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In the Linux kernel, the following vulnerability has been resolved:
scsi: hisi_sas: Fix a deadlock issue related to automatic dump
If we issue a disabling PHY command, the device attached with it will go offline, if a 2 bit ECC error occurs at the same time, a hung task may be found:
[ 4613.652388] INFO: task kworker/u256:0:165233 blocked for more than 120 seconds. [ 4613.666297] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4613.674809] task:kworker/u256:0 state:D stack: 0 pid:165233 ppid: 2 flags:0x00000208 [ 4613.683959] Workqueue: 0000:74:02.0_disco_q sas_revalidate_domain [libsas] [ 4613.691518] Call trace: [ 4613.694678] __switch_to+0xf8/0x17c [ 4613.698872] __schedule+0x660/0xee0 [ 4613.703063] schedule+0xac/0x240 [ 4613.706994] schedule_timeout+0x500/0x610 [ 4613.711705] __down+0x128/0x36c [ 4613.715548] down+0x240/0x2d0 [ 4613.719221] hisi_sas_internal_abort_timeout+0x1bc/0x260 [hisi_sas_main] [ 4613.726618] sas_execute_internal_abort+0x144/0x310 [libsas] [ 4613.732976] sas_execute_internal_abort_dev+0x44/0x60 [libsas] [ 4613.739504] hisi_sas_internal_task_abort_dev.isra.0+0xbc/0x1b0 [hisi_sas_main] [ 4613.747499] hisi_sas_dev_gone+0x174/0x250 [hisi_sas_main] [ 4613.753682] sas_notify_lldd_dev_gone+0xec/0x2e0 [libsas] [ 4613.759781] sas_unregister_common_dev+0x4c/0x7a0 [libsas] [ 4613.765962] sas_destruct_devices+0xb8/0x120 [libsas] [ 4613.771709] sas_do_revalidate_domain.constprop.0+0x1b8/0x31c [libsas] [ 4613.778930] sas_revalidate_domain+0x60/0xa4 [libsas] [ 4613.784716] process_one_work+0x248/0x950 [ 4613.789424] worker_thread+0x318/0x934 [ 4613.793878] kthread+0x190/0x200 [ 4613.797810] ret_from_fork+0x10/0x18 [ 4613.802121] INFO: task kworker/u256:4:316722 blocked for more than 120 seconds. [ 4613.816026] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4613.824538] task:kworker/u256:4 state:D stack: 0 pid:316722 ppid: 2 flags:0x00000208 [ 4613.833670] Workqueue: 0000:74:02.0 hisi_sas_rst_work_handler [hisi_sas_main] [ 4613.841491] Call trace: [ 4613.844647] __switch_to+0xf8/0x17c [ 4613.848852] __schedule+0x660/0xee0 [ 4613.853052] schedule+0xac/0x240 [ 4613.856984] schedule_timeout+0x500/0x610 [ 4613.861695] __down+0x128/0x36c [ 4613.865542] down+0x240/0x2d0 [ 4613.869216] hisi_sas_controller_prereset+0x58/0x1fc [hisi_sas_main] [ 4613.876324] hisi_sas_rst_work_handler+0x40/0x8c [hisi_sas_main] [ 4613.883019] process_one_work+0x248/0x950 [ 4613.887732] worker_thread+0x318/0x934 [ 4613.892204] kthread+0x190/0x200 [ 4613.896118] ret_from_fork+0x10/0x18 [ 4613.900423] INFO: task kworker/u256:1:348985 blocked for more than 121 seconds. [ 4613.914341] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4613.922852] task:kworker/u256:1 state:D stack: 0 pid:348985 ppid: 2 flags:0x00000208 [ 4613.931984] Workqueue: 0000:74:02.0_event_q sas_port_event_worker [libsas] [ 4613.939549] Call trace: [ 4613.942702] __switch_to+0xf8/0x17c [ 4613.946892] __schedule+0x660/0xee0 [ 4613.951083] schedule+0xac/0x240 [ 4613.955015] schedule_timeout+0x500/0x610 [ 4613.959725] wait_for_common+0x200/0x610 [ 4613.964349] wait_for_completion+0x3c/0x5c [ 4613.969146] flush_workqueue+0x198/0x790 [ 4613.973776] sas_porte_broadcast_rcvd+0x1e8/0x320 [libsas] [ 4613.979960] sas_port_event_worker+0x54/0xa0 [libsas] [ 4613.985708] process_one_work+0x248/0x950 [ 4613.990420] worker_thread+0x318/0x934 [ 4613.994868] kthread+0x190/0x200 [ 4613.998800] ret_from_fork+0x10/0x18
This is because when the device goes offline, we obtain the hisi_hba semaphore and send the ABORT_DEV command to the device. However, the internal abort timed out due to the 2 bit ECC error and triggers automatic dump. In addition, since the hisi_hba semaphore has been obtained, the dump cannot be executed and the controller cannot be reset.
Therefore, the deadlocks occur on the following circular dependencies ---truncated---
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 27, 2026 | Jul 27, 2026 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernelUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-tools-libs | Oct 9, 2024 | Apr 17, 2024 |
| Suse | — | Upgrade dtb-amlogicUpgrade kernel-azure-extraUpgrade dtb-alteraUpgrade dlm-kmp-64kbUpgrade kernel-default-develUpgrade reiserfs-kmp-defaultUpgrade kernel-source-azureUpgrade kernel-docs-htmlUpgrade ocfs2-kmp-64kbUpgrade kernel-rt_debugUpgrade kernel-kvmsmallUpgrade kernel-develUpgrade kernel-macrosUpgrade kernel-default-baseUpgrade gfs2-kmp-rtUpgrade cluster-md-kmp-defaultUpgrade kernel-zfcpdumpUpgrade kernel-default-livepatchUpgrade cluster-md-kmp-rtUpgrade kernel-64kbUpgrade kernel-rt-develUpgrade kernel-kvmsmall-develUpgrade kernel-sourceUpgrade kernel-default-livepatch-develUpgrade kernel-default-extraUpgrade kernel-debug-develUpgrade kernel-devel-azureUpgrade dtb-amazonUpgrade kernel-debugUpgrade dtb-broadcomUpgrade dtb-freescaleUpgrade kernel-devel-rtUpgrade dtb-apmUpgrade dtb-lgUpgrade dtb-amdUpgrade kernel-symsUpgrade kernel-obs-qaUpgrade dtb-hisiliconUpgrade dtb-renesasUpgrade reiserfs-kmp-rtUpgrade dtb-socionextUpgrade dtb-xilinxUpgrade dtb-marvellUpgrade ocfs2-kmp-rtUpgrade ocfs2-kmp-azureUpgrade kernel-64kb-optionalUpgrade kernel-64kb-develUpgrade kernel-azure-optionalUpgrade kernel-default-optionalUpgrade dtb-mediatekUpgrade cluster-md-kmp-azureUpgrade kselftests-kmp-64kbUpgrade gfs2-kmp-64kbUpgrade dtb-appleUpgrade dtb-exynosUpgrade dtb-caviumUpgrade kernel-azure-develUpgrade dlm-kmp-azureUpgrade kernel-64kb-extraUpgrade kernel-syms-azureUpgrade kernel-rt_debug-develUpgrade kernel-docsUpgrade kernel-obs-buildUpgrade kselftests-kmp-defaultUpgrade kselftests-kmp-azureUpgrade kernel-default-vdsoUpgrade kernel-azureUpgrade dtb-armUpgrade kernel-kvmsmall-vdsoUpgrade dtb-qcomUpgrade gfs2-kmp-defaultUpgrade kernel-rt_debug-vdsoUpgrade kernel-default-base-rebuildUpgrade dtb-allwinnerUpgrade cluster-md-kmp-64kbUpgrade kernel-rt-vdsoUpgrade gfs2-kmp-azureUpgrade reiserfs-kmp-azureUpgrade kernel-rtUpgrade dlm-kmp-defaultUpgrade kernel-rt-extraUpgrade reiserfs-kmp-64kbUpgrade kernel-debug-vdsoUpgrade dlm-kmp-rtUpgrade kernel-syms-rtUpgrade ocfs2-kmp-defaultUpgrade kernel-azure-vdsoUpgrade kernel-defaultUpgrade dtb-nvidiaUpgrade kernel-source-vanillaUpgrade kernel-source-rtUpgrade dtb-sprdUpgrade dtb-rockchipUpgrade kernel-rt-livepatch-develUpgrade kernel-rt-optionalUpgrade kselftests-kmp-rt | Dec 5, 2025 | Jun 12, 2025 |
| Ubuntu | — | Upgrade linux-image-azureUpgrade linux-image-6.8.0-1005-raspiUpgrade linux-image-6.8.0-35-generic-64kUpgrade linux-image-oem-24.04Upgrade linux-image-6.8.0-35-lowlatencyUpgrade linux-image-virtualUpgrade linux-image-generic-64kUpgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-1009-awsUpgrade linux-image-genericUpgrade linux-image-gkeUpgrade linux-image-6.8.0-1008-azureUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1004-gkeUpgrade linux-image-ibmUpgrade linux-image-lowlatency-64kUpgrade linux-image-awsUpgrade linux-image-6.8.0-1006-oracleUpgrade linux-image-6.8.0-1006-oemUpgrade linux-image-kvmUpgrade linux-image-6.8.0-1008-azure-fdeUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-35-genericUpgrade linux-image-oracle-64kUpgrade linux-image-raspiUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-1008-gcpUpgrade linux-image-6.8.0-1006-ibmUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1006-oracle-64kUpgrade linux-image-gcpUpgrade linux-image-6.8.0-35-lowlatency-64kUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-oem-24.04aUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-ibm-classicUpgrade linux-image-oracle | Jul 1, 2024 | Apr 17, 2024 |
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