talpa_syscallhook_unregister+0x85/0xd0 [talpa_syscallhook] が発生した後に rmmod コマンドがハングアップする
Issue
rmmod
コマンドがハングアップし、以下のメッセージが出力されます。
kernel:INFO: task rmmod:9447 blocked for more than 120 seconds.
kernel: Tainted:P --------------- 2.6.32-431.66.1.el6.x86_64 #1
kernel:"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kernel: rmmod D 000000000000000a 0 9447 9409 0x00000080
kernel: ffff88042b7f9e18 0000000000000086 0000000000000000 0000000000000286
kernel: ffff880473b88500 ffff880477411480 ffff880474362f00 0000000000000006
kernel: ffff880442729ab8 ffff88042b7f9fd8 000000000000ebc8 ffff880442729ab8
kernel:Call Trace:
kernel:[<ffffffffa01ee4f5>] talpa_syscallhook_unregister+0x85/0xd0 [talpa_syscallhook]
kernel:[<ffffffff8109af80>] ? autoremove_wake_function+0x0/0x40
kernel:[<ffffffff8152a8be>] ? mutex_lock+0x1e/0x50
kernel:[<ffffffffa0293b5f>] deleteVFSHookInterceptor+0x3f/0x250 [talpa_vfshook]
kernel:[<ffffffffa0296873>] talpa_vfshook_exit+0x2f/0x31 [talpa_vfshook]
kernel:[<ffffffff810b9194>] sys_delete_module+0x194/0x260
kernel:[<ffffffff8100b072>] system_call_fastpath+0x16/0x1b
Environment
- Red Hat Enterprise Linux 6
- talpa_syscallhook モジュール (サードパーティ提供)
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