CVE-2023-53789
Description
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Improve page fault error reporting If IOMMU domain for device group is not setup properly then we may hit IOMMU page fault. Current page fault handler assumes that domain is always setup and it will hit NULL pointer derefence (see below sample log). Lets check whether domain is setup or not and log appropriate message. Sample log: ---------- amdgpu 0000:00:01.0: amdgpu: SE 1, SH per SE 1, CU per SH 8, active_cu_number 6 BUG: kernel NULL pointer dereference, address: 0000000000000058 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 2 PID: 56 Comm: irq/24-AMD-Vi Not tainted 6.2.0-rc2+ #89 Hardware name: xxx RIP: 0010:report_iommu_fault+0x11/0x90 [...] Call Trace: <TASK> amd_iommu_int_thread+0x60c/0x760 ? __pfx_irq_thread_fn+0x10/0x10 irq_thread_fn+0x1f/0x60 irq_thread+0xea/0x1a0 ? preempt_count_add+0x6a/0xa0 ? __pfx_irq_thread_dtor+0x10/0x10 ? __pfx_irq_thread+0x10/0x10 kthread+0xe9/0x110 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2c/0x50 </TASK> [joro: Edit commit message]
How to fix
- Linux Linuxbe8301e2d5a8b95c04ae8e35d7bfee7b0f03f83a, 446080b353f048b1fddaec1434cb3d27b5de7efe, 996d120b4de2b0d6b592bd9fbbe6e244b81ab3cc or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 9f78e446bde812d18f228976f2c6b8f25b93f08b ≤ v < be8301e2d5a8b95c04ae8e35d7bfee7b0f03f83a, 9f78e446bde812d18f228976f2c6b8f25b93f08b ≤ v < 446080b353f048b1fddaec1434cb3d27b5de7efe, 9f78e446bde812d18f228976f2c6b8f25b93f08b ≤ v < 996d120b4de2b0d6b592bd9fbbe6e244b81ab3cc, 5.16 | be8301e2d5a8b95c04ae8e35d7bfee7b0f03f83a, 446080b353f048b1fddaec1434cb3d27b5de7efe, 996d120b4de2b0d6b592bd9fbbe6e244b81ab3cc |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.