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Bug#1136978: linux-image-7.0.4+deb14-amd64: kernel NULL pointer dereference

Cross-posted to 2 groups.

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In case this matters, after the first try of 7.0.4+deb14-amd64
(which made the machine freeze), I tried the 6.7.12-amd64 kernel
again (this is the other kernel I keep and often use as this was
the latest one where Debian bug 1072063 was absent), and for the
first time, I also got a kernel Oops (this is not due to a recent
upgrade as the last rebuild of initrd.img-6.7.12-amd64 was on
2025-12-13):

May 13 12:38:19 qaa kernel: Linux version 6.7.12-amd64 (debian-kernel@lists.debian.org) (x86_64-linux-gnu-gcc-13 (Debian 13.2.0-23) 13.2.0, GNU ld (GNU Binutils for Debian) 2.42) #1 SMP PREEMPT_DYNAMIC Debian 6.7.12-1 (2024-04-24)
May 13 12:38:19 qaa kernel: Command line: BOOT_IMAGE=/vmlinuz-6.7.12-amd64 root=/dev/mapper/qaa--vg-root ro quiet
[...]
May 13 12:38:19 qaa systemd[1]: Mounting dev-hugepages.mount - Huge Pages File System...
May 13 12:38:19 qaa systemd[1]: Mounting dev-mqueue.mount - POSIX Message Queue File System...
May 13 12:38:19 qaa systemd[1]: Mounting sys-kernel-debug.mount - Kernel Debug File System...
May 13 12:38:19 qaa systemd[1]: Mounting sys-kernel-tracing.mount - Kernel Trace File System...
May 13 12:38:19 qaa systemd[1]: Starting blk-availability.service - Availability of block devices...
May 13 12:38:19 qaa systemd[1]: Starting keyboard-setup.service - Set the console keyboard layout...
May 13 12:38:19 qaa systemd[1]: Starting kmod-static-nodes.service - Create List of Static Device Nodes...
May 13 12:38:19 qaa systemd[1]: Starting lvm2-monitor.service - Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress polling...
May 13 12:38:19 qaa systemd[1]: Starting modprobe@configfs.service - Load Kernel Module configfs...
May 13 12:38:19 qaa systemd[1]: modprobe@drm.service - Load Kernel Module drm skipped, unmet condition check ConditionKernelModuleLoaded=!drm
May 13 12:38:19 qaa systemd[1]: Starting modprobe@efi_pstore.service - Load Kernel Module efi_pstore...
May 13 12:38:19 qaa systemd[1]: modprobe@fuse.service - Load Kernel Module fuse skipped, unmet condition check ConditionKernelModuleLoaded=!fuse
May 13 12:38:19 qaa systemd[1]: Mounting sys-fs-fuse-connections.mount - FUSE Control File System...
May 13 12:38:19 qaa systemd[1]: systemd-fsck-root.service - File System Check on Root Device skipped, unmet condition check ConditionPathExists=!/run/initramfs/fsck-root
May 13 12:38:19 qaa systemd[1]: systemd-hibernate-clear.service - Clear Stale Hibernate Storage Info skipped, unmet condition check ConditionPathExists=/sys/firmware/efi/efivars/HibernateLocation-8cf2644b-4b0b-428f-9387-6d876050dc67
May 13 12:38:19 qaa systemd[1]: Starting systemd-journald.service - Journal Service...
May 13 12:38:19 qaa systemd[1]: Starting systemd-modules-load.service - Load Kernel Modules...
May 13 12:38:19 qaa systemd[1]: systemd-pcrmachine.service - TPM PCR Machine ID Measurement skipped, unmet condition check ConditionSecurity=measured-uki
May 13 12:38:19 qaa systemd[1]: systemd-pcrproduct.service - TPM NvPCR Product ID Measurement skipped, unmet condition check ConditionSecurity=measured-uki
May 13 12:38:19 qaa systemd[1]: Starting systemd-remount-fs.service - Remount Root and Kernel File Systems...
May 13 12:38:19 qaa systemd[1]: systemd-tpm2-setup-early.service - Early TPM SRK Setup skipped, unmet condition check ConditionSecurity=measured-uki
May 13 12:38:19 qaa systemd[1]: Starting systemd-udev-load-credentials.service - Load udev Rules from Credentials...
May 13 12:38:19 qaa systemd[1]: Starting systemd-udev-trigger.service - Coldplug All udev Devices...
May 13 12:38:19 qaa systemd[1]: Mounted dev-hugepages.mount - Huge Pages File System.
May 13 12:38:19 qaa systemd[1]: Mounted dev-mqueue.mount - POSIX Message Queue File System.
May 13 12:38:19 qaa systemd[1]: Mounted sys-kernel-debug.mount - Kernel Debug File System.
May 13 12:38:19 qaa systemd[1]: Mounted sys-kernel-tracing.mount - Kernel Trace File System.
May 13 12:38:19 qaa kernel: pstore: Using crash dump compression: deflate
May 13 12:38:19 qaa kernel: pstore: Registered efi_pstore as persistent store backend
May 13 12:38:19 qaa kernel: i2c_dev: i2c /dev entries driver
May 13 12:38:19 qaa kernel: ppdev: user-space parallel port driver
May 13 12:38:19 qaa kernel: really_probe: driver_sysfs_add(lp.0) failed
May 13 12:38:19 qaa systemd-journald[768]: Collecting audit messages is disabled.
May 13 12:38:19 qaa kernel: kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
May 13 12:38:19 qaa kernel: BUG: unable to handle page fault for address: ffff9fbd25216348
May 13 12:38:19 qaa kernel: #PF: supervisor instruction fetch in kernel mode
May 13 12:38:19 qaa kernel: #PF: error_code(0x0011) - permissions violation
May 13 12:38:19 qaa kernel: PGD 708601067 P4D 708601067 PUD 708794063 PMD 109700063 PTE 8000000125216163
May 13 12:38:19 qaa kernel: Oops: 0011 [#1] PREEMPT SMP NOPTI
May 13 12:38:19 qaa kernel: CPU: 6 PID: 778 Comm: systemd-modules Not tainted 6.7.12-amd64 #1  Debian 6.7.12-1
May 13 12:38:19 qaa kernel: Hardware name: Dell Inc. Precision 5570/01Y4G1, BIOS 1.39.0 12/24/2025
May 13 12:38:19 qaa kernel: RIP: 0010:0xffff9fbd25216348
May 13 12:38:19 qaa kernel: Code: ff ff c0 60 20 00 bd 9f ff ff c0 10 32 a3 ff ff ff ff 00 4d 12 3a bd 9f ff ff 01 00 00 00 07 00 00 00 00 00 00 00 00 00 00 00 <48> 63 21 25 bd 9f ff ff 48 63 21 25 bd 9f ff ff 00 00 00 00 00 00
May 13 12:38:19 qaa kernel: RSP: 0018:ffffafa141277b98 EFLAGS: 00010286
May 13 12:38:19 qaa kernel: RAX: ffff9fbd25216348 RBX: ffff9fbd2500c800 RCX: 0000000000000000
May 13 12:38:19 qaa kernel: RDX: ffffffffc16c17c0 RSI: ffff9fbd3b969280 RDI: ffff9fbd2500c800
May 13 12:38:19 qaa kernel: RBP: ffff9fbd071cf800 R08: ffff9fbd027b7308 R09: 0000000000000000
May 13 12:38:19 qaa kernel: R10: ffff9fbd0116ba80 R11: ffffafa162ea443c R12: ffffffffc16df11c
May 13 12:38:19 qaa kernel: R13: 0000000000000000 R14: ffff9fbd071cf840 R15: ffffafa141277be8
May 13 12:38:19 qaa kernel: FS:  00007f87756006c0(0000) GS:ffff9fc46f580000(0000) knlGS:0000000000000000
May 13 12:38:19 qaa kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
May 13 12:38:19 qaa kernel: CR2: ffff9fbd25216348 CR3: 000000013b46c000 CR4: 0000000000f50ef0
May 13 12:38:19 qaa kernel: PKRU: 55555554
May 13 12:38:19 qaa kernel: Call Trace:
May 13 12:38:19 qaa kernel:  <TASK>
May 13 12:38:19 qaa kernel:  ? __die+0x23/0x70
May 13 12:38:19 qaa kernel:  ? page_fault_oops+0x171/0x4e0
May 13 12:38:19 qaa kernel:  ? exc_page_fault+0x175/0x180
May 13 12:38:19 qaa kernel:  ? asm_exc_page_fault+0x26/0x30
May 13 12:38:19 qaa kernel:  ? parport_register_dev_model+0x25e/0x3b0 [parport]
May 13 12:38:19 qaa kernel:  ? lp_register+0x7a/0x140 [lp]
May 13 12:38:19 qaa kernel:  ? __pfx_lp_preempt+0x10/0x10 [lp]
May 13 12:38:19 qaa kernel:  ? __pfx_port_check+0x10/0x10 [parport]
May 13 12:38:19 qaa kernel:  ? lp_attach+0x6c/0xa0 [lp]
May 13 12:38:19 qaa kernel:  ? port_check+0x24/0x30 [parport]
May 13 12:38:19 qaa kernel:  ? bus_for_each_dev+0x85/0xd0
May 13 12:38:19 qaa kernel:  ? __parport_register_driver+0x82/0xb0 [parport]
May 13 12:38:19 qaa kernel:  ? lp_init_module+0x217/0xff0 [lp]
May 13 12:38:19 qaa kernel:  ? __pfx_lp_init_module+0x10/0x10 [lp]
May 13 12:38:19 qaa kernel:  ? do_one_initcall+0x58/0x320
May 13 12:38:19 qaa kernel:  ? do_init_module+0x60/0x240
May 13 12:38:19 qaa kernel:  ? init_module_from_file+0x89/0xe0
May 13 12:38:19 qaa kernel:  ? idempotent_init_module+0x120/0x2b0
May 13 12:38:19 qaa kernel:  ? __x64_sys_finit_module+0x5e/0xb0
May 13 12:38:19 qaa kernel:  ? do_syscall_64+0x61/0x120
May 13 12:38:19 qaa kernel:  ? exit_to_user_mode_prepare+0x40/0x1e0
May 13 12:38:19 qaa kernel:  ? entry_SYSCALL_64_after_hwframe+0x73/0x7b
May 13 12:38:19 qaa kernel:  </TASK>
May 13 12:38:19 qaa kernel: Modules linked in: parport_pc ppdev lp(+) parport i2c_dev msr configfs efi_pstore nfnetlink efivarfs autofs4 ext4 crc16 mbcache jbd2 crc32c_generic r8153_ecm cdc_ether usbnet dm_crypt dm_mod r8152 mii hid_apple usbhid hid_sensor_custom hid_sensor_hub intel_ishtp_hid i915 nouveau nvme nvme_core t10_pi crc64_rocksoft_generic crc64_rocksoft crc_t10dif crct10dif_generic crc64 ahci libahci libata drm_gpuvm mxm_wmi drm_exec gpu_sched drm_buddy crct10dif_pclmul i2c_algo_bit crct10dif_common crc32_pclmul crc32c_intel drm_display_helper scsi_mod ghash_clmulni_intel cec sha512_ssse3 sha512_generic rc_core hid_multitouch sha256_ssse3 hid_generic rtsx_pci_sdmmc xhci_pci sha1_ssse3 iTCO_wdt drm_ttm_helper scsi_common mmc_core intel_pmc_bxt ttm iTCO_vendor_support i2c_hid_acpi xhci_hcd drm_kms_helper watchdog i2c_hid psmouse aesni_intel hid ucsi_acpi typec_ucsi video crypto_simd drm thunderbolt typec rtsx_pci cryptd serio_raw usbcore battery button roles intel_ish_ipc i2c_i801 intel_lpss_pci intel_ishtp intel_lpss wmi
May 13 12:38:19 qaa kernel:  i2c_smbus vmd idma64 usb_common
May 13 12:38:19 qaa kernel: CR2: ffff9fbd25216348
May 13 12:38:19 qaa kernel: ---[ end trace 0000000000000000 ]---
May 13 12:38:19 qaa kernel: RIP: 0010:0xffff9fbd25216348
May 13 12:38:19 qaa kernel: Code: ff ff c0 60 20 00 bd 9f ff ff c0 10 32 a3 ff ff ff ff 00 4d 12 3a bd 9f ff ff 01 00 00 00 07 00 00 00 00 00 00 00 00 00 00 00 <48> 63 21 25 bd 9f ff ff 48 63 21 25 bd 9f ff ff 00 00 00 00 00 00
May 13 12:38:19 qaa kernel: RSP: 0018:ffffafa141277b98 EFLAGS: 00010286
May 13 12:38:19 qaa kernel: RAX: ffff9fbd25216348 RBX: ffff9fbd2500c800 RCX: 0000000000000000
May 13 12:38:19 qaa kernel: RDX: ffffffffc16c17c0 RSI: ffff9fbd3b969280 RDI: ffff9fbd2500c800
May 13 12:38:19 qaa kernel: RBP: ffff9fbd071cf800 R08: ffff9fbd027b7308 R09: 0000000000000000
May 13 12:38:19 qaa kernel: R10: ffff9fbd0116ba80 R11: ffffafa162ea443c R12: ffffffffc16df11c
May 13 12:38:19 qaa kernel: R13: 0000000000000000 R14: ffff9fbd071cf840 R15: ffffafa141277be8
May 13 12:38:19 qaa kernel: FS:  00007f87756006c0(0000) GS:ffff9fc46f580000(0000) knlGS:0000000000000000
May 13 12:38:19 qaa kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
May 13 12:38:19 qaa kernel: CR2: ffff9fbd25216348 CR3: 000000013b46c000 CR4: 0000000000f50ef0
May 13 12:38:19 qaa kernel: PKRU: 55555554
May 13 12:38:19 qaa kernel: note: systemd-modules[778] exited with irqs disabled
May 13 12:38:19 qaa systemd[1]: Finished blk-availability.service - Availability of block devices.
May 13 12:38:19 qaa systemd-journald[768]: Journal started
May 13 12:38:19 qaa systemd-journald[768]: Runtime Journal (/run/log/journal/cb030f2f6bc14e84932d062d3149e9b9) is 8M, max 317.7M, 309.7M free.
May 13 12:38:19 qaa systemd-modules-load[770]: Using 5 probe threads
May 13 12:38:19 qaa systemd-modules-load[770]: Inserted module 'i2c_dev'
May 13 12:38:19 qaa systemd-modules-load[770]: Inserted module 'msr'
May 13 12:38:19 qaa systemd-modules-load[770]: Inserted module 'ppdev'
May 13 12:38:19 qaa systemd-modules-load[770]: Inserted module 'parport_pc'
May 13 12:38:19 qaa lvm[763]:   2 logical volume(s) in volume group "qaa-vg" monitored
May 13 12:38:19 qaa systemd[1]: Started systemd-journald.service - Journal Service.
May 13 12:38:19 qaa kernel: EXT4-fs (dm-1): re-mounted f3a51d21-c3a1-405d-b0fb-b0b25662b752 r/w. Quota mode: none.
May 13 12:38:19 qaa systemd[1]: Finished keyboard-setup.service - Set the console keyboard layout.
May 13 12:38:20 qaa systemd[1]: Finished kmod-static-nodes.service - Create List of Static Device Nodes.
May 13 12:38:20 qaa systemd[1]: Finished lvm2-monitor.service - Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress polling.
May 13 12:38:20 qaa systemd[1]: modprobe@configfs.service: Deactivated successfully.
May 13 12:38:20 qaa systemd[1]: Finished modprobe@configfs.service - Load Kernel Module configfs.
May 13 12:38:20 qaa systemd[1]: modprobe@efi_pstore.service: Deactivated successfully.
May 13 12:38:20 qaa systemd[1]: Finished modprobe@efi_pstore.service - Load Kernel Module efi_pstore.
May 13 12:38:20 qaa systemd[1]: Mounted sys-fs-fuse-connections.mount - FUSE Control File System.
May 13 12:38:20 qaa systemd[1]: Finished systemd-modules-load.service - Load Kernel Modules.
May 13 12:38:20 qaa systemd[1]: Finished systemd-remount-fs.service - Remount Root and Kernel File Systems.
May 13 12:38:20 qaa systemd[1]: Finished systemd-udev-load-credentials.service - Load udev Rules from Credentials.
May 13 12:38:20 qaa systemd[1]: Finished systemd-udev-trigger.service - Coldplug All udev Devices.
May 13 12:38:20 qaa systemd[1]: Mounting sys-kernel-config.mount - Kernel Configuration File System...
May 13 12:38:20 qaa systemd[1]: Starting ifupdown-pre.service - Helper to synchronize boot up for ifupdown...
May 13 12:38:20 qaa systemd[1]: systemd-hwdb-update.service - Rebuild Hardware Database skipped, unmet condition check ConditionNeedsUpdate=/etc
May 13 12:38:20 qaa systemd[1]: Starting systemd-journal-flush.service - Flush Journal to Persistent Storage...
May 13 12:38:20 qaa systemd[1]: systemd-pstore.service - Platform Persistent Storage Archival skipped, unmet condition check ConditionDirectoryNotEmpty=/sys/fs/pstore
May 13 12:38:20 qaa systemd[1]: Starting systemd-random-seed.service - Load/Save OS Random Seed...
May 13 12:38:20 qaa systemd[1]: Starting systemd-sysctl.service - Apply Kernel Variables...
May 13 12:38:20 qaa systemd[1]: Starting systemd-tmpfiles-setup-dev-early.service - Create Static Device Nodes in /dev gracefully...
May 13 12:38:20 qaa systemd[1]: systemd-tpm2-setup.service - TPM SRK Setup skipped, unmet condition check ConditionSecurity=measured-uki
May 13 12:38:20 qaa systemd[1]: systemd-pcrnvdone.service - TPM PCR NvPCR Initialization Separator skipped, unmet condition check ConditionSecurity=measured-uki
May 13 12:38:20 qaa systemd[1]: Mounted sys-kernel-config.mount - Kernel Configuration File System.
May 13 12:38:20 qaa systemd-journald[768]: Time spent on flushing to /var/log/journal/cb030f2f6bc14e84932d062d3149e9b9 is 10.930ms for 1328 entries.

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)

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Bug#1136978: linux-image-7.0.4+deb14-amd64: kernel NULL pointer dereference Vincent Lefevre <vincent@vinc17.net> - 2026-05-18 00:20 +0200

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