Kernel panic accessing page_private data during writeback

Issue

• Kernel BUG during writeback in Ext4

kernel BUG at fs/ext4/inode.c:2297!
invalid opcode: 0000 [#1] SMP
Modules linked in: vfat fat uas usb_storage ipheth binfmt_misc tcp_lp ext4 mbcache jbd2 xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun vmnet(OE) fuse vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter hp_wmi iTCO_wdt sparse_keymap gpio_ich iTCO_vendor_support ppdev rfkill intel_powerclamp coretemp kvm_intel kvm irqbypass snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel pcspkr snd_hda_codec sg snd_hda_core snd_hwdep lpc_ich snd_seq snd_seq_device snd_pcm parport_pc parport wmi snd_timer snd shpchp i7core_edac soundcore edac_core acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c firewire_sbp2 raid1 sd_mod crc_t10dif crct10dif_generic sr_mod cdrom crct10dif_common amdkfd amd_iommu_v2 radeon i2c_algo_bit drm_kms_helper crc32c_intel syscopyarea ahci sysfillrect serio_raw sysimgblt libahci fb_sys_fops ttm firewire_ohci libata tg3 firewire_core drm crc_itu_t ptp pps_core i2c_core floppy fjes dm_mirror dm_region_hash dm_log dm_mod 
CPU: 0 PID: 19179 Comm: kworker/u32:2 Tainted: G          IOE  ------------   3.10.0-514.2.2.el7.x86_64 #1
Hardware name: Hewlett-Packard HP Z400 Workstation/0B4Ch, BIOS 786G3 v03.12 09/13/2010
Workqueue: writeback bdi_writeback_workfn (flush-8:32)
task: ffff8805e2668000 ti: ffff8800a07b0000 task.ti: ffff8800a07b0000
RIP: 0010:[<ffffffffa0a0d365>]  [<ffffffffa0a0d365>] mpage_prepare_extent_to_map+0x2d5/0x2e0 [ext4]
RSP: 0018:ffff8800a07b39a0  EFLAGS: 00010246
RAX: 002fffff0000003d RBX: ffff8800a07b3a28 RCX: 00000000000f6280
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88062ff88ce8
RBP: ffff8800a07b3a78 R08: 0000000000000000 R09: 0000000000000000
R10: 57ffaf0c11bcff40 R11: 0000000000000008 R12: 0000000000005006
R13: 0000000000270d37 R14: ffffea0007dcdc00 R15: ffff8800a07b3b20
FS:  0000000000000000(0000) GS:ffff880617200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00007f9c0044dd5d CR3: 00000000019ba000 CR4: 00000000000007f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Stack:
 ffff8800a07b39e0 0000000000000000 ffff8804cb0e1648 ffff8800a07b3a48
 00000000000f63d7 000000000000000e 0000000000000000 ffffea0011b9b000
 ffffea00087bdd40 ffffea000d9ec980 ffffea0014dd0ac0 ffffea00022f4940
Call Trace:
 [<ffffffffa0a1187b>] ext4_writepages+0x45b/0xd60 [ext4]
 [<ffffffff8118d3ae>] do_writepages+0x1e/0x40
 [<ffffffff81228890>] __writeback_single_inode+0x40/0x210
 [<ffffffff8122957e>] writeback_sb_inodes+0x25e/0x420
 [<ffffffff812297df>] __writeback_inodes_wb+0x9f/0xd0
 [<ffffffff8122a023>] wb_writeback+0x263/0x2f0
 [<ffffffff812188ec>] ? get_nr_inodes+0x4c/0x70
 [<ffffffff8122c01b>] bdi_writeback_workfn+0x2cb/0x460
 [<ffffffff810a805b>] process_one_work+0x17b/0x470
 [<ffffffff810a8e96>] worker_thread+0x126/0x410
 [<ffffffff810a8d70>] ? rescuer_thread+0x460/0x460
 [<ffffffff810b064f>] kthread+0xcf/0xe0
 [<ffffffff810b0580>] ? kthread_create_on_node+0x140/0x140
 [<ffffffff81696618>] ret_from_fork+0x58/0x90
 [<ffffffff810b0580>] ? kthread_create_on_node+0x140/0x140
Code: ff ff ff e8 1e 29 78 e0 8b 85 40 ff ff ff eb c2 48 8d bd 50 ff ff ff e8 0a 29 78 e0 eb 8c 4c 89 f7 e8 c0 2c 77 e0 e9 d5 fe ff ff <0f> 0b 0f 0b e8 72 83 67 e0 66 90 66 66 66 66 90 55 48 89 e5 41
RIP  [<ffffffffa0a0d365>] mpage_prepare_extent_to_map+0x2d5/0x2e0 [ext4]
 RSP <ffff8800a07b39a0>

• Kernel BUG during writeback in XFS

kernel BUG at fs/xfs/xfs_aops.c:809!
invalid opcode: 0000 [#1] SMP  
Modules linked in: uas snd_usb_audio usb_storage snd_usbmidi_lib snd_rawmidi macsec vsock_diag tcp_diag udp_diag inet_diag unix_diag af_packet_diag netlink_diag tun drbg ansi_cprng ccm nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache tcp_lp rfcomm cmac vmnet(OE) ppdev parport_pc parport fuse vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) bnep sunrpc dell_rbtn hid_alps iTCO_wdt iTCO_vendor_support dell_laptop arc4 mei_wdt dell_wmi dell_smbios intel_wmi_thunderbolt dell_wmi_descriptor dcdbas iwlmvm vfat fat snd_hda_codec_hdmi mac80211 intel_pmc_core intel_powerclamp coretemp intel_rapl kvm_intel snd_soc_skl dell_led kvm snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_dsp snd_soc_sst_ipc snd_soc_acpi snd_soc_core snd_compress irqbypass snd_hda_codec_realtek snd_hda_codec_generic iwlwifi crc32_pclmul snd_hda_intel snd_hda_codec ghash_clmulni_intel snd_hda_core snd_hwdep snd_seq aesni_intel lrw snd_seq_device gf128mul glue_helper ablk_helper cryptd snd_pcm btusb pcspkr btrtl btbcm cfg80211 btintel bluetooth snd_timer uvcvideo videobuf2_vmalloc snd i2c_i801 soundcore videobuf2_memops videobuf2_core videodev sg qcserial rtsx_pci_ms usb_wwan memstick mei_me joydev mei rfkill i2c_designware_platform idma64 i2c_designware_core virt_dma wmi pinctrl_sunrisepoint pinctrl_intel intel_hid acpi_pad sparse_keymap int3400_thermal binfmt_misc ip_tables xfs libc rc32c sd_mod crc_t10dif crct10dif_generic hid_multitouch cdc_mbim cdc_wdm rtsx_pci_sdmmc cdc_ncm mmc_core usbnet mii i915 i2c_algo_bit iosf_mbi drm_kms_helper crct10dif_pclmul crct10dif_common ahci syscopyarea sysfillrect sysimgblt fb_sys_fops e1000e libahci crc32c_intel drm serio_raw libata ptp pps_core rtsx_pci drm_panel_orientatio video dm_mirror dm_region_hash dm_log dm_mod
CPU: 0 PID: 20958 Comm: kworker/u8:2 Kdump: loaded Tainted: G           OE  ------------ T 3.10.0-957.21.2.el7.x86_64 #1
Hardware name: Dell Inc. Latitude 7480/00F6D3, BIOS 1.12.2 10/01/2018
Workqueue: writeback bdi_writeback_workfn (flush-253:3)
task: ffff97891f43c100 ti: ffff978c14600000 task.ti: ffff978c14600000
RIP: 0010:[<ffffffffc0707ba2>]  [<ffffffffc0707ba2>] xfs_do_writepage+0x3d2/0x510 [xfs]
RSP: 0018:ffff978c146039c0  EFLAGS: 00010246
RAX: 0000000000001000 RBX: 0000000200000000 RCX: 000000000000000c
RDX: 001fffff00000029 RSI: fffffd708123e180 RDI: 0000000109354000
RBP: ffff978c14603a30 R08: fffffffffffffff1 R09: 000000000001f6a0
R10: ffff978ebe7d9800 R11: 0000000000000000 R12: ffff978dfeb6f370
R13: ffff978dfeb6f220 R14: 0000000000000000 R15: ffff978c14603b48
FS:  0000000000000000(0000) GS:ffff978ebe400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f280131f000 CR3: 000000059e010000 CR4: 00000000003607f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 [<ffffffff863c25bc>] write_cache_pages+0x21c/0x470
 [<ffffffffc07077d0>] ? xfs_aops_discard_page+0x150/0x150 [xfs]
 [<ffffffffc07075cb>] xfs_vm_writepages+0x6b/0xa0 [xfs]
 [<ffffffff863c36d1>] do_writepages+0x21/0x50
 [<ffffffff864701b0>] __writeback_single_inode+0x40/0x260
 [<ffffffff86470c44>] writeback_sb_inodes+0x1c4/0x490
 [<ffffffff86470faf>] __writeback_inodes_wb+0x9f/0xd0
 [<ffffffff864717e3>] wb_writeback+0x263/0x2f0
 [<ffffffff8645d5fc>] ? get_nr_inodes+0x4c/0x70
 [<ffffffff8647216b>] bdi_writeback_workfn+0x2cb/0x460
 [<ffffffff862b9ebf>] process_one_work+0x17f/0x440
 [<ffffffff862baf56>] worker_thread+0x126/0x3c0
 [<ffffffff862bae30>] ? manage_workers.isra.25+0x2a0/0x2a0
 [<ffffffff862c1da1>] kthread+0xd1/0xe0
 [<ffffffff862c1cd0>] ? insert_kthread_work+0x40/0x40
 [<ffffffff86975c1d>] ret_from_fork_nospec_begin+0x7/0x21
 [<ffffffff862c1cd0>] ? insert_kthread_work+0x40/0x40
Code: df e9 e1 fc ff ff 0f 1f 00 85 c9 0f 84 5a ff ff ff eb a3 66 0f 1f 44 00 00 e8 2b f9 b8 c5 48 89 df e8 83 19 d7 c5 e9 d2 fd ff ff <0f> 0b 80 3d da e1 06 00 00 0f 85 31 ff ff ff be d0 03 00 00 48 
RIP  [<ffffffffc0707ba2>] xfs_do_writepage+0x3d2/0x510 [xfs]
 RSP <ffff978c146039c0>