x86_64 システムで Bad pagetable panic を確認する
Issue
- “Bad pagetable:” を含むメッセージがシステムに表示されます。
- ページディレクトリに設定した予約ビットを CPU が検出すると、bad page table panic が Page Fault Exception によって発生します。
a.out:Corrupted page table at address 2ab3401d3010
PGD 1102b1067 PUD 10f109067 PMD 10f0fc067 PTE 800040010d2b1067
Bad pagetable:000f [1] SMP
...
Modules linked in: crash autofs4 hidp rfcomm l2cap bluetooth lockd sunrpc be2iscsi ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp bnx2i cnic ipv6 xfrm_nalgo crypto_api uio cxgb3i libcxgbi cxgb3 8021q libiscsi_tcp libiscsi2 scsi_transport_iscsi2 scsi_transport_iscsi dm_multipath scsi_dh video backlight sbs power_meter hwmon i2c_ec dell_wmi wmi button battery asus_acpi acpi_memhotplug ac parport_pc lp parport floppy virtio_balloon snd_hda_intel snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device virtio_net snd_pcm_oss snd_mixer_oss snd_pcm i2c_piix4 snd_timer snd_page_alloc tpm_tis snd_hwdep i2c_core snd tpm serio_raw pcspkr tpm_bios soundcore dm_raid45 dm_message dm_region_hash dm_mem_cache dm_snapshot dm_zero dm_mirror dm_log dm_mod ata_piix libata sd_mod scsi_mod virtio_blk virtio_pci virtio_ring virtio ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid:3801, comm: a.out Tainted:G -------------------- 2.6.18-371.6.1.el5 #1
RIP:0033:[<0000000000400624>] [<0000000000400624>]
RSP:002b:00007ffffcfbb380 EFLAGS:00010206
RAX:00002ab3401d3010 RBX:0000003973a1cbc0 RCX:0000000000600b25
RDX:0000003973f54970 RSI:0000000000600b26 RDI:0000003973f536a0
RBP:00007ffffcfbb390 R08:000000000000000a R09:0000000000000000
R10:0000000000000022 R11:0000000000000246 R12:0000000000000000
R13:00007ffffcfbb470 R14:0000000000000000 R15:0000000000000000
FS:00002ab3401d26e0(0000) GS:ffffffff80436000(0000) knlGS:0000000000000000
CS:0010 DS:0000 ES:0000 CR0:000000008005003b
CR2:00002ab3401d3010 CR3:000000011ced3000 CR4:00000000000006e0
Process a.out (pid:3801, threadinfo ffff810104330000, task ffff81011fa827b0)
RIP [<0000000000400624>]
RSP <00007ffffcfbb380>
crash>
Environment
- アーキテクチャー x86_64
- Red Hat Enterprise Linux 5 ~ 7
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