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-uki-virtUpgrade kernel-docUpgrade kernel-modules-coreUpgrade kernel-debug-coreUpgrade kernel-64k-debug-develUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-64k-develUpgrade python3-perfUpgrade kernel-coreUpgrade kernel-debug-uki-virtUpgrade kernel-rt-develUpgrade kernel-rt-debugUpgrade kernel-rt-coreUpgrade kernel-zfcpdump-develUpgrade kernel-64k-modules-coreUpgrade rtlaUpgrade kernel-debugUpgrade kernel-headersUpgrade kernel-tools-libsUpgrade kernel-64k-debug-modulesUpgrade kernel-rt-debug-develUpgrade kernel-develUpgrade kernel-debug-modulesUpgrade kernel-modulesUpgrade kernel-zfcpdumpUpgrade kernel-rt-modulesUpgrade kernel-debug-modules-coreUpgrade kernel-rt-debug-modules-coreUpgrade kernel-debug-develUpgrade kernel-modules-extraUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-debug-modulesUpgrade kernel-64k-coreUpgrade kernel-zfcpdump-modules-coreUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernel-cross-headersUpgrade kernel-rt-debug-coreUpgrade kernel-64k-debug-devel-matchedUpgrade kernel-devel-matchedUpgrade kernelUpgrade kernel-64kUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-64k-debug-modules-coreUpgrade kernel-zfcpdump-coreUpgrade libperfUpgrade kernel-zfcpdump-modulesUpgrade kernel-debug-modules-extraUpgrade kernel-64k-debugUpgrade kernel-rtUpgrade kernel-toolsUpgrade kernel-tools-libs-develUpgrade rvUpgrade kernel-64k-modulesUpgrade kernel-64k-debug-modules-extraUpgrade kernel-rt-modules-extraUpgrade kernel-rt-modules-coreUpgrade kernel-64k-devel-matchedUpgrade kernel-64k-debug-coreUpgrade kernel-debug-devel-matchedUpgrade kernel-64k-modules-extraUpgrade perfUpgrade kernel-uki-virt-addons | 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-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-58-lowlatencyUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-genericUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.8.0-1026-nvidia-lowlatency-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1026-nvidia-lowlatencyUpgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-azure-nvidiaUpgrade linux-image-gkeopUpgrade linux-image-oracleUpgrade linux-image-6.11.0-1005-realtimeUpgrade linux-image-ibmUpgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-oem-24.04bUpgrade linux-image-6.11.0-1009-azureUpgrade linux-image-6.8.0-58-lowlatency-64kUpgrade linux-image-oem-22.04Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-6.8.1-1020-realtimeUpgrade linux-image-azure-lts-24.04Upgrade linux-image-6.8.0-1024-oracle-64kUpgrade linux-image-6.8.0-1026-nvidiaUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-oem-22.04aUpgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-azure-fdeUpgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-1027-awsUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-nvidiaUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-1028-gcpUpgrade linux-image-raspi-realtimeUpgrade linux-image-gcpUpgrade linux-image-virtualUpgrade linux-image-oem-22.04dUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-oracle-64kUpgrade linux-image-oem-22.04bUpgrade linux-image-6.11.0-1009-awsUpgrade linux-image-oem-22.04cUpgrade linux-image-oem-24.04aUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-6.8.0-1024-ibmUpgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-1027-azureUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-realtimeUpgrade linux-image-6.8.0-1026-nvidia-64kUpgrade linux-image-aws-lts-24.04Upgrade linux-image-raspiUpgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-1028-gcp-64kUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1024-oracleUpgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-6.8.0-58-genericUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-kvmUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-1023-gkeUpgrade linux-image-6.8.0-1026-oemUpgrade linux-image-nvidia-6.8Upgrade linux-image-6.11.0-1015-oemUpgrade linux-image-6.8.0-58-generic-64kUpgrade linux-image-6.8.0-1027-azure-fdeUpgrade linux-image-6.11.0-18-genericUpgrade linux-image-nvidia-64kUpgrade linux-image-awsUpgrade linux-image-6.8.0-1010-gkeopUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-azureUpgrade linux-image-gkeUpgrade linux-image-oem-24.04Upgrade linux-image-virtual-hwe-22.04 | Feb 20, 2025 | Nov 9, 2024 |
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