Details
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Bug
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Status: Open (View Workflow)
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Major
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Resolution: Unresolved
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10.5, 10.4(EOL)
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None
Description
Found in buildbot ,e.g
Windows:
https://buildbot.mariadb.org/#/builders/239/builds/20511/steps/10/logs/stdio for 10.5
https://buildbot.mariadb.org/#/builders/239/builds/19547/steps/10/logs/stdio for 10.4
Linux:
https://buildbot.mariadb.org/#/builders/497/builds/21712/steps/6/logs/stdio
The exception analysis points to null pointer deference.
Note1: Crash happens on a 3rd rerun of plugins.thread_pool_server_audit - the first attempt failed with a diff similar to below, the second retry succeeded.
CURRENT_TEST: plugins.thread_pool_server_audit
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--- D:/Buildbot/amd64-windows-packages/build/mysql-test/suite/plugins/r/thread_pool_server_audit.result 2024-05-03 23:05:21.000000000 +0200
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+++ D:\Buildbot\amd64-windows-packages\build\mysql-test\suite\plugins\r\thread_pool_server_audit.reject 2024-05-03 23:39:27.543299600 +0200
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@@ -241,8 +241,8 @@
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Warning 1620 Plugin is busy and will be uninstalled on shutdown
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TIME,HOSTNAME,root,localhost,ID,ID,QUERY,test,'set global server_audit_logging=on',0
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TIME,HOSTNAME,root,localhost,ID,0,CONNECT,mysql,,0
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-TIME,HOSTNAME,root,localhost,ID,0,DISCONNECT,mysql,,0
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TIME,HOSTNAME,no_such_user,localhost,ID,0,FAILED_CONNECT,,,ID
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+TIME,HOSTNAME,root,localhost,ID,0,DISCONNECT,mysql,,0
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TIME,HOSTNAME,no_such_user,localhost,ID,0,DISCONNECT,,,0
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TIME,HOSTNAME,root,localhost,ID,ID,QUERY,test,'set global server_audit_incl_users=\'odin, dva, tri\'',0
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TIME,HOSTNAME,root,localhost,ID,ID,QUERY,test,'set global server_audit_incl_users=\'odin, root, dva, tri\'',0
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Note3: the null pointer is returned by THDVAR(thd, loc_info) (see below, under FAULTING_SOURCE_CODE)
Note4: The query that causes crash is
install plugin server_audit soname 'server_audit' |
Excerpt from crash analysis
CONTEXT: (.ecxr)
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rax=000001c38e9225c0 rbx=0000003c49afe2f0 rcx=000001c38e7468c8
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rdx=0000000000000058 rsi=0000000000000000 rdi=0000000000000000
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rip=00007ffa25922256 rsp=0000003c49afdd70 rbp=0000000000000000
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r8=0000003c49afe201 r9=00007ffa25930f50 r10=0000003c49afe2e0
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r11=0000003c49afdd60 r12=000001c38e7497f8 r13=000000000000022c
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r14=0000000000000003 r15=000001c38e74fe00
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iopl=0 nv up ei pl nz ac po nc
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cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010216
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server_audit!get_loc_info [inlined in server_audit!auditing]:
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cmp dword ptr [rsi+154h],40h ds:00000000`00000154=????????
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Resetting default scope
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EXCEPTION_RECORD: (.exr -1)
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ExceptionAddress: 00007ffa25922256 (server_audit!get_loc_info)
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ExceptionCode: c0000005 (Access violation)
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ExceptionFlags: 00000000
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NumberParameters: 2
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Parameter[0]: 0000000000000000
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Parameter[1]: 0000000000000154
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Attempt to read from address 0000000000000154
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 |
....
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STACK_TEXT:
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server_audit!auditing
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server!mysql_audit_notify
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server!mysql_audit_general
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server!dispatch_command
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server!do_command
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server!tp_callback
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ntdll!RtlInitializeCriticalSection
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ntdll!RtlAcquireSRWLockExclusive
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kernel32!BaseThreadInitThunk
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ntdll!RtlUserThreadStart
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STACK_COMMAND: .ecxr ; kb ; ** Pseudo Context ** Pseudo ** Value: 165766b0c80 ** ; kb
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FAULTING_SOURCE_LINE: D:\Buildbot\amd64-windows-packages\build\plugin\server_audit\server_audit.c
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FAULTING_SOURCE_FILE: D:\Buildbot\amd64-windows-packages\build\plugin\server_audit\server_audit.c
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FAULTING_SOURCE_LINE_NUMBER: 2157
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FAULTING_SOURCE_CODE:
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951: bach to this as the MENT-1438 is finally understood/resolved.
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952: return (struct connection_info *) THDVAR(thd, loc_info);
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953: */
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954: struct connection_info *ci= (struct connection_info *) THDVAR(thd, loc_info);
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> 955: if ((size_t) ci->user_length > sizeof(ci->user))
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956: {
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957: ci->user_length= 0;
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958: ci->host_length= 0;
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959: ci->ip_length= 0;
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960: }
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 |
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.....
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rax=000001c38e9225c0 rbx=0000003c49afe2f0 rcx=000001c38e7468c8
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rdx=0000000000000058 rsi=0000000000000000 rdi=0000000000000000
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rip=00007ffa25922256 rsp=0000003c49afdd70 rbp=0000000000000000
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r8=0000003c49afe201 r9=00007ffa25930f50 r10=0000003c49afe2e0
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r11=0000003c49afdd60 r12=000001c38e7497f8 r13=000000000000022c
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r14=0000000000000003 r15=000001c38e74fe00
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iopl=0 nv up ei pl nz ac po nc
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cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010216
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server_audit!get_loc_info [inlined in server_audit!auditing]:
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cmp dword ptr [rsi+154h],40h ds:00000000`00000154=????????
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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(Inline Function) --------`-------- server_audit!get_loc_info [D:\Buildbot\amd64-windows-packages\build\plugin\server_audit\server_audit.c @ 955]
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struct connection_info * ci = 0x00000000`00000000
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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server_audit!auditing [D:\Buildbot\amd64-windows-packages\build\plugin\server_audit\server_audit.c @ 2157]
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void * thd = <value unavailable>
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unsigned int event_class = 0
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void * ev = 0x0000003c`49afe2f0
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int after_action = 0n0
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struct connection_info * cn = <value unavailable>
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unsigned int64 events = <value unavailable>
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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(Inline Function) --------`-------- server!plugins_dispatch [D:\Buildbot\amd64-windows-packages\build\sql\sql_audit.cc @ 399]
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struct st_mysql_audit * data = 0x00007ffa`25930f50
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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server!mysql_audit_notify [D:\Buildbot\amd64-windows-packages\build\sql\sql_audit.cc @ 437]
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class THD * thd = 0x000001c3`8e7468c8
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unsigned int event_class = 0x58
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void * event = 0x0000003c`49afe201
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struct st_mysql_event_generic event_generic = struct st_mysql_event_generic
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struct st_plugin_int ** plugins_last = 0x000001c3`8e922110
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struct st_plugin_int ** plugins = 0x000001c3`8e922108
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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server!mysql_audit_general [D:\Buildbot\amd64-windows-packages\build\sql\sql_audit.h @ 195]
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class THD * thd = 0x000001c3`8e7468c8
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unsigned int event_subtype = 0x58
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int error_code = 0n1236263425
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char * msg = 0x00000000`00000000 ""
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char [513] user_buff = char [513] "root[root] @ localhost [::1]"
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struct mysql_event_general event = struct mysql_event_general
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struct st_mysql_const_lex_string null_clex_str = <value unavailable>
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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server!dispatch_command [D:\Buildbot\amd64-windows-packages\build\sql\sql_parse.cc @ 2494]
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enum_server_command command = COM_QUERY (0n3)
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class THD * thd = 0x000001c3`8e7468c8
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char * packet = <value unavailable>
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unsigned int packet_length = <value unavailable>
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bool is_com_multi = false
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bool is_next_command = true
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bool error = false
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struct st_net * net = <value unavailable>
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struct st_mysql_const_lex_string tmp = struct st_mysql_const_lex_string
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struct charset_info_st * save_character_set_results = 0x00000000`00000003
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struct charset_info_st * save_character_set_client = 0x000001c3`8e7497f8
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struct user_conn * save_user_connect = <value unavailable>
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int auth_rc = 0n0
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class Security_context save_security_ctx = class Security_context
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struct st_mysql_const_lex_string save_db = struct st_mysql_const_lex_string
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struct charset_info_st * save_collation_connection = 0x00000000`0000022c
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char * packet_end = 0x000001c3`8e74fe91 "--- memory read error at address 0x000001c3`8e74fe91 ---"
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class Parser_state parser_state = class Parser_state
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unsigned long length = <value unavailable>
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char * beginning_of_next_stmt = 0x00000000`00000000 ""
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char * fields = 0x00000000`00000000 ""
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char * packet_end = 0x00000000`00000003 "--- memory read error at address 0x00000000`00000003 ---"
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struct TABLE_LIST table_list = struct TABLE_LIST
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class MDL_savepoint mdl_savepoint = class MDL_savepoint
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struct st_mysql_const_lex_string db = struct st_mysql_const_lex_string
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char * arg_end = <value unavailable>
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struct st_mysql_lex_string table_name = struct st_mysql_lex_string
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struct st_schema_table * schema_table = <value unavailable>
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unsigned short flags = 0x97f8
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unsigned int64 nlen = <value unavailable>
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unsigned int slave_server_id = <value unavailable>
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unsigned long pos = <value unavailable>
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unsigned int64 options = 0
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int not_used = 0n3
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unsigned long uptime = <value unavailable>
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char [250] buff = char [250] ""
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unsigned int64 length = <value unavailable>
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unsigned int64 queries_per_second1000 = <value unavailable>
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struct system_status_var * current_global_status_var = <value unavailable>
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unsigned int opt_command = <value unavailable>
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unsigned int current_com = 0x8e7497f8
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char * packet_start = 0x00000000`00000004 "--- memory read error at address 0x00000000`00000004 ---"
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struct PSI_statement_locker * save_locker = 0x0000003c`49afe724
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unsigned char * readbuff = 0x645c7473`65745c2e "--- memory read error at address 0x645c7473`65745c2e ---"
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unsigned int64 next_length_length = 3
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unsigned int64 next_subpacket_length = 0x00007ff9`ecc63478
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struct sql_digest_state * save_digest = 0x00000000`00000000
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unsigned int64 subpacket_length = <value unavailable>
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unsigned int64 length_length = 0x000001c3`8e74fe91
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struct st_mysql_const_lex_string empty_clex_str = <value unavailable>
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struct charset_info_st * files_charset_info = <value unavailable>
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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server!do_command [D:\Buildbot\amd64-windows-packages\build\sql\sql_parse.cc @ 1375]
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class THD * thd = 0x000001c3`8e7468c8
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bool return_value = true
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unsigned long packet_length = 0x32
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char * packet = 0x000001c3`8f830098 "--- memory read error at address 0x000001c3`8f830098 ---"
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struct st_net * net = 0x000001c3`8e746b38
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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(Inline Function) --------`-------- server!threadpool_process_request [D:\Buildbot\amd64-windows-packages\build\sql\threadpool_common.cc @ 365]
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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server!tp_callback [D:\Buildbot\amd64-windows-packages\build\sql\threadpool_common.cc @ 199]
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struct TP_connection * c = 0x000001c3`8e85eff0
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struct Worker_thread_context worker_context = struct Worker_thread_context
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class THD * thd = 0x000001c3`8e7468c8
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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