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無名ページを解放しているときに unlink_anon_vmas() でカーネルがパニックになる

Solution Verified - Updated -

Issue

  • unlink_anon_vmas() ルーティンでシステムがクラッシュし、以下のパニックメッセージが発生します。

    kernel BUG at mm/rmap.c:381!
    invalid opcode:0000 [#1] SMP 
    ...
    RIP:0010:[<ffffffff8115c3c7>]  [<ffffffff8115c3c7>] unlink_anon_vmas+0x167/0x1b0
    ...
    Process <process> (pid:13043, threadinfo ffff88075c8b4000, task ffff8807da177520)
    ...
    Call Trace:
     [<ffffffff8114ecf4>] free_pgtables+0x44/0x120
     [<ffffffff811563f0>] exit_mmap+0xb0/0x180
     [<ffffffff8107474c>] mmput+0x6c/0x120
     [<ffffffff8107c22b>] exit_mm+0x12b/0x180
     [<ffffffff8107c5df>] do_exit+0x15f/0x870
     [<ffffffff81090eec>] ? send_sig+0x1c/0x20
     [<ffffffff8119d065>] ? pipe_write+0x5b5/0x6b0
     [<ffffffff8107cd48>] do_group_exit+0x58/0xd0
     [<ffffffff810929f6>] get_signal_to_deliver+0x1f6/0x460
     [<ffffffff8100a285>] do_signal+0x75/0x870
     [<ffffffff8123ee7f>] ? selinux_file_permission+0xbf/0x150
     [<ffffffff81231c26>] ? security_file_permission+0x16/0x20
     [<ffffffff81191e08>] ? vfs_write+0xb8/0x1a0
     [<ffffffff8100ab10>] do_notify_resume+0x90/0xc0
     [<ffffffff8100b3a1>] int_signal+0x12/0x17
    

Environment

  • Red Hat Enterprise Linux 6.6
    • kernel-2.6.32-504.43.1.el6
  • Red Hat Enterprise Linux 6.7
    • kernel-2.6.32-573.18.1.el6

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