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
Issue
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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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