Sergey Vojtovich 3a50a8c9be MDEV-363 - Server crashes in intern_plugin_lock on concurrent installing ...

semisync plugin and setting rpl_semi_sync_master_enabled

There was race condition between INSTALL PLUGIN and SET. It was caused by a
gap in INSTALL PLUGIN when plugin variables were registered but not fully
initialized. Accessing such variables concurrently may reference uninitialized
memory, specifically sys_var_pluginvar::plugin.

Fixed by initializing sys_var_pluginvar::plugin early, before variable is
registered.

2015-06-09 23:24:02 +04:00

118 KiB

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