This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1800509
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: bionic
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https://bugs.launchpad.net/bugs/1800509
Title:
unable to handle kernel NULL pointer dereference at 0000000000000007
Status in linux package in Ubuntu:
Incomplete
Bug description:
```Oct 29 13:51:25 vs09 kernel: [201179.645520] BUG: unable to handle kernel
NULL pointer dereference at 0000000000000007
Oct 29 13:51:25 vs09 kernel: [201179.645601] IP: split_swap_cluster+0x4f/0x70
Oct 29 13:51:25 vs09 kernel: [201179.645633] PGD 0 P4D 0
Oct 29 13:51:25 vs09 kernel: [201179.645660] Oops: 0002 [#1] SMP PTI
Oct 29 13:51:25 vs09 kernel: [201179.645689] Modules linked in: vhost_net
vhost tap xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4
iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack
nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp ebtable_filter ebtables
ip6table_filter ip6_tables iptable_filter ip_tables x_tables rpcsec_gss_krb5
auth_rpcgss nfsv4 nfs lockd grace fscache intel_rapl sb_edac
x86_pkg_temp_thermal intel_powerclamp coretemp intel_cstate ipmi_ssif joydev
input_leds intel_rapl_perf bridge stp llc mei_me lpc_ich mei ioatdma shpchp
ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter acpi_pad mac_hid
kvm_intel kvm irqbypass ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp
libiscsi_tcp libiscsi scsi_transport_iscsi sunrpc autofs4 btrfs zstd_compress
raid10 raid456 async_raid6_recov
Oct 29 13:51:25 vs09 kernel: [201179.646180] async_memcpy async_pq async_xor
async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear ast
crct10dif_pclmul hid_generic crc32_pclmul ttm ghash_clmulni_intel pcbc
drm_kms_helper usbhid syscopyarea igb sysfillrect aesni_intel sysimgblt dca
aes_x86_64 crypto_simd fb_sys_fops glue_helper i2c_algo_bit ahci ptp drm
mxm_wmi hid cryptd libahci pps_core wmi
Oct 29 13:51:25 vs09 kernel: [201179.646418] CPU: 15 PID: 4321 Comm:
qemu-system-x86 Not tainted 4.15.0-38-generic #41~16.04.1-Ubuntu
Oct 29 13:51:25 vs09 kernel: [201179.646478] Hardware name: Supermicro
SYS-6028R-TR/X10DRi, BIOS 2.1 09/13/2016
Oct 29 13:51:25 vs09 kernel: [201179.646531] RIP:
0010:split_swap_cluster+0x4f/0x70
Oct 29 13:51:25 vs09 kernel: [201179.646567] RSP: 0018:ffffa9c9f77e3398
EFLAGS: 00010246
Oct 29 13:51:25 vs09 kernel: [201179.646606] RAX: 0000000000000000 RBX:
0000000000064566 RCX: 0000000000064566
Oct 29 13:51:25 vs09 kernel: [201179.646655] RDX: ffffa9c9a0001000 RSI:
0000000005cc5fff RDI: 0000000000064566
Oct 29 13:51:25 vs09 kernel: [201179.646703] RBP: ffffa9c9f77e33a0 R08:
0000000000000001 R09: ffff9140bffd4d00
Oct 29 13:51:25 vs09 kernel: [201179.646752] R10: ffff9140bffd4000 R11:
0000000000000001 R12: ffffe5fdb3178000
Oct 29 13:51:25 vs09 kernel: [201179.646800] R13: ffffe5fdb3178080 R14:
ffffe5fdb3180000 R15: ffffe5fdb3178040
Oct 29 13:51:25 vs09 kernel: [201179.646850] FS: 00007fb2a27fc700(0000)
GS:ffff913fbee40000(0000) knlGS:0000000000000000
Oct 29 13:51:25 vs09 kernel: [201179.646905] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Oct 29 13:51:25 vs09 kernel: [201179.646946] CR2: 0000000000000007 CR3:
0000003f691b4006 CR4: 00000000003626e0
Oct 29 13:51:25 vs09 kernel: [201179.646995] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Oct 29 13:51:25 vs09 kernel: [201179.647043] DR3: 0000000000000000 DR6:
00000000fffe0ff0 DR7: 0000000000000400
Oct 29 13:51:25 vs09 kernel: [201179.647091] Call Trace:
Oct 29 13:51:25 vs09 kernel: [201179.647119]
split_huge_page_to_list+0x76e/0x7f0
Oct 29 13:51:25 vs09 kernel: [201179.647156] deferred_split_scan+0x177/0x2d0
Oct 29 13:51:25 vs09 kernel: [201179.647191] shrink_slab.part.50+0x20b/0x440
Oct 29 13:51:25 vs09 kernel: [201179.647226] shrink_node+0x2fc/0x310
Oct 29 13:51:25 vs09 kernel: [201179.647257] do_try_to_free_pages+0xee/0x360
Oct 29 13:51:25 vs09 kernel: [201179.647290] try_to_free_pages+0xf1/0x1c0
Oct 29 13:51:25 vs09 kernel: [201179.647324]
__alloc_pages_slowpath+0x405/0xec0
Oct 29 13:51:25 vs09 kernel: [201179.647362]
__alloc_pages_nodemask+0x265/0x280
Oct 29 13:51:25 vs09 kernel: [201179.647399] alloc_pages_vma+0x165/0x1e0
Oct 29 13:51:25 vs09 kernel: [201179.647431]
do_huge_pmd_anonymous_page+0x167/0x710
Oct 29 13:51:25 vs09 kernel: [201179.647469] __handle_mm_fault+0xb1d/0x11e0
Oct 29 13:51:25 vs09 kernel: [201179.647504] handle_mm_fault+0xcc/0x1c0
Oct 29 13:51:25 vs09 kernel: [201179.647535] __get_user_pages+0x11d/0x6d0
Oct 29 13:51:25 vs09 kernel: [201179.647568] get_user_pages+0x42/0x50
Oct 29 13:51:25 vs09 kernel: [201179.647627]
__gfn_to_pfn_memslot+0x18b/0x3b0 [kvm]
Oct 29 13:51:25 vs09 kernel: [201179.647691] try_async_pf+0x66/0x220 [kvm]
Oct 29 13:51:25 vs09 kernel: [201179.649238] tdp_page_fault+0x12d/0x290 [kvm]
Oct 29 13:51:25 vs09 kernel: [201179.650766] ? vmexit_fill_RSB+0x10/0x40
[kvm_intel]
Oct 29 13:51:25 vs09 kernel: [201179.652323] kvm_mmu_page_fault+0x62/0x170
[kvm]
Oct 29 13:51:25 vs09 kernel: [201179.653835] handle_ept_violation+0xae/0x140
[kvm_intel]
Oct 29 13:51:25 vs09 kernel: [201179.655337] vmx_handle_exit+0xb3/0xcd0
[kvm_intel]
Oct 29 13:51:25 vs09 kernel: [201179.656844] ? vmx_vcpu_run+0x418/0x5e0
[kvm_intel]
Oct 29 13:51:25 vs09 kernel: [201179.658374] vcpu_enter_guest+0x451/0x1270
[kvm]
Oct 29 13:51:25 vs09 kernel: [201179.659869]
kvm_arch_vcpu_ioctl_run+0x270/0x3d0 [kvm]
Oct 29 13:51:25 vs09 kernel: [201179.661323] ?
kvm_arch_vcpu_ioctl_run+0x270/0x3d0 [kvm]
Oct 29 13:51:25 vs09 kernel: [201179.662743] kvm_vcpu_ioctl+0x33a/0x610 [kvm]
Oct 29 13:51:25 vs09 kernel: [201179.664105] do_vfs_ioctl+0xa4/0x600
Oct 29 13:51:25 vs09 kernel: [201179.665415] ? _cond_resched+0x1a/0x50
Oct 29 13:51:25 vs09 kernel: [201179.666679] SyS_ioctl+0x79/0x90
Oct 29 13:51:25 vs09 kernel: [201179.667893] ?
exit_to_usermode_loop+0xa5/0xd0
Oct 29 13:51:25 vs09 kernel: [201179.669072] do_syscall_64+0x73/0x130
Oct 29 13:51:25 vs09 kernel: [201179.670201]
entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Oct 29 13:51:25 vs09 kernel: [201179.671298] RIP: 0033:0x7fb36a80bf47
Oct 29 13:51:25 vs09 kernel: [201179.672350] RSP: 002b:00007fb2a27fb978
EFLAGS: 00000246 ORIG_RAX: 0000000000000010
Oct 29 13:51:25 vs09 kernel: [201179.673419] RAX: ffffffffffffffda RBX:
00007fb36fa46001 RCX: 00007fb36a80bf47
Oct 29 13:51:25 vs09 kernel: [201179.674484] RDX: 0000000000000000 RSI:
000000000000ae80 RDI: 0000000000000049
Oct 29 13:51:25 vs09 kernel: [201179.675555] RBP: 0000000000000001 R08:
00005610fcebe8f0 R09: 0000000000000001
Oct 29 13:51:25 vs09 kernel: [201179.676609] R10: 0000000000000000 R11:
0000000000000246 R12: 0000000000000000
Oct 29 13:51:25 vs09 kernel: [201179.677662] R13: 00005610fcea8f80 R14:
00007fb36fa45000 R15: 00005610ffbb3c40
Oct 29 13:51:25 vs09 kernel: [201179.678718] Code: c1 e3 07 48 c1 eb 10 48 8d
1c d8 48 89 df e8 d9 68 77 00 80 63 07 fb 48 85 db 74 17 48 89 df c6 07 00 0f
1f 40 00 31 c0 5b 5d c3 <80> 24 25 07 00 00 00 fb 31 c0 5b 5d c3 b8 f0 ff ff ff
eb e9 0f
Oct 29 13:51:25 vs09 kernel: [201179.681026] RIP:
split_swap_cluster+0x4f/0x70 RSP: ffffa9c9f77e3398
Oct 29 13:51:25 vs09 kernel: [201179.682157] CR2: 0000000000000007
Oct 29 13:51:25 vs09 kernel: [201179.683269] ---[ end trace 79264fc2c2b01079
]---
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