In the Linux kernel, the following vulnerability has been resolved:
optee: ffa: fix sleep in atomic context
The OP-TEE driver registers the function notif_callback() for FF-A notifications. However, this function is called in an atomic context leading to errors like this when processing asynchronous notifications:
| BUG: sleeping function called from invalid context at kernel/locking/mutex.c:258 | in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 9, name: kworker/0:0 | preempt_count: 1, expected: 0 | RCU nest depth: 0, expected: 0 | CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted 6.14.0-00019-g657536ebe0aa #13 | Hardware name: linux,dummy-virt (DT) | Workqueue: ffa_pcpu_irq_notification notif_pcpu_irq_work_fn | Call trace: | show_stack+0x18/0x24 (C) | dump_stack_lvl+0x78/0x90 | dump_stack+0x18/0x24 | __might_resched+0x114/0x170 | __might_sleep+0x48/0x98 | mutex_lock+0x24/0x80 | optee_get_msg_arg+0x7c/0x21c | simple_call_with_arg+0x50/0xc0 | optee_do_bottom_half+0x14/0x20 | notif_callback+0x3c/0x48 | handle_notif_callbacks+0x9c/0xe0 | notif_get_and_handle+0x40/0x88 | generic_exec_single+0x80/0xc0 | smp_call_function_single+0xfc/0x1a0 | notif_pcpu_irq_work_fn+0x2c/0x38 | process_one_work+0x14c/0x2b4 | worker_thread+0x2e4/0x3e0 | kthread+0x13c/0x210 | ret_from_fork+0x10/0x20
Fix this by adding work queue to process the notification in a non-atomic context.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Suse | — | Upgrade dtb-sprdUpgrade ocfs2-kmp-64kbUpgrade kernel-kvmsmallUpgrade dtb-marvellUpgrade kselftests-kmp-defaultUpgrade kernel-default-extraUpgrade dtb-socionextUpgrade dtb-amlogicUpgrade kernel-64kbUpgrade kernel-obs-qaUpgrade kernel-kvmsmall-vdsoUpgrade kernel-obs-buildUpgrade dtb-broadcomUpgrade kernel-rt-livepatch-develUpgrade dtb-nvidiaUpgrade dlm-kmp-defaultUpgrade dtb-freescaleUpgrade gfs2-kmp-rtUpgrade dtb-lgUpgrade kernel-rt-vdsoUpgrade kernel-docs-htmlUpgrade kselftests-kmp-rtUpgrade cluster-md-kmp-defaultUpgrade dtb-appleUpgrade kernel-docsUpgrade kernel-default-develUpgrade kernel-source-vanillaUpgrade kernel-rt-optionalUpgrade kernel-default-livepatchUpgrade dtb-amazonUpgrade ocfs2-kmp-rtUpgrade kernel-develUpgrade kernel-kvmsmall-develUpgrade dtb-amdUpgrade dtb-exynosUpgrade dtb-apmUpgrade ocfs2-kmp-defaultUpgrade dtb-hisiliconUpgrade kernel-64kb-optionalUpgrade dtb-renesasUpgrade kernel-default-optionalUpgrade dlm-kmp-64kbUpgrade kernel-defaultUpgrade dtb-allwinnerUpgrade dlm-kmp-rtUpgrade kernel-zfcpdumpUpgrade kernel-sourceUpgrade kernel-default-livepatch-develUpgrade dtb-xilinxUpgrade cluster-md-kmp-rtUpgrade dtb-caviumUpgrade dtb-alteraUpgrade kernel-symsUpgrade gfs2-kmp-defaultUpgrade gfs2-kmp-64kbUpgrade kernel-64kb-extraUpgrade dtb-qcomUpgrade kernel-rt-livepatchUpgrade kernel-rt-develUpgrade dtb-rockchipUpgrade kselftests-kmp-64kbUpgrade dtb-armUpgrade kernel-default-vdsoUpgrade dtb-mediatekUpgrade kernel-64kb-devel | Dec 5, 2025 | Nov 6, 2025 |
| Ubuntu | — | Upgrade linux-image-generic-64k-6.8Upgrade linux-image-6.14.0-34-genericUpgrade linux-image-6.8.0-1046-nvidia-lowlatencyUpgrade linux-image-6.14.0-1015-oracleUpgrade linux-image-generic-6.14Upgrade linux-image-6.8.0-1051-azureUpgrade linux-image-oem-22.04aUpgrade linux-image-aws-fipsUpgrade linux-image-realtime-6.8.1Upgrade linux-image-6.14.0-1014-oemUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-gke-6.8Upgrade linux-image-6.14.0-34-generic-64kUpgrade linux-image-azureUpgrade linux-image-6.8.0-100-lowlatencyUpgrade linux-image-oracle-6.8Upgrade linux-image-nvidiaUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-6.8.1-1041-realtimeUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-ibmUpgrade linux-image-realtime-6.14Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1046-nvidia-lowlatency-64kUpgrade linux-image-oem-22.04dUpgrade linux-image-aws-fips-6.8Upgrade linux-image-aws-lts-24.04Upgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-1047-gcp-64kUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-virtual-6.8Upgrade linux-image-6.8.0-1043-gkeUpgrade linux-image-generic-64kUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-oem-24.04cUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oracle-6.14Upgrade linux-image-6.8.0-1043-oracle-64kUpgrade linux-image-xilinx-6.8Upgrade linux-image-6.8.0-100-genericUpgrade linux-image-6.8.0-1047-gcpUpgrade linux-image-gcp-6.14Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-6.8.0-1046-awsUpgrade linux-image-oem-22.04cUpgrade linux-image-6.14.0-1014-azureUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-gcp-64k-6.14Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-azure-nvidiaUpgrade linux-image-gcp-fipsUpgrade linux-image-gkeopUpgrade linux-image-6.14.0-1016-raspiUpgrade linux-image-6.14.0-1015-awsUpgrade linux-image-azure-fipsUpgrade linux-image-6.8.0-1044-ibmUpgrade linux-image-lowlatency-6.8Upgrade linux-image-azure-6.14Upgrade linux-image-oracle-64k-6.14Upgrade linux-image-nvidia-6.8Upgrade linux-image-aws-6.8Upgrade linux-image-6.8.0-1043-gke-64kUpgrade linux-image-raspi-6.8Upgrade linux-image-raspiUpgrade linux-image-6.8.0-1047-raspiUpgrade linux-image-aws-64k-6.14Upgrade linux-image-6.14.0-1018-gcp-64kUpgrade linux-image-genericUpgrade linux-image-virtual-6.14Upgrade linux-image-gke-64kUpgrade linux-image-6.8.0-1023-xilinxUpgrade linux-image-kvmUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidia-64kUpgrade linux-image-gke-64k-6.8Upgrade linux-image-aws-6.14Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1043-oracleUpgrade linux-image-raspi-6.14Upgrade linux-image-6.8.0-1047-gcp-fipsUpgrade linux-image-azure-6.8Upgrade linux-image-lowlatencyUpgrade linux-image-generic-6.8Upgrade linux-image-azure-nvidia-6.14Upgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-1046-azure-fipsUpgrade linux-image-fips-6.8Upgrade linux-image-awsUpgrade linux-image-6.14.0-1014-realtimeUpgrade linux-image-oem-24.04bUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-ibm-classicUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gkeop-6.8Upgrade linux-image-oem-24.04Upgrade linux-image-fipsUpgrade linux-image-ibm-6.8Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-generic-lpaeUpgrade linux-image-aws-64kUpgrade linux-image-aws-64k-6.8Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-6.8.0-1046-aws-64kUpgrade linux-image-oem-24.04aUpgrade linux-image-6.8.0-2037-raspi-realtimeUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-xilinxUpgrade linux-image-azure-lts-24.04Upgrade linux-image-6.8.0-1046-aws-fipsUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-gkeUpgrade linux-image-virtualUpgrade linux-image-oracleUpgrade linux-image-oem-22.04bUpgrade linux-image-6.8.0-100-fipsUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-100-lowlatency-64kUpgrade linux-image-6.8.0-1046-nvidia-64kUpgrade linux-image-6.14.0-1015-oracle-64kUpgrade linux-image-6.8.0-1046-nvidiaUpgrade linux-image-gcpUpgrade linux-image-generic-64k-6.14Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-oem-6.14Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-6.14.0-1007-azure-nvidiaUpgrade linux-image-6.14.0-1015-aws-64kUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-azure-fips-6.8Upgrade linux-image-6.8.0-100-generic-64kUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-intel-iotgUpgrade linux-image-gcp-6.8Upgrade linux-image-6.8.0-1030-gkeopUpgrade linux-image-6.14.0-1018-gcpUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-6.8.0-1046-azureUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-realtimeUpgrade linux-image-lowlatency-64k | Jul 31, 2025 | Jul 25, 2025 |
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