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  1. MariaDB Server
  2. MDEV-18509

Crashes server with segfault during role gratns

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      Description

      Similar to MDEV-17898 server crash during massive role grants.

      10.2.21

      Server version: 10.2.21-MariaDB-log
      key_buffer_size=134217728
      read_buffer_size=131072
      max_used_connections=0
      max_threads=502
      thread_count=9
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1234101 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
      Thread pointer: 0x55a049a67238
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7ffe71dc70c0 thread_stack 0x49000
      /usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x55a0473d3dbe]
      mysys/stacktrace.c:268(my_print_stacktrace)[0x55a046e5aec5]
      sigaction.c:0(__restore_rt)[0x7f5fcf2c35d0]
      :0(__strcmp_sse42)[0x7f5fcd69f01a]
      /usr/sbin/mysqld(+0x47cc42)[0x55a046c68c42]
      sql/sql_acl.cc:5946(merge_role_db_privileges)[0x55a046c5b80d]
      sql/sql_acl.cc:5717(traverse_role_graph_impl(ACL_USER_BASE*, void*, long, int (*)(ACL_USER_BASE*, void*), int (*)(ACL_USER_BASE*, ACL_ROLE*, void*)) [clone .constprop.293])[0x55a046c5ba14]
      mysys/hash.c:796(my_hash_iterate)[0x55a0473b1d4c]
      sql/sql_acl.cc:7493(grant_reload(THD*))[0x55a046c6a730]
      sql/sql_acl.cc:7248(grant_init())[0x55a046c6aa03]
      sql/mysqld.cc:5947(mysqld_main(int, char**))[0x55a046c38aec]
      /lib64/libc.so.6(__libc_start_main+0xf5)[0x7f5fcd5833d5]
      /usr/sbin/mysqld(+0x4403fd)[0x55a046c2c3fd]
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x0): 
      Connection ID (thread ID): 0
      Status: NOT_KILLED
      
      

      Same with
      10.3.12

      90121 13:13:57 server_audit: logging started to the file /opt/mariadb/log/mariadb/server_audit_s00249177uv.ads.provinzial.com.log.
      2019-01-21 13:13:57 0 [Note] Server socket created on IP: '::'.
      190121 13:13:57 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see https://mariadb.com/kb/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed, 
      something is definitely wrong and this may fail.
       
      Server version: 10.3.12-MariaDB-log
      key_buffer_size=134217728
      read_buffer_size=131072
      max_used_connections=0
      max_threads=502
      thread_count=9
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1234594 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x560bf08e1618
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7fff5f5ee620 thread_stack 0x49000
      /usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x560bd9180d1e]
      /usr/sbin/mysqld(handle_fatal_signal+0x357)[0x560bd8c21d97]
      /lib64/libpthread.so.0(+0xf5d0)[0x7fd0a5d285d0]
      /lib64/libc.so.6(+0x13e01a)[0x7fd0a410401a]
      /usr/sbin/mysqld(+0x534b72)[0x560bd89dbb72]
      /usr/sbin/mysqld(+0x526fbd)[0x560bd89cdfbd]
      /usr/sbin/mysqld(+0x5271d4)[0x560bd89ce1d4]
      /usr/sbin/mysqld(my_hash_iterate+0x4c)[0x560bd915eaec]
      /usr/sbin/mysqld(_Z12grant_reloadP3THD+0xd27)[0x560bd89ddb07]
      /usr/sbin/mysqld(_Z10grant_initv+0x55)[0x560bd89dddf5]
      /usr/sbin/mysqld(_Z11mysqld_mainiPPc+0xc5c)[0x560bd89989dc]
      /lib64/libc.so.6(__libc_start_main+0xf5)[0x7fd0a3fe83d5]
      /usr/sbin/mysqld(+0x4e476d)[0x560bd898b76d]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x0): 
      Connection ID (thread ID): 0
      Status: NOT_KILLED
       
      Optimizer switch:
      

      gdb extract is attached.

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              Assignee:
              Unassigned
              Reporter:
              Richard Richard Stracke
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                Updated:
                Resolved:

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