In the Linux kernel, the following vulnerability has been resolved:
sched/numa: Fix the potential null pointer dereference in task_numa_work()
When running stress-ng-vm-segv test, we found a null pointer dereference error in task_numa_work(). Here is the backtrace:
[323676.066985] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 ...... [323676.067108] CPU: 35 PID: 2694524 Comm: stress-ng-vm-se ...... [323676.067113] pstate: 23401009 (nzCv daif +PAN -UAO +TCO +DIT +SSBS BTYPE=--) [323676.067115] pc : vma_migratable+0x1c/0xd0 [323676.067122] lr : task_numa_work+0x1ec/0x4e0 [323676.067127] sp : ffff8000ada73d20 [323676.067128] x29: ffff8000ada73d20 x28: 0000000000000000 x27: 000000003e89f010 [323676.067130] x26: 0000000000080000 x25: ffff800081b5c0d8 x24: ffff800081b27000 [323676.067133] x23: 0000000000010000 x22: 0000000104d18cc0 x21: ffff0009f7158000 [323676.067135] x20: 0000000000000000 x19: 0000000000000000 x18: ffff8000ada73db8 [323676.067138] x17: 0001400000000000 x16: ffff800080df40b0 x15: 0000000000000035 [323676.067140] x14: ffff8000ada73cc8 x13: 1fffe0017cc72001 x12: ffff8000ada73cc8 [323676.067142] x11: ffff80008001160c x10: ffff000be639000c x9 : ffff8000800f4ba4 [323676.067145] x8 : ffff000810375000 x7 : ffff8000ada73974 x6 : 0000000000000001 [323676.067147] x5 : 0068000b33e26707 x4 : 0000000000000001 x3 : ffff0009f7158000 [323676.067149] x2 : 0000000000000041 x1 : 0000000000004400 x0 : 0000000000000000 [323676.067152] Call trace: [323676.067153] vma_migratable+0x1c/0xd0 [323676.067155] task_numa_work+0x1ec/0x4e0 [323676.067157] task_work_run+0x78/0xd8 [323676.067161] do_notify_resume+0x1ec/0x290 [323676.067163] el0_svc+0x150/0x160 [323676.067167] el0t_64_sync_handler+0xf8/0x128 [323676.067170] el0t_64_sync+0x17c/0x180 [323676.067173] Code: d2888001 910003fd f9000bf3 aa0003f3 (f9401000) [323676.067177] SMP: stopping secondary CPUs [323676.070184] Starting crashdump kernel...
stress-ng-vm-segv in stress-ng is used to stress test the SIGSEGV error handling function of the system, which tries to cause a SIGSEGV error on return from unmapping the whole address space of the child process.
Normally this program will not cause kernel crashes. But before the munmap system call returns to user mode, a potential task_numa_work() for numa balancing could be added and executed. In this scenario, since the child process has no vma after munmap, the vma_next() in task_numa_work() will return a null pointer even if the vma iterator restarts from 0.
Recheck the vma pointer before dereferencing it in task_numa_work().
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-debug-modulesUpgrade kernel-debug-develUpgrade kernel-rt-modulesUpgrade kernel-uki-virtUpgrade kernel-64k-debug-modulesUpgrade kernel-debug-modules-coreUpgrade kernel-rt-coreUpgrade kernel-develUpgrade kernel-docUpgrade kernel-zfcpdumpUpgrade kernel-64k-modules-coreUpgrade kernel-modules-coreUpgrade python3-perfUpgrade kernel-coreUpgrade kernel-modulesUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-debugUpgrade kernel-debug-coreUpgrade kernel-rt-debug-modules-extraUpgrade kernel-tools-libsUpgrade kernel-headersUpgrade kernel-rt-debugUpgrade rtlaUpgrade kernel-modules-extraUpgrade kernel-rt-debug-develUpgrade kernel-zfcpdump-develUpgrade kernel-rt-debug-modulesUpgrade kernel-debug-uki-virtUpgrade kernel-rt-debug-modules-coreUpgrade kernel-64k-debug-develUpgrade kernel-rt-develUpgrade kernel-64k-develUpgrade perfUpgrade kernel-debug-modules-extraUpgrade kernel-64k-devel-matchedUpgrade kernel-devel-matchedUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-rt-modules-coreUpgrade kernel-zfcpdump-devel-matchedUpgrade bpftoolUpgrade kernel-tools-libs-develUpgrade kernel-64k-modules-extraUpgrade kernel-rtUpgrade kernel-64kUpgrade kernel-debug-devel-matchedUpgrade kernel-64k-debugUpgrade kernel-uki-virt-addonsUpgrade kernel-cross-headersUpgrade kernel-64k-debug-modules-coreUpgrade libperfUpgrade kernel-zfcpdump-modulesUpgrade kernel-toolsUpgrade kernel-rt-debug-coreUpgrade kernel-zfcpdump-coreUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade rvUpgrade kernel-64k-coreUpgrade kernel-rt-modules-extraUpgrade kernel-64k-modulesUpgrade kernel-64k-debug-modules-extraUpgrade kernel-64k-debug-devel-matchedUpgrade kernel-64k-debug-core | Jan 14, 2025 | Nov 9, 2024 |
| Debian | — | Upgrade linux | Jul 27, 2026 | Jul 27, 2026 |
| Oracle_linux | — | Upgrade kernel | Jan 7, 2025 | Nov 9, 2024 |
| Redhat_linux | — | Upgrade kernelUpgrade kernel-rtNo solution exists | Feb 10, 2025 | Nov 9, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1026-nvidia-lowlatency-64kUpgrade linux-image-virtualUpgrade linux-image-ibmUpgrade linux-image-oem-22.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oem-22.04aUpgrade linux-image-lowlatencyUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-raspi-realtimeUpgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-6.8.0-1026-nvidiaUpgrade linux-image-gcpUpgrade linux-image-generic-64kUpgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-6.8.0-58-lowlatency-64kUpgrade linux-image-genericUpgrade linux-image-oem-24.04bUpgrade linux-image-6.11.0-1005-realtimeUpgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-6.8.1-1020-realtimeUpgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-6.8.0-58-lowlatencyUpgrade linux-image-gkeop-6.8Upgrade linux-image-gkeopUpgrade linux-image-6.8.0-1026-nvidia-lowlatencyUpgrade linux-image-6.8.0-1027-awsUpgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-azure-nvidiaUpgrade linux-image-nvidiaUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-ibm-classicUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-oracleUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.11.0-1009-azureUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1024-oracle-64kUpgrade linux-image-generic-lpaeUpgrade linux-image-azure-lts-24.04Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-6.8.0-1028-gcpUpgrade linux-image-awsUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-nvidia-64kUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-aws-lts-24.04Upgrade linux-image-raspiUpgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oracle-64kUpgrade linux-image-kvmUpgrade linux-image-gkeUpgrade linux-image-6.8.0-58-genericUpgrade linux-image-6.8.0-1026-oemUpgrade linux-image-6.8.0-1024-oracleUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-1010-gkeopUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-realtimeUpgrade linux-image-oem-22.04bUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-6.8.0-1023-gkeUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-oem-24.04Upgrade linux-image-oem-22.04dUpgrade linux-image-gcp-64kUpgrade linux-image-azureUpgrade linux-image-6.8.0-1027-azureUpgrade linux-image-6.8.0-1024-ibmUpgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-oem-22.04cUpgrade linux-image-6.11.0-1015-oemUpgrade linux-image-6.11.0-1009-awsUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-oem-24.04aUpgrade linux-image-6.11.0-18-genericUpgrade linux-image-6.8.0-58-generic-64kUpgrade linux-image-nvidia-6.8Upgrade linux-image-6.8.0-1027-azure-fdeUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.8.0-1026-nvidia-64kUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-1028-gcp-64k | Feb 20, 2025 | Nov 9, 2024 |
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