RHEL9: Kernel panic due to another UAF in cifs_ses.

Issue

• Kernel panic with logs:

      KERNEL: /cores/retrace/repos/kernel/x86_64/usr/lib/debug/lib/modules/5.14.0-427.26.1.el9_4.x86_64/vmlinux  [TAINTED]
    DUMPFILE: /cores/retrace/tasks/480663029/crash/vmcore  [PARTIAL DUMP]
        CPUS: 2
        DATE: Tue Jul 23 10:53:48 AEST 2024
      UPTIME: 4 days, 01:41:11
LOAD AVERAGE: 1.53, 1.59, 1.58
       TASKS: 1836
     RELEASE: 5.14.0-427.26.1.el9_4.x86_64
     VERSION: #1 SMP PREEMPT_DYNAMIC Fri Jul 5 11:34:54 EDT 2024
     MACHINE: x86_64  (2399 Mhz)
      MEMORY: 32 GB
       PANIC: "Oops: 0000 [#1] PREEMPT SMP PTI" (check log for details)

         DMI_BIOS_VERSION: VMW71.00V.21100432.B64.2301110304
            DMI_BIOS_DATE: 01/11/2023
           DMI_SYS_VENDOR: VMware, Inc.

[351638.237329] CIFS: VFS: \\remote04 Send error in SessSetup = -11
[351638.242540] CIFS: VFS: \\remote05 __cifs_put_smb_ses: Session Logoff failure rc=-11
[351638.245081] CIFS: VFS: \\remote01 smb2_calc_signature: Could not find session
[351638.245083] CIFS: VFS: \\remote01 __cifs_put_smb_ses: Session Logoff failure rc=-2
[351638.247776] CIFS: VFS: \\remote04 Send error in SessSetup = -11
[351638.249911] ------------[ cut here ]------------
[351638.249912] WARNING: CPU: 1 PID: 217150 at fs/smb/client/connect.c:1938 __cifs_put_smb_ses+0x2dc/0x3d0 [cifs]
[351638.250081] Modules linked in: nls_utf8 cifs cifs_arc4 rdma_cm iw_cm ib_cm ib_core cifs_md4 rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs tls snd_seq_dummy snd_hrtimer snd_seq snd_timer snd_seq_device snd soundcore qrtr rfkill vsock_loopback vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock sunrpc binfmt_misc vfat fat intel_rapl_msr intel_rapl_common intel_uncore_frequency_common isst_if_mbox_msr isst_if_common nfit libnvdimm vmw_balloon rapl pcspkr vmw_vmci i2c_piix4 joydev xfs libcrc32c sr_mod cdrom ata_generic vmwgfx drm_ttm_helper ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm ata_piix sd_mod ahci t10_pi libahci sg libata crct10dif_pclmul crc32_pclmul crc32c_intel vmxnet3 ghash_clmulni_intel vmw_pvscsi serio_raw dm_mirror dm_region_hash dm_log dm_mod fuse
[351638.250147] CPU: 1 PID: 217150 Comm: kworker/1:3 Kdump: loaded Not tainted 5.14.0-427.26.1.el9_4.x86_64 #1
[351638.250150] Hardware name: VMware, Inc. VMware7,1/440BX Desktop Reference Platform, BIOS VMW71.00V.21100432.B64.2301110304 01/11/2023
[351638.250152] Workqueue: events delayed_mntput
[351638.250159] RIP: 0010:__cifs_put_smb_ses+0x2dc/0x3d0 [cifs]
[351638.250236] Code: 66 90 49 8b 47 48 4c 89 e6 89 ef 48 8b 80 e8 00 00 00 ff d0 0f 1f 00 41 89 c5 85 c0 75 5b 89 ef e8 89 f1 01 00 e9 ea fd ff ff <0f> 0b e9 81 fd ff ff 65 8b 05 02 00 19 3f 89 c0 48 0f a3 05 0c f3
[351638.250238] RSP: 0018:ffffa6b6053bfdc0 EFLAGS: 00010286
[351638.250241] RAX: 00000000ffffffff RBX: 0000000000000000 RCX: 0000000000000830
[351638.250242] RDX: 0000000000000001 RSI: 0000000000000282 RDI: ffff8df885bcb038
[351638.250244] RBP: ffff8df885bcb038 R08: 00013fd028f937b9 R09: ffff8df913008d58
[351638.250246] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8df885bcb000
[351638.250247] R13: ffff8dff9fd38900 R14: 0000000000000000 R15: 0000000000000000
[351638.250249] FS:  0000000000000000(0000) GS:ffff8dff9fd00000(0000) knlGS:0000000000000000
[351638.250261] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[351638.250263] CR2: 00007ffeb8fdff10 CR3: 00000004cfe3e006 CR4: 00000000007706e0
[351638.250277] PKRU: 55555554
[351638.250279] Call Trace:
[351638.250282]  <TASK>
[351638.250284]  ? show_trace_log_lvl+0x1c4/0x2df
[351638.250290]  ? show_trace_log_lvl+0x1c4/0x2df
[351638.250294]  ? cifs_put_tcon.part.0+0xfc/0x230 [cifs]
[351638.250363]  ? __cifs_put_smb_ses+0x2dc/0x3d0 [cifs]
[351638.250456]  ? __warn+0x81/0x110
[351638.250463]  ? __cifs_put_smb_ses+0x2dc/0x3d0 [cifs]
[351638.250532]  ? report_bug+0x10a/0x140
[351638.250538]  ? handle_bug+0x3c/0x70
[351638.250543]  ? exc_invalid_op+0x14/0x70
[351638.250545]  ? asm_exc_invalid_op+0x16/0x20
[351638.250551]  ? __cifs_put_smb_ses+0x2dc/0x3d0 [cifs]
[351638.250619]  cifs_put_tcon.part.0+0xfc/0x230 [cifs]
[351638.250688]  cifs_put_tlink+0x45/0x70 [cifs]
[351638.250755]  cifs_umount+0x50/0xa0 [cifs]
[351638.250824]  deactivate_locked_super+0x2e/0xa0
[351638.250828]  cleanup_mnt+0x100/0x160
[351638.250832]  delayed_mntput+0x28/0x40
[351638.250833]  process_one_work+0x1e2/0x3b0
[351638.250837]  ? __pfx_worker_thread+0x10/0x10
[351638.250839]  worker_thread+0x50/0x3a0
[351638.250841]  ? __pfx_worker_thread+0x10/0x10
[351638.250843]  kthread+0xdd/0x100
[351638.250846]  ? __pfx_kthread+0x10/0x10
[351638.250849]  ret_from_fork+0x29/0x50
[351638.250857]  </TASK>
[351638.250858] ---[ end trace aa2777f2c056182a ]---
[351638.250873] ------------[ cut here ]------------
[351638.250873] WARNING: CPU: 1 PID: 217150 at fs/smb/client/sess.c:87 cifs_ses_get_chan_index+0x5e/0x70 [cifs]
[351638.250968] Modules linked in: nls_utf8 cifs cifs_arc4 rdma_cm iw_cm ib_cm ib_core cifs_md4 rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs tls snd_seq_dummy snd_hrtimer snd_seq snd_timer snd_seq_device snd soundcore qrtr rfkill vsock_loopback vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock sunrpc binfmt_misc vfat fat intel_rapl_msr intel_rapl_common intel_uncore_frequency_common isst_if_mbox_msr isst_if_common nfit libnvdimm vmw_balloon rapl pcspkr vmw_vmci i2c_piix4 joydev xfs libcrc32c sr_mod cdrom ata_generic vmwgfx drm_ttm_helper ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm ata_piix sd_mod ahci t10_pi libahci sg libata crct10dif_pclmul crc32_pclmul crc32c_intel vmxnet3 ghash_clmulni_intel vmw_pvscsi serio_raw dm_mirror dm_region_hash dm_log dm_mod fuse
[351638.251022] CPU: 1 PID: 217150 Comm: kworker/1:3 Kdump: loaded Tainted: G        W         -------  ---  5.14.0-427.26.1.el9_4.x86_64 #1
[351638.251025] Hardware name: VMware, Inc. VMware7,1/440BX Desktop Reference Platform, BIOS VMW71.00V.21100432.B64.2301110304 01/11/2023
[351638.251026] Workqueue: events delayed_mntput
[351638.251029] RIP: 0010:cifs_ses_get_chan_index+0x5e/0x70 [cifs]
[351638.251107] Code: eb 44 89 c0 5b c3 cc cc cc cc 48 85 db 74 1b 48 c7 c6 70 66 f4 c0 48 c7 c7 c0 5e 01 c1 e8 ca bf f9 e8 85 c0 0f 85 e9 43 04 00 <0f> 0b 45 31 c0 5b 44 89 c0 c3 cc cc cc cc 0f 1f 40 00 90 90 90 90
[351638.251109] RSP: 0018:ffffa6b6053bfd98 EFLAGS: 00010246
[351638.251111] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000830
[351638.251112] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8df885bcb000
[351638.251113] RBP: ffff8df885bcb038 R08: 00013fd028f937b9 R09: ffff8df913008d58
[351638.251115] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8df885bcb000
[351638.251116] R13: ffff8df885bcb210 R14: 0000000000000000 R15: 0000000000000000
[351638.251117] FS:  0000000000000000(0000) GS:ffff8dff9fd00000(0000) knlGS:0000000000000000
[351638.251123] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[351638.251125] CR2: 00007ffeb8fdff10 CR3: 00000004cfe3e006 CR4: 00000000007706e0
[351638.251138] PKRU: 55555554
[351638.251139] Call Trace:
[351638.251141]  <TASK>
[351638.251142]  ? show_trace_log_lvl+0x1c4/0x2df
[351638.251145]  ? show_trace_log_lvl+0x1c4/0x2df
[351638.251148]  ? cifs_chan_clear_need_reconnect+0x10/0x70 [cifs]
[351638.251227]  ? cifs_ses_get_chan_index+0x5e/0x70 [cifs]
[351638.251304]  ? __warn+0x81/0x110
[351638.251307]  ? cifs_ses_get_chan_index+0x5e/0x70 [cifs]
[351638.251383]  ? report_bug+0x10a/0x140
[351638.251387]  ? handle_bug+0x3c/0x70
[351638.251389]  ? exc_invalid_op+0x14/0x70
[351638.251392]  ? asm_exc_invalid_op+0x16/0x20
[351638.251396]  ? cifs_ses_get_chan_index+0x5e/0x70 [cifs]
[351638.251472]  cifs_chan_clear_need_reconnect+0x10/0x70 [cifs]
[351638.251549]  __cifs_put_smb_ses+0x7f/0x3d0 [cifs]
[351638.251618]  cifs_put_tcon.part.0+0xfc/0x230 [cifs]
[351638.251686]  cifs_put_tlink+0x45/0x70 [cifs]
[351638.251753]  cifs_umount+0x50/0xa0 [cifs]
[351638.251821]  deactivate_locked_super+0x2e/0xa0
[351638.251824]  cleanup_mnt+0x100/0x160
[351638.251826]  delayed_mntput+0x28/0x40
[351638.251828]  process_one_work+0x1e2/0x3b0
[351638.251830]  ? __pfx_worker_thread+0x10/0x10
[351638.251832]  worker_thread+0x50/0x3a0
[351638.251834]  ? __pfx_worker_thread+0x10/0x10
[351638.251836]  kthread+0xdd/0x100
[351638.251838]  ? __pfx_kthread+0x10/0x10
[351638.251841]  ret_from_fork+0x29/0x50
[351638.251846]  </TASK>
[351638.251847] ---[ end trace aa2777f2c056182b ]---
[351638.251851] BUG: kernel NULL pointer dereference, address: 0000000000000000
[351638.251853] #PF: supervisor read access in kernel mode
[351638.251855] #PF: error_code(0x0000) - not-present page
[351638.251857] PGD 0 P4D 0 
[351638.251860] Oops: 0000 [#1] PREEMPT SMP PTI
[351638.251862] CPU: 1 PID: 217150 Comm: kworker/1:3 Kdump: loaded Tainted: G        W         -------  ---  5.14.0-427.26.1.el9_4.x86_64 #1
[351638.251865] Hardware name: VMware, Inc. VMware7,1/440BX Desktop Reference Platform, BIOS VMW71.00V.21100432.B64.2301110304 01/11/2023
[351638.251867] Workqueue: events delayed_mntput
[351638.251869] RIP: 0010:__list_del_entry_valid+0x2d/0x50
[351638.251875] Code: 4c 8b 47 08 48 b8 00 01 00 00 00 00 ad de 48 39 c2 0f 84 34 95 62 00 48 b8 22 01 00 00 00 00 ad de 49 39 c0 0f 84 54 95 62 00 <49> 8b 30 48 39 fe 0f 85 34 95 62 00 48 8b 52 08 48 39 f2 0f 85 19
[351638.251877] RSP: 0018:ffffa6b6053bfdb8 EFLAGS: 00010217
[351638.251879] RAX: dead000000000122 RBX: 0000000000000000 RCX: 0000000000000830
[351638.251881] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8df885bcb000
[351638.251883] RBP: ffff8df885bcb038 R08: 0000000000000000 R09: ffff8df913008d58
[351638.251885] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8df885bcb000
[351638.251886] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[351638.251888] FS:  0000000000000000(0000) GS:ffff8dff9fd00000(0000) knlGS:0000000000000000
[351638.251903] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[351638.251905] CR2: 0000000000000000 CR3: 00000004cfe3e006 CR4: 00000000007706e0
[351638.251923] PKRU: 55555554
[351638.251925] Call Trace:
[351638.251926]  <TASK>
[351638.251928]  ? show_trace_log_lvl+0x1c4/0x2df
[351638.251930]  ? show_trace_log_lvl+0x1c4/0x2df
[351638.251934]  ? __cifs_put_smb_ses+0xda/0x3d0 [cifs]
[351638.252004]  ? __die_body.cold+0x8/0xd
[351638.252006]  ? page_fault_oops+0x134/0x170
[351638.252010]  ? exc_page_fault+0x62/0x150
[351638.252013]  ? asm_exc_page_fault+0x22/0x30
[351638.252017]  ? __list_del_entry_valid+0x2d/0x50
[351638.252020]  __cifs_put_smb_ses+0xda/0x3d0 [cifs]
[351638.252088]  cifs_put_tcon.part.0+0xfc/0x230 [cifs]
[351638.252156]  cifs_put_tlink+0x45/0x70 [cifs]
[351638.252223]  cifs_umount+0x50/0xa0 [cifs]
[351638.252291]  deactivate_locked_super+0x2e/0xa0
[351638.252294]  cleanup_mnt+0x100/0x160
[351638.252297]  delayed_mntput+0x28/0x40
[351638.252298]  process_one_work+0x1e2/0x3b0
[351638.252301]  ? __pfx_worker_thread+0x10/0x10
[351638.252303]  worker_thread+0x50/0x3a0
[351638.252305]  ? __pfx_worker_thread+0x10/0x10
[351638.252307]  kthread+0xdd/0x100
[351638.252309]  ? __pfx_kthread+0x10/0x10
[351638.252312]  ret_from_fork+0x29/0x50
[351638.252317]  </TASK>
[351638.252318] Modules linked in: nls_utf8 cifs cifs_arc4 rdma_cm iw_cm ib_cm ib_core cifs_md4 rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs tls snd_seq_dummy snd_hrtimer snd_seq snd_timer snd_seq_device snd soundcore qrtr rfkill vsock_loopback vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock sunrpc binfmt_misc vfat fat intel_rapl_msr intel_rapl_common intel_uncore_frequency_common isst_if_mbox_msr isst_if_common nfit libnvdimm vmw_balloon rapl pcspkr vmw_vmci i2c_piix4 joydev xfs libcrc32c sr_mod cdrom ata_generic vmwgfx drm_ttm_helper ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm ata_piix sd_mod ahci t10_pi libahci sg libata crct10dif_pclmul crc32_pclmul crc32c_intel vmxnet3 ghash_clmulni_intel vmw_pvscsi serio_raw dm_mirror dm_region_hash dm_log dm_mod fuse
[351638.252364] CR2: 0000000000000000

• Another Kernel panic with logs:

[37360.804977] BUG: kernel NULL pointer dereference, address: 0000000000000048
[37360.805027] #PF: supervisor read access in kernel mode
[37360.805049] #PF: error_code(0x0000) - not-present page
[37360.805071] PGD 0 P4D 0
[37360.805091] Oops: 0000 1 PREEMPT SMP PTI
[37360.805113] CPU: 2 PID: 7602 Comm: dfs_test.sh Kdump: loaded Not tainted 5.14.0-444.el9.x86_64 #1
[37360.805151] Hardware name: HP HP Z4 G4 Workstation/81C5, BIOS P61 v02.92 08/10/2023
[37360.805185] RIP: 0010:cifs_get_fattr+0x19b/0x700 [cifs]
[37360.805381] Code: 00 00 65 48 2b 04 25 28 00 00 00 0f 85 73 05 00 00 48 81 c4 f0 01 00 00 44 89 d0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc <49> 8b 41 48 4c 89 4c 24 20 48 89 d9 4c 89 f2 8b 7c 24 04 4c 8d 44
[37360.805436] RSP: 0018:ffffb3fec1423880 EFLAGS: 00010246
[37360.805457] RAX: ffff9acb03895000 RBX: ffff9acb01229ff8 RCX: 0000000000000000
[37360.805479] RDX: 0000000001cf38dc RSI: ffff9acb52d5b000 RDI: ffff9acb05b4b840
[37360.805502] RBP: 0000000000000000 R08: ffffb3fec1423ab0 R09: 0000000000000000
[37360.805524] R10: 000000002ee354c0 R11: 0000000000000000 R12: ffffb3fec1423ab0
[37360.805546] R13: ffff9acb52d5b000 R14: ffff9acb05b4b840 R15: ffff9acb03896000
[37360.805568] FS: 00007fb8bf836740(0000) GS:ffff9ad260080000(0000) knlGS:0000000000000000
[37360.805602] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[37360.805623] CR2: 0000000000000048 CR3: 000000015616e006 CR4: 00000000003706f0
[37360.805645] Call Trace:
[37360.805662] <TASK>
[37360.805680] ? show_trace_log_lvl+0x1c4/0x2df
[37360.805703] ? show_trace_log_lvl+0x1c4/0x2df
[37360.805725] ? cifs_get_inode_info+0x78/0x140 [cifs]
[37360.805853] ? __die_body.cold+0x8/0xd
[37360.805873] ? page_fault_oops+0x134/0x170
[37360.805894] ? exc_page_fault+0x62/0x150
[37360.805915] ? asm_exc_page_fault+0x22/0x30
[37360.805937] ? cifs_get_fattr+0x19b/0x700 [cifs]
[37360.806104] cifs_get_inode_info+0x78/0x140 [cifs]
[37360.806282] cifs_revalidate_dentry_attr+0x180/0x3a0 [cifs]
[37360.806411] cifs_revalidate_dentry+0xf/0x30 [cifs]
[37360.806537] cifs_d_revalidate+0x57/0x160 [cifs]
[37360.806661] lookup_fast+0xda/0x160
[37360.806682] walk_component+0x41/0x1d0
[37360.811026] link_path_walk.part.0.constprop.0+0x24e/0x3c0
[37360.811050] ? path_init+0x2c5/0x3f0
[37360.811069] path_openat+0xb1/0x280
[37360.811089] do_filp_open+0xb2/0x160
[37360.811110] ? path_get+0x11/0x30
[37360.811128] ? audit_alloc_name+0x138/0x150
[37360.811150] do_sys_openat2+0x96/0xd0
[37360.811172] __x64_sys_openat+0x53/0xa0
[37360.811191] do_syscall_64+0x5c/0xf0
[37360.811211] ? exit_to_user_mode_loop+0xd0/0x130
[37360.811234] ? exit_to_user_mode_prepare+0xb6/0x100
[37360.811255] ? syscall_exit_to_user_mode+0x22/0x40
[37360.811275] ? do_syscall_64+0x6b/0xf0
[37360.811294] ? syscall_exit_to_user_mode+0x22/0x40
[37360.811314] ? do_syscall_64+0x6b/0xf0
[37360.811332] ? do_syscall_64+0x6b/0xf0
[37360.811351] ? do_syscall_64+0x6b/0xf0
[37360.811370] ? sysvec_call_function_single+0x3c/0x90
[37360.811391] entry_SYSCALL_64_after_hwframe+0x6e/0x76
[37360.811413] RIP: 0033:0x7fb8bf70282c
[37360.811450] Code: 24 18 31 c0 41 83 e2 40 75 44 89 f0 25 00 00 41 00 3d 00 00 41 00 74 36 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 44 48 8b 54 24 18 64 48 2b 14 25 28 00 00 00
[37360.811506] RSP: 002b:00007ffe4959ca50 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
[37360.811539] RAX: ffffffffffffffda RBX: 0000000000000037 RCX: 00007fb8bf70282c
[37360.811562] RDX: 0000000000090800 RSI: 00005651ad7b41c0 RDI: 00000000ffffff9c
[37360.811584] RBP: 00007ffe4959cc00 R08: 0000000000090800 R09: 00005651ad7b41c0
[37360.811606] R10: 0000000000000000 R11: 0000000000000287 R12: 00005651acdabe2e
[37360.811628] R13: 00005651ab8fb690 R14: 0000000000000000 R15: 00005651acdabe2d
[37360.811653] </TASK>
[37360.811669] Modules linked in: tls nls_utf8 cifs cifs_arc4 rdma_cm iw_cm ib_cm ib_core cifs_md4 dns_resolver binfmt_misc nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables nfnetlink qrtr intel_rapl_msr intel_rapl_common intel_uncore_frequency intel_uncore_frequency_common isst_if_common skx_edac nfit libnvdimm x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm snd_soc_avs snd_soc_hda_codec irqbypass snd_hda_ext_core rapl iTCO_wdt snd_hda_codec_realtek intel_cstate snd_soc_core mei_wdt iTCO_vendor_support snd_hda_codec_generic snd_hda_codec_hdmi ledtrig_audio snd_compress snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hda_core hp_wmi snd_hwdep platform_profile snd_seq sparse_keymap wmi_bmof snd_seq_device intel_uncore rfkill intel_wmi_thunderbolt snd_pcm pcspkr snd_timer snd mei_me soundcore i2c_i801 i2c_smbus mei
[37360.811718] ioatdma auth_rpcgss drm sunrpc ip_tables ip6_tables xfs libcrc32c sd_mod t10_pi sg crct10dif_pclmul ahci crc32_pclmul libahci crc32c_intel igb ghash_clmulni_intel e1000e libata serio_raw dca i2c_algo_bit wmi dm_mirror dm_region_hash dm_log dm_mod fuse
[37360.812034] CR2: 0000000000000048