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In the Linux kernel, the following vulnerability has been resolved:
scsi: hisi_sas: Set debugfs_dir pointer to NULL after removing debugfs
If init debugfs failed during device registration due to memory allocation failure, debugfs_remove_recursive() is called, after which debugfs_dir is not set to NULL. debugfs_remove_recursive() will be called again during device removal. As a result, illegal pointer is accessed.
[ 1665.467244] hisi_sas_v3_hw 0000:b4:02.0: failed to init debugfs! ... [ 1669.836708] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a0 [ 1669.872669] pc : down_write+0x24/0x70 [ 1669.876315] lr : down_write+0x1c/0x70 [ 1669.879961] sp : ffff000036f53a30 [ 1669.883260] x29: ffff000036f53a30 x28: ffffa027c31549f8 [ 1669.888547] x27: ffffa027c3140000 x26: 0000000000000000 [ 1669.893834] x25: ffffa027bf37c270 x24: ffffa027bf37c270 [ 1669.899122] x23: ffff0000095406b8 x22: ffff0000095406a8 [ 1669.904408] x21: 0000000000000000 x20: ffffa027bf37c310 [ 1669.909695] x19: 00000000000000a0 x18: ffff8027dcd86f10 [ 1669.914982] x17: 0000000000000000 x16: 0000000000000000 [ 1669.920268] x15: 0000000000000000 x14: ffffa0274014f870 [ 1669.925555] x13: 0000000000000040 x12: 0000000000000228 [ 1669.930842] x11: 0000000000000020 x10: 0000000000000bb0 [ 1669.936129] x9 : ffff000036f537f0 x8 : ffff80273088ca10 [ 1669.941416] x7 : 000000000000001d x6 : 00000000ffffffff [ 1669.946702] x5 : ffff000008a36310 x4 : ffff80273088be00 [ 1669.951989] x3 : ffff000009513e90 x2 : 0000000000000000 [ 1669.957276] x1 : 00000000000000a0 x0 : ffffffff00000001 [ 1669.962563] Call trace: [ 1669.965000] down_write+0x24/0x70 [ 1669.968301] debugfs_remove_recursive+0x5c/0x1b0 [ 1669.972905] hisi_sas_debugfs_exit+0x24/0x30 [hisi_sas_main] [ 1669.978541] hisi_sas_v3_remove+0x130/0x150 [hisi_sas_v3_hw] [ 1669.984175] pci_device_remove+0x48/0xd8 [ 1669.988082] device_release_driver_internal+0x1b4/0x250 [ 1669.993282] device_release_driver+0x28/0x38 [ 1669.997534] pci_stop_bus_device+0x84/0xb8 [ 1670.001611] pci_stop_and_remove_bus_device_locked+0x24/0x40 [ 1670.007244] remove_store+0xfc/0x140 [ 1670.010802] dev_attr_store+0x44/0x60 [ 1670.014448] sysfs_kf_write+0x58/0x80 [ 1670.018095] kernfs_fop_write+0xe8/0x1f0 [ 1670.022000] __vfs_write+0x60/0x190 [ 1670.025472] vfs_write+0xac/0x1c0 [ 1670.028771] ksys_write+0x6c/0xd8 [ 1670.032071] __arm64_sys_write+0x24/0x30 [ 1670.035977] el0_svc_common+0x78/0x130 [ 1670.039710] el0_svc_handler+0x38/0x78 [ 1670.043442] el0_svc+0x8/0xc
To fix this, set debugfs_dir to NULL after debugfs_remove_recursive().
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | May 21, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade python3-perfUpgrade bpftoolUpgrade kernelUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade kernel-tools-libs | Oct 8, 2024 | May 21, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 21, 2024 |
| Suse | — | Upgrade kernel-debugUpgrade kernel-default-manUpgrade kernel-macrosUpgrade kernel-rt_debugUpgrade kernel-zfcpdumpUpgrade dtb-amdUpgrade kernel-default-baseUpgrade kernel-devel-azureUpgrade kernel-64kb-optionalUpgrade kernel-syms-rtUpgrade kernel-azure-develUpgrade reiserfs-kmp-rtUpgrade kernel-defaultUpgrade dtb-hisiliconUpgrade kselftests-kmp-defaultUpgrade kernel-azure-livepatch-develUpgrade kselftests-kmp-rtUpgrade dtb-rockchipUpgrade kernel-default-livepatch-develUpgrade kernel-default-base-rebuildUpgrade gfs2-kmp-rtUpgrade dtb-socionextUpgrade kernel-symsUpgrade reiserfs-kmp-azureUpgrade dtb-armUpgrade ocfs2-kmp-rtUpgrade gfs2-kmp-64kbUpgrade kernel-rt-develUpgrade kernel-kvmsmall-develUpgrade kernel-kvmsmallUpgrade cluster-md-kmp-defaultUpgrade kernel-devel-rtUpgrade kernel-default-extraUpgrade kernel-docsUpgrade dtb-apmUpgrade kernel-64kb-develUpgrade kernel-64kb-livepatch-develUpgrade kernel-rt-livepatch-develUpgrade dtb-nvidiaUpgrade kernel-azure-vdsoUpgrade dtb-mediatekUpgrade kernel-rt_debug-vdsoUpgrade kernel-debug-livepatch-develUpgrade kernel-debug-develUpgrade kernel-obs-qaUpgrade dtb-caviumUpgrade kernel-sourceUpgrade reiserfs-kmp-defaultUpgrade dtb-xilinxUpgrade dtb-alteraUpgrade kernel-rt-extraUpgrade kernel-rtUpgrade dtb-marvellUpgrade dlm-kmp-azureUpgrade kernel-azure-baseUpgrade dtb-freescaleUpgrade ocfs2-kmp-defaultUpgrade kernel-64kbUpgrade kernel-source-vanillaUpgrade kernel-syms-azureUpgrade kernel-develUpgrade gfs2-kmp-azureUpgrade ocfs2-kmp-64kbUpgrade kernel-default-vdsoUpgrade kernel-source-rtUpgrade ocfs2-kmp-azureUpgrade dtb-renesasUpgrade dtb-exynosUpgrade dtb-appleUpgrade dtb-amazonUpgrade dtb-allwinnerUpgrade cluster-md-kmp-64kbUpgrade kernel-kvmsmall-vdsoUpgrade kernel-docs-htmlUpgrade kernel-azure-optionalUpgrade reiserfs-kmp-64kbUpgrade kernel-debug-vdsoUpgrade kernel-64kb-extraUpgrade cluster-md-kmp-azureUpgrade kernel-azureUpgrade dlm-kmp-rtUpgrade kernel-rt_debug-develUpgrade gfs2-kmp-defaultUpgrade dtb-amlogicUpgrade dlm-kmp-defaultUpgrade kselftests-kmp-64kbUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-rt-vdsoUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-default-livepatchUpgrade kselftests-kmp-azureUpgrade dtb-sprdUpgrade dtb-lgUpgrade dtb-broadcomUpgrade dtb-qcomUpgrade cluster-md-kmp-rtUpgrade kernel-default-develUpgrade kernel-azure-extraUpgrade kernel-obs-buildUpgrade kernel-default-optionalUpgrade dlm-kmp-64kbUpgrade kernel-source-azureUpgrade kernel-rt-optionalUpgrade kernel-rt-livepatch | Jun 13, 2024 | May 21, 2024 |
| Ubuntu | — | Upgrade linux-nvidia-tegraUpgrade linux-xilinx-zynqmpUpgrade linux-intel-iotgUpgrade linux-lowlatencyUpgrade linux-nvidiaUpgrade linux-gcp-5.15Upgrade linux-aws-fipsUpgrade linux-lowlatency-hwe-5.15Upgrade linux-oracleUpgrade linux-oracle-5.15Upgrade linux-ibmUpgrade linux-ibm-5.15Upgrade linux-kvmUpgrade linux-realtimeUpgrade linux-bluefieldUpgrade linux-intel-iotg-5.15Upgrade linux-aws-5.15Upgrade linux-gcpUpgrade linux-azure-5.15Upgrade linux-azure-fdeUpgrade linux-gkeUpgrade linux-fipsUpgrade linux-riscv-5.15Upgrade linux-intel-iot-realtimeUpgrade linux-gkeopUpgrade linux-awsUpgrade linux-nvidia-tegra-5.15Upgrade linux-azureUpgrade linuxUpgrade linux-nvidia-6.5Upgrade linux-gcp-fipsUpgrade linux-nvidia-tegra-igxUpgrade linux-gkeop-5.15Upgrade linux-raspiUpgrade linux-hwe-5.15 | Nov 19, 2024 | May 21, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2025 | May 21, 2024 |
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