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In the Linux kernel, the following vulnerability has been resolved:
f2fs: ensure node page reads complete before f2fs_put_super() finishes
Xfstests generic/335, generic/336 sometimes crash with the following message:
F2FS-fs (dm-0): detect filesystem reference count leak during umount, type: 9, count: 1 ------------[ cut here ]------------ kernel BUG at fs/f2fs/super.c:1939! Oops: invalid opcode: 0000 [#1] SMP NOPTI CPU: 1 UID: 0 PID: 609351 Comm: umount Tainted: G W 6.17.0-rc5-xfstests-g9dd1835ecda5 #1 PREEMPT(none) Tainted: [W]=WARN Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:f2fs_put_super+0x3b3/0x3c0 Call Trace: <TASK> generic_shutdown_super+0x7e/0x190 kill_block_super+0x1a/0x40 kill_f2fs_super+0x9d/0x190 deactivate_locked_super+0x30/0xb0 cleanup_mnt+0xba/0x150 task_work_run+0x5c/0xa0 exit_to_user_mode_loop+0xb7/0xc0 do_syscall_64+0x1ae/0x1c0 entry_SYSCALL_64_after_hwframe+0x76/0x7e </TASK> ---[ end trace 0000000000000000 ]---
It appears that sometimes it is possible that f2fs_put_super() is called before all node page reads are completed. Adding a call to f2fs_wait_on_all_pages() for F2FS_RD_NODE fixes the problem.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Ubuntu | — | Upgrade linux-image-awsUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.8.0-1029-xilinxUpgrade linux-image-6.8.0-1050-gke-64kUpgrade linux-image-generic-64k-6.17Upgrade linux-image-gke-64kUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.17.0-1012-gcpUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-nvidia-6.8Upgrade linux-image-6.17.0-1012-gcp-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-genericUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-generic-6.17Upgrade linux-image-6.8.0-1051-ibmUpgrade linux-image-gcp-6.8Upgrade linux-image-azure-6.17Upgrade linux-image-lowlatencyUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-gcp-64k-6.17Upgrade linux-image-6.17.0-1014-raspiUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-aws-fipsUpgrade linux-image-6.8.0-1051-nvidiaUpgrade linux-image-lowlatency-6.8Upgrade linux-image-6.8.0-1051-nvidia-lowlatencyUpgrade linux-image-6.8.0-1052-aws-fipsUpgrade linux-image-6.8.0-1049-oracleUpgrade linux-image-oem-22.04aUpgrade linux-image-realtimeUpgrade linux-image-6.17.0-1013-azureUpgrade linux-image-6.17.0-1020-oemUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-oem-22.04Upgrade linux-image-nvidiaUpgrade linux-image-oem-24.04bUpgrade linux-image-oem-6.17Upgrade linux-image-6.8.0-1059-azureUpgrade linux-image-6.17.0-1012-awsUpgrade linux-image-fipsUpgrade linux-image-generic-lpaeUpgrade linux-image-virtual-6.8Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-oracleUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-oracle-64k-6.17Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-ibmUpgrade linux-image-6.17.0-22-generic-64kUpgrade linux-image-6.8.0-1052-raspiUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-oracle-6.17Upgrade linux-image-generic-64k-6.8Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-aws-64k-6.17Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-gcp-fipsUpgrade linux-image-6.17.0-1011-oracle-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-1022-nvidia-tegraUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-6.8.0-1051-nvidia-64kUpgrade linux-image-6.8.0-1054-gcp-fipsUpgrade linux-image-6.8.0-1052-aws-64kUpgrade linux-image-6.8.0-1050-gkeUpgrade linux-image-oem-24.04aUpgrade linux-image-oem-24.04cUpgrade linux-image-aws-64k-6.8Upgrade linux-image-6.17.0-1012-aws-64kUpgrade linux-image-6.8.0-1037-gkeopUpgrade linux-image-virtual-6.17Upgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-110-generic-64kUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-gcp-6.17Upgrade linux-image-aws-6.8Upgrade linux-image-xilinxUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-oracle-6.8Upgrade linux-image-oem-24.04dUpgrade linux-image-oem-22.04dUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-gke-6.8Upgrade linux-image-azure-lts-24.04Upgrade linux-image-azureUpgrade linux-image-aws-64kUpgrade linux-image-6.8.0-110-lowlatency-64kUpgrade linux-image-6.8.0-110-fipsUpgrade linux-image-6.8.0-1054-gcpUpgrade linux-image-azure-6.8Upgrade linux-image-azure-fips-6.8Upgrade linux-image-xilinx-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-raspi-6.17Upgrade linux-image-oem-24.04Upgrade linux-image-kvmUpgrade linux-image-6.8.0-110-lowlatencyUpgrade linux-image-oem-22.04bUpgrade linux-image-6.17.0-1011-oracleUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-generic-64kUpgrade linux-image-azure-fipsUpgrade linux-image-6.8.1-1047-realtimeUpgrade linux-image-6.8.0-1054-gcp-64kUpgrade linux-image-6.17.0-1010-realtimeUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-raspi-6.8Upgrade linux-image-6.17.0-22-genericUpgrade linux-image-gke-64k-6.8Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-oem-22.04cUpgrade linux-image-nvidia-tegraUpgrade linux-image-nvidia-64kUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-intel-iotgUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-ibm-6.8Upgrade linux-image-6.8.0-110-genericUpgrade linux-image-gcp-64kUpgrade linux-image-aws-6.17Upgrade linux-image-6.8.0-1049-oracle-64kUpgrade linux-image-gcpUpgrade linux-image-gkeopUpgrade linux-image-gkeUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-fips-6.8Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-aws-lts-24.04Upgrade linux-image-generic-6.8Upgrade linux-image-virtualUpgrade linux-image-6.8.0-1022-nvidia-tegra-rtUpgrade linux-image-realtime-6.8.1Upgrade linux-image-realtime-6.17Upgrade linux-image-6.8.0-1051-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1054-azureUpgrade linux-image-aws-fips-6.8Upgrade linux-image-raspiUpgrade linux-image-6.8.0-2042-raspi-realtimeUpgrade linux-image-6.8.0-1054-azure-fipsUpgrade linux-image-6.8.0-1052-aws | Apr 17, 2026 | Jan 14, 2026 |
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