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dolohow
BUG at mm/uksm.c in kernel logs
Hi. while trying uksm on a 5.0.x kernel, and while doing some intensive I/O on a high loaded host I noticed that sometimes in kernel logs I obtain the following error:
kernel: kernel BUG at mm/uksm.c:3322! kernel: invalid opcode: 0000 [#1] PREEMPT SMP PTI kernel: CPU: 1 PID: 218 Comm: uksmd Tainted: P IO 5.0.10-1 #1 ... kernel: RIP: 0010:scan_vma_one_page+0xb52/0x1350 ... kernel: ? sleep_millisecs_store+0x80/0x80 kernel: ? sradix_tree_next+0xcb/0x150 kernel: uksm_do_scan+0x143/0x2170 kernel: ? __next_timer_interrupt+0xc0/0xc0 kernel: ? uksm_do_scan+0x2170/0x2170 kernel: uksm_scan_thread+0x13c/0x170 kernel: ? __kthread_parkme+0x4c/0x70 kernel: kthread+0x113/0x130 kernel: ? kthread_create_on_node+0x60/0x60 kernel: ret_from_fork+0x35/0x40
Poking around into older log with journalctl, I found that this error was sometimes there (also on different hardware), at least since kernel 4.20.3. The lines in mm/uksm.c corresponding to the error above is always the following one:
BUG_ON(addr > slot->vma->vm_end || addr < slot->vma->vm_start);
what exactly this could be related to? Apparently seems something related to transfers out of boundaries?
It may be related to this bug because the proposed fix is still not included in the current release.
The proposed fix seems to be partially obfuscated by the MD formatting. I guess the suggested patch is like this one I'm going to attach, that I'm going to test.
uksm-check-scan-entry-return-value-get_next_rmap_item.patch.txt
Even with that patch I get the same reports, just changed (rightly because of the introduction of the new code) the line of report, now at:
kernel: kernel BUG at mm/uksm.c:3326!
Also have the similar problem with uksm on a 5.2.21 kernel: kernel BUG at mm/uksm.c:3567! invalid opcode: 0000 [#1] PREEMPT SMP PTI CPU: 1 PID: 175 Comm: uksmd Tainted: G OE 5.2.21-xanmod11-custom #1 Hardware name: LENOVO 7450DE1/7450DE1, BIOS 7WET67WW (3.17 ) 12/02/2010 RIP: 0010:uksm_do_scan+0x1cfd/0x2770 Code: 01 00 00 00 00 e9 47 fc ff ff 48 c7 83 d8 00 00 00 01 00 00 00 e9 4f fd ff ff 48 c7 83 d8 00 00 00 01 00 00 00 e9 5c fe ff ff <0f> 0b 0f 0b 8b 93 f4 00 00 00 85 d2 0f 84 c9 02 00 00 48 63 83 f0 RSP: 0018:ffffb8430087be40 EFLAGS: 00010282 RAX: 00000000fffffff4 RBX: ffffb8430087be78 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000012dc0 RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000ffffffff R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000079 R13: 00000054f6997a01 R14: ffff8aec52fde0c0 R15: 0000000000000004 FS: 0000000000000000(0000) GS:ffff8aed77a80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb5ec4a2000 CR3: 00000001302d6000 CR4: 00000000000406e0 Call Trace: uksm_scan_thread+0x141/0x180 kthread+0xf9/0x130 ? uksm_do_scan+0x2770/0x2770 ? kthread_park+0x80/0x80 ret_from_fork+0x35/0x40
This is still present in 5.4.5.
[Mar 8 17:07] ------------[ cut here ]------------
[ +0.000005] kernel BUG at mm/uksm.c:3328!
[ +0.000010] invalid opcode: 0000 [#1] SMP PTI
[ +0.000005] CPU: 3 PID: 144 Comm: uksmd Tainted: G OE 5.4.5-mc0-easy #1
[ +0.000002] Hardware name: LENOVO 20EFCTO1WW/20EFCTO1WW, BIOS GNET83WW (2.31 ) 05/03/2017
[ +0.000009] RIP: 0010:scan_vma_one_page+0xaca/0x1470
[ +0.000005] Code: dc 80 00 4c 89 e8 48 2b 05 03 89 05 01 81 e3 f8 0f 00 00 48 c1 f8 06 48 c1 e0 0c 48 03 05 fe 88 05 01 48 01 c3 e9 c5 fe ff ff <0f> 0b 0f 0b 0f 0b 48 8b 4b 70 48 8b 45 b8 48 c1 e0 0c 48 03 01 48
[ +0.000003] RSP: 0018:ffffc2b380b2fd90 EFLAGS: 00010286
[ +0.000003] RAX: 0000000000000000 RBX: ffff9d9d64ab5540 RCX: ffff9d9cd74e1a50
[ +0.000002] RDX: 0000000000000007 RSI: 0000000000000401 RDI: ffff9d9c8407bba0
[ +0.000002] RBP: ffffc2b380b2fe00 R08: 00000000f5bbee78 R09: 0000000210038000
[ +0.000003] R10: ffff9d9cef4a80a0 R11: 00007efd7b08d000 R12: ffff9d9cc9c4f820
[ +0.000002] R13: 0000000000000528 R14: 0000000000000b04 R15: 0000000000000005
[ +0.000003] FS: 0000000000000000(0000) GS:ffff9d9db60c0000(0000) knlGS:0000000000000000
[ +0.000002] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ +0.000002] CR2: 000017bf5c29ee20 CR3: 000000024a084003 CR4: 00000000001606e0
[ +0.000002] Call Trace:
[ +0.000008] uksm_do_scan+0x145/0x2b00
[ +0.000009] ? schedule_timeout+0x14a/0x290
[ +0.000005] uksm_scan_thread+0x173/0x1b0
[ +0.000005] ? __kthread_parkme+0x4c/0x70
[ +0.000004] kthread+0x116/0x130
[ +0.000004] ? uksm_do_scan+0x2b00/0x2b00
[ +0.000004] ? kthread_park+0x80/0x80
[ +0.000006] ret_from_fork+0x35/0x40
[ +0.000003] Modules linked in: acpi_call(OE) ctr(E) ccm(E) 8021q(E) garp(E) stp(E) mrp(E) llc(E) snd_hda_codec_hdmi(E) binfmt_misc(E) wmi_bmof(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) crc32c_intel(E) ghash_clmulni_intel(E) aesni_intel(E) glue_helper(E) crypto_simd(E) cryptd(E) kvm_intel(E) input_leds(E) iwlmvm(E) joydev(E) mousedev(E) i2c_i801(E) mac80211(E) i915(E) libarc4(E) iwlwifi(E) sdhci_pci(E) cec(E) cqhci(E) drm_kms_helper(E) sdhci(E) snd_hda_codec_realtek(E) cfg80211(E) drm(E) snd_hda_codec_generic(E) mmc_core(E) e1000e(E) ptp(E) mei_me(E) mei(E) pps_core(E) wmi(E) snd_hda_intel(E) snd_intel_nhlt(E) tpm_tis(E) snd_hda_codec(E) bbswitch(OE) snd_hda_core(E) intel_gtt(E) thinkpad_acpi(E) evdev(E) agpgart(E) snd_pcm(E) i2c_algo_bit(E) fb_sys_fops(E) syscopyarea(E) ie31200_edac(E) sysfillrect(E) sysimgblt(E) i2c_core(E) mac_hid(E) snd_timer(E) tpm_tis_core(E) edac_core(E) nvram(E) ledtrig_audio(E) snd(E) soundcore(E) rfkill(E) tpm(E) led_class(E) rng_core(E) video(E)
[ +0.000052] efivarfs(E)
[ +0.000007] ---[ end trace 5f88f476a84b3bfc ]---
[ +0.000006] RIP: 0010:scan_vma_one_page+0xaca/0x1470
[ +0.000003] Code: dc 80 00 4c 89 e8 48 2b 05 03 89 05 01 81 e3 f8 0f 00 00 48 c1 f8 06 48 c1 e0 0c 48 03 05 fe 88 05 01 48 01 c3 e9 c5 fe ff ff <0f> 0b 0f 0b 0f 0b 48 8b 4b 70 48 8b 45 b8 48 c1 e0 0c 48 03 01 48
[ +0.000002] RSP: 0018:ffffc2b380b2fd90 EFLAGS: 00010286
[ +0.000003] RAX: 0000000000000000 RBX: ffff9d9d64ab5540 RCX: ffff9d9cd74e1a50
[ +0.000002] RDX: 0000000000000007 RSI: 0000000000000401 RDI: ffff9d9c8407bba0
[ +0.000002] RBP: ffffc2b380b2fe00 R08: 00000000f5bbee78 R09: 0000000210038000
[ +0.000002] R10: ffff9d9cef4a80a0 R11: 00007efd7b08d000 R12: ffff9d9cc9c4f820
[ +0.000001] R13: 0000000000000528 R14: 0000000000000b04 R15: 0000000000000005
[ +0.000003] FS: 0000000000000000(0000) GS:ffff9d9db60c0000(0000) knlGS:0000000000000000
[ +0.000002] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ +0.000002] CR2: 000017bf5c29ee20 CR3: 000000024a084003 CR4: 00000000001606e0
I've got two of them in a row while taking part in a webinar on zoom.us with Firefox nightly and some of my processes including firefox and htop freezes.
------------[ cut here ]------------
kernel BUG at mm/uksm.c:3328!
invalid opcode: 0000 [#1] SMP PTI
CPU: 1 PID: 196 Comm: uksmd Tainted: P OE 5.4.42-1-lily #4
Hardware name: LENOVO 20J6A01ACD/20J6A01ACD, BIOS R0FET51W (1.31 ) 01/07/2020
RIP: 0010:scan_vma_one_page+0xa13/0x2260
Code: 48 8b 73 58 49 39 c7 0f 82 0b ff ff ff 0f 0b 48 8b 53 70 4c 89 f0 48 c1 e0 0c 48 03 02 48 83 c8 01 49 89 04 24 e9 19 fa ff ff <0f> 0b 49 8b 57 08 48 8d 42 ff 83 e2 01 49 0f 44 c7 48 8b 40 18 83
RSP: 0018:ffffa483c03cbd70 EFLAGS: 00010293
RAX: 278658453a717c59 RBX: ffff9022d1a1f840 RCX: 0000000000000649
RDX: ffff9024874e3248 RSI: 000000000000046b RDI: ffff9022e9ead0c8
RBP: ffff90241d45e358 R08: 278658453a717c59 R09: 278658453a717c58
R10: 00000000001b0971 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000002 R14: 0000000000000649 R15: 0000000000000003
FS: 0000000000000000(0000) GS:ffff9026c2440000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc513175800 CR3: 000000022900a001 CR4: 00000000003606e0
Call Trace:
? slot_tree_node_extend+0x10/0x10
? sradix_tree_enter+0x21a/0x390
uksm_do_scan+0x149/0x24d0
? schedule_timeout+0x91/0x160
? uksm_do_scan+0x24d0/0x24d0
uksm_scan_thread+0x141/0x180
? uksm_do_scan+0x24d0/0x24d0
kthread+0x117/0x130
? __kthread_bind_mask+0x60/0x60
ret_from_fork+0x35/0x40
Modules linked in: tcp_diag(E) udp_diag(E) inet_diag(E) netlink_diag(E) 8021q(E) garp(E) mrp(E) rndis_host(E) cdc_ether(E) usbnet(E) mii(E) xt_REDIRECT(E) nvidia_uvm(OE) fuse(E) uas(E) usb_storage(E) xt_comment(E) uinput(E) tun(E) nfnetlink_queue(E) nfnetlink_log(E) sctp(E) ip6t_REJECT(E) nf_reject_ipv6(E) xt_set(E) ip6table_filter(E) ip6_tables(E) xfrm_user(E) xfrm_algo(E) veth(E) xt_nat(E) wireguard(E) ip6_udp_tunnel(E) udp_tunnel(E) iptable_mangle(E) xt_TPROXY(E) nf_tproxy_ipv6(E) nf_tproxy_ipv4(E) xt_mark(E) ccm(E) rfcomm(E) iptable_filter(E) xt_hl(E) iptable_nat(E) xt_MASQUERADE(E) nf_nat(E) nf_conntrack(E) nf_defrag_ipv6(E) nf_defrag_ipv4(E) bridge(E) stp(E) llc(E) xfs(E) xt_NFQUEUE(E) xt_tcpudp(E) cmac(E) algif_hash(E) algif_skcipher(E) af_alg(E) bnep(E) ip_set_hash_net(E) ip_set_hash_ip(E) ip_set(E) nfnetlink(E) intel_rapl_msr(E) intel_rapl_common(E) nvidia_drm(POE) iTCO_wdt(E) iTCO_vendor_support(E) mei_hdcp(E) wmi_bmof(E) intel_wmi_thunderbolt(E) nvidia_modeset(POE)
nvidia(POE) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) iwlmvm(E) intel_cstate(E) snd_hda_codec_hdmi(E) intel_uncore(E) intel_rapl_perf(E) snd_hda_codec_realtek(E) mac80211(E) snd_hda_codec_generic(E) psmouse(E) libarc4(E) snd_hda_intel(E) pcspkr(E) snd_intel_nhlt(E) snd_hda_codec(E) uvcvideo(E) iwlwifi(E) snd_hda_core(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_v4l2(E) snd_hwdep(E) btusb(E) videobuf2_common(E) snd_pcm(E) nls_iso8859_1(E) btrtl(E) e1000e(E) nls_cp437(E) btbcm(E) videodev(E) vfat(E) btintel(E) rtsx_pci_ms(E) i2c_i801(E) fat(E) snd_timer(E) cfg80211(E) memstick(E) bluetooth(E) mc(E) ecdh_generic(E) ecc(E) thinkpad_acpi(E) crc16(E) mei_me(E) joydev(E) ipmi_devintf(E) input_leds(E) mousedev(E) mei(E) ipmi_msghandler(E) intel_pch_thermal(E) nvram(E) tpm_crb(E) wmi(E) ledtrig_audio(E) rfkill(E) snd(E) soundcore(E) tpm_tis(E) battery(E) tpm_tis_core(E) ac(E) tpm(E) rng_core(E) evdev(E) mac_hid(E) i2c_dev(E) overlay(E) vboxnetadp(OE)
vboxnetflt(OE) vboxdrv(OE) nfsd(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) loop(E) crypto_user(E) ip_tables(E) x_tables(E) btrfs(E) libcrc32c(E) crc32c_generic(E) xor(E) raid6_pq(E) dm_crypt(E) dm_mod(E) hid_logitech_hidpp(E) hid_logitech_dj(E) hid_generic(E) usbhid(E) hid(E) sd_mod(E) crct10dif_pclmul(E) crc32_pclmul(E) crc32c_intel(E) ghash_clmulni_intel(E) rtsx_pci_sdmmc(E) serio_raw(E) mmc_core(E) atkbd(E) libps2(E) ahci(E) libahci(E) aesni_intel(E) crypto_simd(E) libata(E) cryptd(E) glue_helper(E) xhci_pci(E) rtsx_pci(E) scsi_mod(E) xhci_hcd(E) i8042(E) serio(E) kvmgt(E) vfio_mdev(E) mdev(E) vfio_iommu_type1(E) vfio(E) kvm(E) irqbypass(E) i915(E) intel_gtt(E) i2c_algo_bit(E) drm_kms_helper(E) syscopyarea(E) sysfillrect(E) sysimgblt(E) fb_sys_fops(E) drm(E) agpgart(E)
---[ end trace 2023cbb40d5c0f0d ]---
RIP: 0010:scan_vma_one_page+0xa13/0x2260
Code: 48 8b 73 58 49 39 c7 0f 82 0b ff ff ff 0f 0b 48 8b 53 70 4c 89 f0 48 c1 e0 0c 48 03 02 48 83 c8 01 49 89 04 24 e9 19 fa ff ff <0f> 0b 49 8b 57 08 48 8d 42 ff 83 e2 01 49 0f 44 c7 48 8b 40 18 83
RSP: 0018:ffffa483c03cbd70 EFLAGS: 00010293
RAX: 278658453a717c59 RBX: ffff9022d1a1f840 RCX: 0000000000000649
RDX: ffff9024874e3248 RSI: 000000000000046b RDI: ffff9022e9ead0c8
RBP: ffff90241d45e358 R08: 278658453a717c59 R09: 278658453a717c58
R10: 00000000001b0971 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000002 R14: 0000000000000649 R15: 0000000000000003
FS: 0000000000000000(0000) GS:ffff9026c2440000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc513175800 CR3: 000000022900a001 CR4: 00000000003606e0
------------[ cut here ]------------
kernel BUG at mm/uksm.c:3328!
invalid opcode: 0000 [#1] SMP PTI
CPU: 4 PID: 196 Comm: uksmd Tainted: P OE 5.4.42-1-lily #4
Hardware name: LENOVO 20J6A01ACD/20J6A01ACD, BIOS R0FET51W (1.31 ) 01/07/2020
RIP: 0010:scan_vma_one_page+0xa13/0x2260
Code: 48 8b 73 58 49 39 c7 0f 82 0b ff ff ff 0f 0b 48 8b 53 70 4c 89 f0 48 c1 e0 0c 48 03 02 48 83 c8 01 49 89 04 24 e9 19 fa ff ff <0f> 0b 49 8b 57 08 48 8d 42 ff 83 e2 01 49 0f 44 c7 48 8b 40 18 83
RSP: 0018:ffff969a403e3d70 EFLAGS: 00010202
RAX: ffff91c9ccc55690 RBX: ffff91cab3ec8540 RCX: 0000000000000b87
RDX: ffff91c9d41f0c38 RSI: 000000000000094b RDI: ffff91cb441703e8
RBP: ffff91c9efc67a58 R08: ffff91c9b9a46fa0 R09: 00007fc60c84c000
R10: 00006e36465b905f R11: ffff91c9ccc55690 R12: ffff91c9ccc55690
R13: 0000000000000004 R14: 0000000000000b87 R15: 0000000000000005
FS: 0000000000000000(0000) GS:ffff91ccc2500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002d735ba112a0 CR3: 000000041a60a006 CR4: 00000000003606e0
Call Trace:
? sradix_tree_next+0xca/0x150
uksm_do_scan+0x149/0x24d0
? schedule_timeout+0x91/0x160
? uksm_do_scan+0x24d0/0x24d0
uksm_scan_thread+0x141/0x180
? uksm_do_scan+0x24d0/0x24d0
kthread+0x117/0x130
? __kthread_bind_mask+0x60/0x60
ret_from_fork+0x35/0x40
Modules linked in: nfnetlink_queue(E) nfnetlink_log(E) sctp(E) ip6t_REJECT(E) nf_reject_ipv6(E) xt_set(E) ip6table_filter(E) ip6_tables(E) xfrm_user(E) xfrm_algo(E) veth(E) rfcomm(E) xt_nat(E) wireguard(E) iptable_mangle(E) ip6_udp_tunnel(E) udp_tunnel(E) xt_TPROXY(E) nf_tproxy_ipv6(E) nf_tproxy_ipv4(E) xt_mark(E) iptable_filter(E) xt_hl(E) iptable_nat(E) xt_MASQUERADE(E) nf_nat(E) nf_conntrack(E) nf_defrag_ipv6(E) nf_defrag_ipv4(E) bridge(E) stp(E) llc(E) ccm(E) xfs(E) xt_NFQUEUE(E) xt_tcpudp(E) cmac(E) ip_set_hash_net(E) algif_hash(E) ip_set_hash_ip(E) algif_skcipher(E) ip_set(E) af_alg(E) bnep(E) nfnetlink(E) intel_rapl_msr(E) iTCO_wdt(E) iTCO_vendor_support(E) mei_hdcp(E) wmi_bmof(E) intel_wmi_thunderbolt(E) nvidia_drm(POE) intel_rapl_common(E) nvidia_modeset(POE) nvidia(POE) x86_pkg_temp_thermal(E) intel_powerclamp(E) snd_hda_codec_hdmi(E) coretemp(E) iwlmvm(E) kvm_intel(E) mac80211(E) intel_cstate(E) intel_uncore(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E)
libarc4(E) intel_rapl_perf(E) snd_hda_intel(E) iwlwifi(E) snd_intel_nhlt(E) snd_hda_codec(E) nls_iso8859_1(E) snd_hda_core(E) nls_cp437(E) snd_hwdep(E) psmouse(E) pcspkr(E) snd_pcm(E) btusb(E) btrtl(E) vfat(E) btbcm(E) btintel(E) e1000e(E) fat(E) snd_timer(E) i2c_i801(E) cfg80211(E) uvcvideo(E) bluetooth(E) rtsx_pci_ms(E) videobuf2_vmalloc(E) memstick(E) videobuf2_memops(E) videobuf2_v4l2(E) videobuf2_common(E) videodev(E) mc(E) mei_me(E) ecdh_generic(E) ecc(E) crc16(E) mei(E) intel_pch_thermal(E) ipmi_devintf(E) input_leds(E) joydev(E) mousedev(E) ipmi_msghandler(E) wmi(E) thinkpad_acpi(E) tpm_crb(E) nvram(E) ledtrig_audio(E) rfkill(E) snd(E) soundcore(E) battery(E) ac(E) tpm_tis(E) tpm_tis_core(E) tpm(E) rng_core(E) evdev(E) mac_hid(E) i2c_dev(E) overlay(E) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) nfsd(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) loop(E) crypto_user(E) ip_tables(E) x_tables(E) btrfs(E) libcrc32c(E) crc32c_generic(E) xor(E) raid6_pq(E)
dm_crypt(E) dm_mod(E) hid_logitech_hidpp(E) hid_logitech_dj(E) hid_generic(E) usbhid(E) hid(E) sd_mod(E) crct10dif_pclmul(E) crc32_pclmul(E) crc32c_intel(E) ghash_clmulni_intel(E) rtsx_pci_sdmmc(E) mmc_core(E) serio_raw(E) atkbd(E) libps2(E) aesni_intel(E) crypto_simd(E) ahci(E) libahci(E) cryptd(E) glue_helper(E) libata(E) xhci_pci(E) rtsx_pci(E) scsi_mod(E) xhci_hcd(E) i8042(E) serio(E) kvmgt(E) vfio_mdev(E) mdev(E) vfio_iommu_type1(E) vfio(E) kvm(E) irqbypass(E) i915(E) intel_gtt(E) i2c_algo_bit(E) drm_kms_helper(E) syscopyarea(E) sysfillrect(E) sysimgblt(E) fb_sys_fops(E) drm(E) agpgart(E)
---[ end trace 20db88eac86fcbdc ]---
RIP: 0010:scan_vma_one_page+0xa13/0x2260
Code: 48 8b 73 58 49 39 c7 0f 82 0b ff ff ff 0f 0b 48 8b 53 70 4c 89 f0 48 c1 e0 0c 48 03 02 48 83 c8 01 49 89 04 24 e9 19 fa ff ff <0f> 0b 49 8b 57 08 48 8d 42 ff 83 e2 01 49 0f 44 c7 48 8b 40 18 83
RSP: 0018:ffff969a403e3d70 EFLAGS: 00010202
RAX: ffff91c9ccc55690 RBX: ffff91cab3ec8540 RCX: 0000000000000b87
RDX: ffff91c9d41f0c38 RSI: 000000000000094b RDI: ffff91cb441703e8
RBP: ffff91c9efc67a58 R08: ffff91c9b9a46fa0 R09: 00007fc60c84c000
R10: 00006e36465b905f R11: ffff91c9ccc55690 R12: ffff91c9ccc55690
R13: 0000000000000004 R14: 0000000000000b87 R15: 0000000000000005
FS: 0000000000000000(0000) GS:ffff91ccc2500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002d735ba112a0 CR3: 000000041a60a006 CR4: 00000000003606e0
