaDB Corporation Ab and others. Administration program for the mysqld daemon. Usage: mysqladmin [OPTIONS] command command.... Default options are read from the following files in the given order: Segmentation fault (core dumped)
This error occurs only when no options is sent with the mysqladmin command.
If I downgrade mariadb packages to version 5.5.37-1.el7, not getting core dump.
Version-Release number of selected component (if applicable):
mariadb-5.5.41-2.el7_0
How reproducible:
Always
Steps to Reproduce:
1. Install mariadb version 5.5.41-2.el7 packages on system and execute below command:
# mysqladmin -u root -p
Backtrace from the coredump generated on local test system:
Using host libthread_db library "/lib64/libthread_db.so.1". Core was generated by `mysqladmin -u root -p'. Program terminated with signal 11, Segmentation fault. #0 0x00007f4cb75224bd in malloc_consolidate (av=av@entry=0x7f4cb7860760 <main_arena>) at malloc.c:4129 4129 unlink(av, nextchunk, bck, fwd); (gdb) bt #0 0x00007f4cb75224bd in malloc_consolidate (av=av@entry=0x7f4cb7860760 <main_arena>) at malloc.c:4129 #1 0x00007f4cb75230e7 in _int_free (av=0x7f4cb7860760 <main_arena>, p=0x7f4cba6ce8b0, have_lock=0) at malloc.c:4021 #2 0x00007f4cb8d5da48 in free_root (root=root@entry=0x7fff66a257c0, MyFlags=MyFlags@entry=0) at /usr/src/debug/mariadb-5.5.41/mysys/my_alloc.c:372 #3 0x00007f4cb8d682bd in my_print_default_files (conf_file=0x7f4cb8d7ff84 "my") at /usr/src/debug/mariadb-5.5.41/mysys/default.c:1075 #4 0x00007f4cb8d68348 in print_defaults (conf_file=<optimized out>, groups=0x7f4cb91f85e0 <load_default_groups>) at /usr/src/debug/mariadb-5.5.41/mysys/default.c:1083 #5 0x00007f4cb8d37cf7 in usage () at /usr/src/debug/mariadb-5.5.41/client/mysqladmin.cc:1235 #6 0x00007f4cb8d37ad6 in main (argc=0, argv=0x7f4cba6ce7a0) at /usr/src/debug/mariadb-5.5.41/client/mysqladmin.cc:330 (gdb)
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10.0.17 is affected as well, even though I didn't see it crash (memory corruption caused probably less damage than in 5.5.x).
I've reproduced it on x86_64 as well, it doesn't seem to be specific to s390x.
Oh you are right, sorry. I ran mysqladmin -uroot -p and it worked okay, but mysqladmin -u root -p crashes.
This is a proposed patch.
I think the issue is caused by working with
item in case argc == 0. The attached patch should hopefully prevent that issue.