In the Linux kernel, the following vulnerability has been resolved:
jfs: reject on-disk inodes of an unsupported type
Syzbot has reported the following BUG:
kernel BUG at fs/inode.c:668! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 3 UID: 0 PID: 139 Comm: jfsCommit Not tainted 6.12.0-rc4-syzkaller-00085-g4e46774408d9 #0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014 RIP: 0010:clear_inode+0x168/0x190 Code: 4c 89 f7 e8 ba fe e5 ff e9 61 ff ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 7c c1 4c 89 f7 e8 90 ff e5 ff eb b7 0b e8 01 5d 7f ff 90 0f 0b e8 f9 5c 7f ff 90 0f 0b e8 f1 5c 7f RSP: 0018:ffffc900027dfae8 EFLAGS: 00010093 RAX: ffffffff82157a87 RBX: 0000000000000001 RCX: ffff888104d4b980 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900027dfc90 R08: ffffffff82157977 R09: fffff520004fbf38 R10: dffffc0000000000 R11: fffff520004fbf38 R12: dffffc0000000000 R13: ffff88811315bc00 R14: ffff88811315bda8 R15: ffff88811315bb80 FS: 0000000000000000(0000) GS:ffff888135f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005565222e0578 CR3: 0000000026ef0000 CR4: 00000000000006f0 Call Trace: <TASK> ? __die_body+0x5f/0xb0 ? die+0x9e/0xc0 ? do_trap+0x15a/0x3a0 ? clear_inode+0x168/0x190 ? do_error_trap+0x1dc/0x2c0 ? clear_inode+0x168/0x190 ? __pfx_do_error_trap+0x10/0x10 ? report_bug+0x3cd/0x500 ? handle_invalid_op+0x34/0x40 ? clear_inode+0x168/0x190 ? exc_invalid_op+0x38/0x50 ? asm_exc_invalid_op+0x1a/0x20 ? clear_inode+0x57/0x190 ? clear_inode+0x167/0x190 ? clear_inode+0x168/0x190 ? clear_inode+0x167/0x190 jfs_evict_inode+0xb5/0x440 ? __pfx_jfs_evict_inode+0x10/0x10 evict+0x4ea/0x9b0 ? __pfx_evict+0x10/0x10 ? iput+0x713/0xa50 txUpdateMap+0x931/0xb10 ? __pfx_txUpdateMap+0x10/0x10 jfs_lazycommit+0x49a/0xb80 ? _raw_spin_unlock_irqrestore+0x8f/0x140 ? lockdep_hardirqs_on+0x99/0x150 ? __pfx_jfs_lazycommit+0x10/0x10 ? __pfx_default_wake_function+0x10/0x10 ? __kthread_parkme+0x169/0x1d0 ? __pfx_jfs_lazycommit+0x10/0x10 kthread+0x2f2/0x390 ? __pfx_jfs_lazycommit+0x10/0x10 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x4d/0x80 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK>
This happens when 'clear_inode()' makes an attempt to finalize an underlying JFS inode of unknown type. According to JFS layout description from https://jfs.sourceforge.net/project/pub/jfslayout.pdf, inode types from 5 to 15 are reserved for future extensions and should not be encountered on a valid filesystem. So add an extra check for valid inode type in 'copy_from_dinode()'.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linuxUpgrade linux-6.1 | May 15, 2025 | Apr 18, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Apr 18, 2025 |
| Suse | — | Upgrade dtb-amdUpgrade dtb-freescaleUpgrade gfs2-kmp-64kbUpgrade reiserfs-kmp-defaultUpgrade dtb-alteraUpgrade kernel-default-baseUpgrade kernel-zfcpdumpUpgrade kernel-docs-htmlUpgrade kernel-obs-qaUpgrade kernel-64kb-optionalUpgrade kernel-develUpgrade kernel-debug-develUpgrade ocfs2-kmp-defaultUpgrade kernel-rt_debugUpgrade kernel-default-optionalUpgrade kernel-kvmsmall-develUpgrade kernel-symsUpgrade dtb-renesasUpgrade dtb-xilinxUpgrade kernel-default-extraUpgrade kernel-64kbUpgrade kernel-default-livepatchUpgrade cluster-md-kmp-azureUpgrade dlm-kmp-64kbUpgrade dtb-exynosUpgrade kernel-default-develUpgrade kernel-kvmsmallUpgrade kselftests-kmp-64kbUpgrade kernel-default-livepatch-develUpgrade cluster-md-kmp-rtUpgrade dlm-kmp-defaultUpgrade reiserfs-kmp-rtUpgrade ocfs2-kmp-64kbUpgrade dtb-lgUpgrade dtb-marvellUpgrade gfs2-kmp-rtUpgrade ocfs2-kmp-azureUpgrade kernel-devel-rtUpgrade ocfs2-kmp-rtUpgrade kernel-macrosUpgrade cluster-md-kmp-defaultUpgrade dtb-apmUpgrade kernel-64kb-develUpgrade dtb-allwinnerUpgrade dtb-hisiliconUpgrade kernel-azure-extraUpgrade kernel-sourceUpgrade dtb-socionextUpgrade kernel-source-azureUpgrade dtb-appleUpgrade kernel-azure-optionalUpgrade dtb-broadcomUpgrade reiserfs-kmp-64kbUpgrade kernel-debugUpgrade dtb-amazonUpgrade kernel-devel-azureUpgrade dtb-qcomUpgrade kernel-rt_debug-vdsoUpgrade dlm-kmp-rtUpgrade kernel-rtUpgrade dtb-sprdUpgrade kernel-debug-vdsoUpgrade gfs2-kmp-azureUpgrade kernel-kvmsmall-vdsoUpgrade dlm-kmp-azureUpgrade kernel-defaultUpgrade kernel-azure-vdsoUpgrade kernel-rt-extraUpgrade kernel-64kb-extraUpgrade dtb-nvidiaUpgrade dtb-mediatekUpgrade cluster-md-kmp-64kbUpgrade kselftests-kmp-azureUpgrade kernel-azure-develUpgrade kernel-source-vanillaUpgrade kernel-default-base-rebuildUpgrade dtb-armUpgrade reiserfs-kmp-azureUpgrade kernel-syms-azureUpgrade kernel-source-rtUpgrade dtb-rockchipUpgrade kernel-rt-vdsoUpgrade kernel-rt-develUpgrade kernel-rt_debug-develUpgrade kernel-azureUpgrade kselftests-kmp-defaultUpgrade kernel-syms-rtUpgrade kernel-rt-livepatch-develUpgrade kernel-docsUpgrade kernel-default-vdsoUpgrade gfs2-kmp-defaultUpgrade kernel-obs-buildUpgrade kselftests-kmp-rtUpgrade dtb-amlogicUpgrade dtb-caviumUpgrade kernel-rt-optional | Dec 5, 2025 | Jun 16, 2025 |
| Ubuntu | — | Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-gcp-6.8Upgrade linux-image-azure-cvmUpgrade linux-image-5.15.0-1097-aws-64kUpgrade linux-image-6.14.0-1007-raspiUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-aws-fipsUpgrade linux-image-5.15.0-1089-kvmUpgrade linux-image-6.8.0-1046-nvidiaUpgrade linux-image-aws-fips-5.15Upgrade linux-image-6.8.0-1046-aws-64kUpgrade linux-image-oracleUpgrade linux-image-6.14.0-1007-oracleUpgrade linux-image-aws-5.15Upgrade linux-image-6.8.0-1047-gcp-64kUpgrade linux-image-5.15.0-1061-xilinx-zynqmpUpgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-5.15.0-1101-azure-fipsUpgrade linux-image-aws-lts-22.04Upgrade linux-image-azure-fdeUpgrade linux-image-6.8.1-1041-realtimeUpgrade linux-image-generic-64k-6.8Upgrade linux-image-6.14.0-1007-oracle-64kUpgrade linux-image-virtual-5.15Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-azure-fipsUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-realtimeUpgrade linux-image-gcp-fips-5.15Upgrade linux-image-gcp-lts-22.04Upgrade linux-image-6.14.0-1004-realtimeUpgrade linux-image-6.8.0-1046-aws-fipsUpgrade linux-image-oem-22.04bUpgrade linux-image-gke-64kUpgrade linux-image-5.15.0-163-lowlatency-64kUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-virtualUpgrade linux-image-gcp-5.15Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-fips-6.8Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-6.8.0-1044-ibmUpgrade linux-image-aws-fips-6.8Upgrade linux-image-gkeop-5.15Upgrade linux-image-6.8.0-1043-oracle-64kUpgrade linux-image-generic-5.15Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-100-lowlatency-64kUpgrade linux-image-ibm-classicUpgrade linux-image-5.15.0-1092-nvidiaUpgrade linux-image-5.15.0-1038-nvidia-tegra-igxUpgrade linux-image-5.15.0-1049-nvidia-tegraUpgrade linux-image-6.14.0-1007-azureUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-5.15.0-1091-ibmUpgrade linux-image-6.14.0-22-genericUpgrade linux-image-awsUpgrade linux-image-generic-64k-5.15Upgrade linux-image-aws-64k-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-oem-20.04dUpgrade linux-image-ibm-6.8Upgrade linux-image-raspi-nolpaeUpgrade linux-image-aws-64k-5.15Upgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-kvmUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-6.8.0-2037-raspi-realtimeUpgrade linux-image-6.8.0-1046-nvidia-lowlatencyUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-aws-lts-24.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-5.15.0-1097-gcp-fipsUpgrade linux-image-5.15.0-1094-oracleUpgrade linux-image-5.15.0-163-generic-64kUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.8.0-1046-nvidia-64kUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-6.8.0-1043-gke-64kUpgrade linux-image-6.8.0-1030-gkeopUpgrade linux-image-5.15.0-1038-nvidia-tegra-igx-rtUpgrade linux-image-lowlatency-6.8Upgrade linux-image-oem-22.04dUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-5.15.0-1101-azureUpgrade linux-image-generic-6.8Upgrade linux-image-6.14.0-1007-awsUpgrade linux-image-6.8.0-100-generic-64kUpgrade linux-image-6.8.0-1047-gcp-fipsUpgrade linux-image-6.8.0-100-lowlatencyUpgrade linux-image-gke-64k-6.8Upgrade linux-image-6.8.0-1046-azureUpgrade linux-image-6.8.0-100-genericUpgrade linux-image-realtime-6.8.1Upgrade linux-image-gke-5.15Upgrade linux-image-azure-fips-5.15Upgrade linux-image-6.14.0-1008-gcp-64kUpgrade linux-image-6.14.0-22-generic-64kUpgrade linux-image-5.15.0-1096-realtimeUpgrade linux-image-5.15.0-1049-nvidia-tegra-rtUpgrade linux-image-aws-6.8Upgrade linux-image-ibm-5.15Upgrade linux-image-oem-22.04cUpgrade linux-image-virtual-6.8Upgrade linux-image-6.8.0-1043-gkeUpgrade linux-image-generic-lpae-5.15Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-5.15.0-1097-gcpUpgrade linux-image-lowlatency-64kUpgrade linux-image-lowlatency-5.15Upgrade linux-image-raspi-6.8Upgrade linux-image-6.8.0-1046-azure-fipsUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-6.8.0-1023-xilinxUpgrade linux-image-5.15.0-1092-nvidia-lowlatencyUpgrade linux-image-5.15.0-163-generic-lpaeUpgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-6.8.0-100-fipsUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-6.8.0-1047-raspiUpgrade linux-image-gkeopUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-xilinx-6.8Upgrade linux-image-5.15.0-163-fipsUpgrade linux-image-xilinxUpgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-oracle-5.15Upgrade linux-image-oem-22.04Upgrade linux-image-generic-lpaeUpgrade linux-image-5.15.0-163-lowlatencyUpgrade linux-image-genericUpgrade linux-image-azure-lts-22.04Upgrade linux-image-gcp-fipsUpgrade linux-image-5.15.0-1097-aws-fipsUpgrade linux-image-5.15.0-1093-gkeUpgrade linux-image-6.8.0-1046-awsUpgrade linux-image-gkeop-6.8Upgrade linux-image-gke-6.8Upgrade linux-image-realtime-5.15Upgrade linux-image-nvidia-5.15Upgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-gcp-64kUpgrade linux-image-azure-fips-6.8Upgrade linux-image-nvidia-64kUpgrade linux-image-kvm-5.15Upgrade linux-image-5.15.0-1092-intel-iotgUpgrade linux-image-oem-22.04aUpgrade linux-image-5.15.0-1102-azureUpgrade linux-image-gkeUpgrade linux-image-fips-5.15Upgrade linux-image-raspi-5.15Upgrade linux-image-azure-6.8Upgrade linux-image-lowlatencyUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-5.15.0-1097-awsUpgrade linux-image-6.8.0-1043-oracleUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oracle-64kUpgrade linux-image-6.14.0-1007-azure-fdeUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-5.15.0-163-genericUpgrade linux-image-azureUpgrade linux-image-oem-20.04bUpgrade linux-image-oracle-6.8Upgrade linux-image-6.8.0-1046-nvidia-lowlatency-64kUpgrade linux-image-6.14.0-1008-gcpUpgrade linux-image-fipsUpgrade linux-image-nvidia-tegraUpgrade linux-image-nvidiaUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1047-gcpUpgrade linux-image-5.15.0-1089-intel-iot-realtimeUpgrade linux-image-gcpUpgrade linux-image-oem-20.04cUpgrade linux-image-aws-64kUpgrade linux-image-azure-lts-24.04Upgrade linux-image-5.15.0-1091-raspiUpgrade linux-image-6.14.0-1007-aws-64kUpgrade linux-image-generic-64kUpgrade linux-image-oem-20.04Upgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-raspiUpgrade linux-image-nvidia-6.8Upgrade linux-image-ibmUpgrade linux-image-raspi-realtimeUpgrade linux-image-azure-5.15Upgrade linux-image-5.15.0-1080-gkeopUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.8.0-1051-azureUpgrade linux-image-intel-iotg-5.15Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-intelUpgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-intel-iotg | Jun 26, 2025 | Apr 18, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 7, 2025 | Apr 18, 2025 |
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