github - ghsa-qv4f-mr6g-r994

GHSA-QV4F-MR6G-R994

Vulnerability from github – Published: 2025-04-18 15:31 – Updated: 2025-11-04 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: Replace Mutex with Spinlock for RLCG register access to avoid Priority Inversion in SRIOV

RLCG Register Access is a way for virtual functions to safely access GPU registers in a virtualized environment., including TLB flushes and register reads. When multiple threads or VFs try to access the same registers simultaneously, it can lead to race conditions. By using the RLCG interface, the driver can serialize access to the registers. This means that only one thread can access the registers at a time, preventing conflicts and ensuring that operations are performed correctly. Additionally, when a low-priority task holds a mutex that a high-priority task needs, ie., If a thread holding a spinlock tries to acquire a mutex, it can lead to priority inversion. register access in amdgpu_virt_rlcg_reg_rw especially in a fast code path is critical.

The call stack shows that the function amdgpu_virt_rlcg_reg_rw is being called, which attempts to acquire the mutex. This function is invoked from amdgpu_sriov_wreg, which in turn is called from gmc_v11_0_flush_gpu_tlb.

The [ BUG: Invalid wait context ] indicates that a thread is trying to acquire a mutex while it is in a context that does not allow it to sleep (like holding a spinlock).

Fixes the below:

[ 253.013423] ============================= [ 253.013434] [ BUG: Invalid wait context ] [ 253.013446] 6.12.0-amdstaging-drm-next-lol-050225 #14 Tainted: G U OE [ 253.013464] ----------------------------- [ 253.013475] kworker/0:1/10 is trying to lock: [ 253.013487] ffff9f30542e3cf8 (&adev->virt.rlcg_reg_lock){+.+.}-{3:3}, at: amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu] [ 253.013815] other info that might help us debug this: [ 253.013827] context-{4:4} [ 253.013835] 3 locks held by kworker/0:1/10: [ 253.013847] #0: ffff9f3040050f58 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x3f5/0x680 [ 253.013877] #1: ffffb789c008be40 ((work_completion)(&wfc.work)){+.+.}-{0:0}, at: process_one_work+0x1d6/0x680 [ 253.013905] #2: ffff9f3054281838 (&adev->gmc.invalidate_lock){+.+.}-{2:2}, at: gmc_v11_0_flush_gpu_tlb+0x198/0x4f0 [amdgpu] [ 253.014154] stack backtrace: [ 253.014164] CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G U OE 6.12.0-amdstaging-drm-next-lol-050225 #14 [ 253.014189] Tainted: [U]=USER, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE [ 253.014203] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 11/18/2024 [ 253.014224] Workqueue: events work_for_cpu_fn [ 253.014241] Call Trace: [ 253.014250] [ 253.014260] dump_stack_lvl+0x9b/0xf0 [ 253.014275] dump_stack+0x10/0x20 [ 253.014287] __lock_acquire+0xa47/0x2810 [ 253.014303] ? srso_alias_return_thunk+0x5/0xfbef5 [ 253.014321] lock_acquire+0xd1/0x300 [ 253.014333] ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu] [ 253.014562] ? __lock_acquire+0xa6b/0x2810 [ 253.014578] __mutex_lock+0x85/0xe20 [ 253.014591] ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu] [ 253.014782] ? sched_clock_noinstr+0x9/0x10 [ 253.014795] ? srso_alias_return_thunk+0x5/0xfbef5 [ 253.014808] ? local_clock_noinstr+0xe/0xc0 [ 253.014822] ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu] [ 253.015012] ? srso_alias_return_thunk+0x5/0xfbef5 [ 253.015029] mutex_lock_nested+0x1b/0x30 [ 253.015044] ? mutex_lock_nested+0x1b/0x30 [ 253.015057] amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu] [ 253.015249] amdgpu_sriov_wreg+0xc5/0xd0 [amdgpu] [ 253.015435] gmc_v11_0_flush_gpu_tlb+0x44b/0x4f0 [amdgpu] [ 253.015667] gfx_v11_0_hw_init+0x499/0x29c0 [amdgpu] [ 253.015901] ? __pfx_smu_v13_0_update_pcie_parameters+0x10/0x10 [amdgpu] [ 253.016159] ? srso_alias_return_thunk+0x5/0xfbef5 [ 253.016173] ? smu_hw_init+0x18d/0x300 [amdgpu] [ 253.016403] amdgpu_device_init+0x29ad/0x36a0 [amdgpu] [ 253.016614] amdgpu_driver_load_kms+0x1a/0xc0 [amdgpu] [ 253.0170 ---truncated---

Severity ?

4.7 (Medium)


                  
                    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38104"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-18T07:15:43Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Replace Mutex with Spinlock for RLCG register access to avoid Priority Inversion in SRIOV\n\nRLCG Register Access is a way for virtual functions to safely access GPU\nregisters in a virtualized environment., including TLB flushes and\nregister reads. When multiple threads or VFs try to access the same\nregisters simultaneously, it can lead to race conditions. By using the\nRLCG interface, the driver can serialize access to the registers. This\nmeans that only one thread can access the registers at a time,\npreventing conflicts and ensuring that operations are performed\ncorrectly. Additionally, when a low-priority task holds a mutex that a\nhigh-priority task needs, ie., If a thread holding a spinlock tries to\nacquire a mutex, it can lead to priority inversion. register access in\namdgpu_virt_rlcg_reg_rw especially in a fast code path is critical.\n\nThe call stack shows that the function amdgpu_virt_rlcg_reg_rw is being\ncalled, which attempts to acquire the mutex. This function is invoked\nfrom amdgpu_sriov_wreg, which in turn is called from\ngmc_v11_0_flush_gpu_tlb.\n\nThe [ BUG: Invalid wait context ] indicates that a thread is trying to\nacquire a mutex while it is in a context that does not allow it to sleep\n(like holding a spinlock).\n\nFixes the below:\n\n[  253.013423] =============================\n[  253.013434] [ BUG: Invalid wait context ]\n[  253.013446] 6.12.0-amdstaging-drm-next-lol-050225 #14 Tainted: G     U     OE\n[  253.013464] -----------------------------\n[  253.013475] kworker/0:1/10 is trying to lock:\n[  253.013487] ffff9f30542e3cf8 (\u0026adev-\u003evirt.rlcg_reg_lock){+.+.}-{3:3}, at: amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[  253.013815] other info that might help us debug this:\n[  253.013827] context-{4:4}\n[  253.013835] 3 locks held by kworker/0:1/10:\n[  253.013847]  #0: ffff9f3040050f58 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x3f5/0x680\n[  253.013877]  #1: ffffb789c008be40 ((work_completion)(\u0026wfc.work)){+.+.}-{0:0}, at: process_one_work+0x1d6/0x680\n[  253.013905]  #2: ffff9f3054281838 (\u0026adev-\u003egmc.invalidate_lock){+.+.}-{2:2}, at: gmc_v11_0_flush_gpu_tlb+0x198/0x4f0 [amdgpu]\n[  253.014154] stack backtrace:\n[  253.014164] CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G     U     OE      6.12.0-amdstaging-drm-next-lol-050225 #14\n[  253.014189] Tainted: [U]=USER, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\n[  253.014203] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 11/18/2024\n[  253.014224] Workqueue: events work_for_cpu_fn\n[  253.014241] Call Trace:\n[  253.014250]  \u003cTASK\u003e\n[  253.014260]  dump_stack_lvl+0x9b/0xf0\n[  253.014275]  dump_stack+0x10/0x20\n[  253.014287]  __lock_acquire+0xa47/0x2810\n[  253.014303]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  253.014321]  lock_acquire+0xd1/0x300\n[  253.014333]  ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[  253.014562]  ? __lock_acquire+0xa6b/0x2810\n[  253.014578]  __mutex_lock+0x85/0xe20\n[  253.014591]  ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[  253.014782]  ? sched_clock_noinstr+0x9/0x10\n[  253.014795]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  253.014808]  ? local_clock_noinstr+0xe/0xc0\n[  253.014822]  ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[  253.015012]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  253.015029]  mutex_lock_nested+0x1b/0x30\n[  253.015044]  ? mutex_lock_nested+0x1b/0x30\n[  253.015057]  amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[  253.015249]  amdgpu_sriov_wreg+0xc5/0xd0 [amdgpu]\n[  253.015435]  gmc_v11_0_flush_gpu_tlb+0x44b/0x4f0 [amdgpu]\n[  253.015667]  gfx_v11_0_hw_init+0x499/0x29c0 [amdgpu]\n[  253.015901]  ? __pfx_smu_v13_0_update_pcie_parameters+0x10/0x10 [amdgpu]\n[  253.016159]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  253.016173]  ? smu_hw_init+0x18d/0x300 [amdgpu]\n[  253.016403]  amdgpu_device_init+0x29ad/0x36a0 [amdgpu]\n[  253.016614]  amdgpu_driver_load_kms+0x1a/0xc0 [amdgpu]\n[  253.0170\n---truncated---",
  "id": "GHSA-qv4f-mr6g-r994",
  "modified": "2025-11-04T18:31:32Z",
  "published": "2025-04-18T15:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38104"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07ed75bfa7ede8bfcfa303fd6efc85db1c8684c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c0378830e42c98acd69e0289882c8637d92f285"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5c1741a0c176ae11675a64cb7f2dd21d72db6b91"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc0297f3198bd60108ccbd167ee5d9fa4af31ed0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-38104 (GCVE-0-2025-38104)

Vulnerability from cvelistv5 – Published: 2025-04-18 07:01 – Updated: 2025-07-17 16:55

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Replace Mutex with Spinlock for RLCG register access to avoid Priority Inversion in SRIOV RLCG Register Access is a way for virtual functions to safely access GPU registers in a virtualized environment., including TLB flushes and register reads. When multiple threads or VFs try to access the same registers simultaneously, it can lead to race conditions. By using the RLCG interface, the driver can serialize access to the registers. This means that only one thread can access the registers at a time, preventing conflicts and ensuring that operations are performed correctly. Additionally, when a low-priority task holds a mutex that a high-priority task needs, ie., If a thread holding a spinlock tries to acquire a mutex, it can lead to priority inversion. register access in amdgpu_virt_rlcg_reg_rw especially in a fast code path is critical. The call stack shows that the function amdgpu_virt_rlcg_reg_rw is being called, which attempts to acquire the mutex. This function is invoked from amdgpu_sriov_wreg, which in turn is called from gmc_v11_0_flush_gpu_tlb. The [ BUG: Invalid wait context ] indicates that a thread is trying to acquire a mutex while it is in a context that does not allow it to sleep (like holding a spinlock). Fixes the below: [ 253.013423] ============================= [ 253.013434] [ BUG: Invalid wait context ] [ 253.013446] 6.12.0-amdstaging-drm-next-lol-050225 #14 Tainted: G U OE [ 253.013464] ----------------------------- [ 253.013475] kworker/0:1/10 is trying to lock: [ 253.013487] ffff9f30542e3cf8 (&adev->virt.rlcg_reg_lock){+.+.}-{3:3}, at: amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu] [ 253.013815] other info that might help us debug this: [ 253.013827] context-{4:4} [ 253.013835] 3 locks held by kworker/0:1/10: [ 253.013847] #0: ffff9f3040050f58 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x3f5/0x680 [ 253.013877] #1: ffffb789c008be40 ((work_completion)(&wfc.work)){+.+.}-{0:0}, at: process_one_work+0x1d6/0x680 [ 253.013905] #2: ffff9f3054281838 (&adev->gmc.invalidate_lock){+.+.}-{2:2}, at: gmc_v11_0_flush_gpu_tlb+0x198/0x4f0 [amdgpu] [ 253.014154] stack backtrace: [ 253.014164] CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G U OE 6.12.0-amdstaging-drm-next-lol-050225 #14 [ 253.014189] Tainted: [U]=USER, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE [ 253.014203] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 11/18/2024 [ 253.014224] Workqueue: events work_for_cpu_fn [ 253.014241] Call Trace: [ 253.014250] <TASK> [ 253.014260] dump_stack_lvl+0x9b/0xf0 [ 253.014275] dump_stack+0x10/0x20 [ 253.014287] __lock_acquire+0xa47/0x2810 [ 253.014303] ? srso_alias_return_thunk+0x5/0xfbef5 [ 253.014321] lock_acquire+0xd1/0x300 [ 253.014333] ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu] [ 253.014562] ? __lock_acquire+0xa6b/0x2810 [ 253.014578] __mutex_lock+0x85/0xe20 [ 253.014591] ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu] [ 253.014782] ? sched_clock_noinstr+0x9/0x10 [ 253.014795] ? srso_alias_return_thunk+0x5/0xfbef5 [ 253.014808] ? local_clock_noinstr+0xe/0xc0 [ 253.014822] ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu] [ 253.015012] ? srso_alias_return_thunk+0x5/0xfbef5 [ 253.015029] mutex_lock_nested+0x1b/0x30 [ 253.015044] ? mutex_lock_nested+0x1b/0x30 [ 253.015057] amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu] [ 253.015249] amdgpu_sriov_wreg+0xc5/0xd0 [amdgpu] [ 253.015435] gmc_v11_0_flush_gpu_tlb+0x44b/0x4f0 [amdgpu] [ 253.015667] gfx_v11_0_hw_init+0x499/0x29c0 [amdgpu] [ 253.015901] ? __pfx_smu_v13_0_update_pcie_parameters+0x10/0x10 [amdgpu] [ 253.016159] ? srso_alias_return_thunk+0x5/0xfbef5 [ 253.016173] ? smu_hw_init+0x18d/0x300 [amdgpu] [ 253.016403] amdgpu_device_init+0x29ad/0x36a0 [amdgpu] [ 253.016614] amdgpu_driver_load_kms+0x1a/0xc0 [amdgpu] [ 253.0170 ---truncated---

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/07ed75bfa7ede8bfc…
	https://git.kernel.org/stable/c/1c0378830e42c98ac…
	https://git.kernel.org/stable/c/5c1741a0c176ae116…
	https://git.kernel.org/stable/c/dc0297f3198bd6010…

Impacted products

Vendor

Product

Version

Linux

Affected: e864180ee49b4d30e640fd1e1d852b86411420c9 , < 07ed75bfa7ede8bfcfa303fd6efc85db1c8684c7 (git)
Affected: e864180ee49b4d30e640fd1e1d852b86411420c9 , < 1c0378830e42c98acd69e0289882c8637d92f285 (git)
Affected: e864180ee49b4d30e640fd1e1d852b86411420c9 , < 5c1741a0c176ae11675a64cb7f2dd21d72db6b91 (git)
Affected: e864180ee49b4d30e640fd1e1d852b86411420c9 , < dc0297f3198bd60108ccbd167ee5d9fa4af31ed0 (git)
Affected: f39a3bc42815a7016a915f6cb35e9a1448788f06 (git)
Affected: 1adb5ebe205e96af77a93512e2d5b8c437548787 (git)
Affected: e1ab38e99d1607f80a1670a399511a56464c0253 (git)

Linux

Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.39 , ≤ 6.12.* (semver)
Unaffected: 6.13.11 , ≤ 6.13.* (semver)
Unaffected: 6.14.2 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_device.c",
            "drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c",
            "drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "07ed75bfa7ede8bfcfa303fd6efc85db1c8684c7",
              "status": "affected",
              "version": "e864180ee49b4d30e640fd1e1d852b86411420c9",
              "versionType": "git"
            },
            {
              "lessThan": "1c0378830e42c98acd69e0289882c8637d92f285",
              "status": "affected",
              "version": "e864180ee49b4d30e640fd1e1d852b86411420c9",
              "versionType": "git"
            },
            {
              "lessThan": "5c1741a0c176ae11675a64cb7f2dd21d72db6b91",
              "status": "affected",
              "version": "e864180ee49b4d30e640fd1e1d852b86411420c9",
              "versionType": "git"
            },
            {
              "lessThan": "dc0297f3198bd60108ccbd167ee5d9fa4af31ed0",
              "status": "affected",
              "version": "e864180ee49b4d30e640fd1e1d852b86411420c9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f39a3bc42815a7016a915f6cb35e9a1448788f06",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1adb5ebe205e96af77a93512e2d5b8c437548787",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e1ab38e99d1607f80a1670a399511a56464c0253",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_device.c",
            "drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c",
            "drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.39",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.11",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14.2",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.1.105",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.6.46",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.10.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Replace Mutex with Spinlock for RLCG register access to avoid Priority Inversion in SRIOV\n\nRLCG Register Access is a way for virtual functions to safely access GPU\nregisters in a virtualized environment., including TLB flushes and\nregister reads. When multiple threads or VFs try to access the same\nregisters simultaneously, it can lead to race conditions. By using the\nRLCG interface, the driver can serialize access to the registers. This\nmeans that only one thread can access the registers at a time,\npreventing conflicts and ensuring that operations are performed\ncorrectly. Additionally, when a low-priority task holds a mutex that a\nhigh-priority task needs, ie., If a thread holding a spinlock tries to\nacquire a mutex, it can lead to priority inversion. register access in\namdgpu_virt_rlcg_reg_rw especially in a fast code path is critical.\n\nThe call stack shows that the function amdgpu_virt_rlcg_reg_rw is being\ncalled, which attempts to acquire the mutex. This function is invoked\nfrom amdgpu_sriov_wreg, which in turn is called from\ngmc_v11_0_flush_gpu_tlb.\n\nThe [ BUG: Invalid wait context ] indicates that a thread is trying to\nacquire a mutex while it is in a context that does not allow it to sleep\n(like holding a spinlock).\n\nFixes the below:\n\n[  253.013423] =============================\n[  253.013434] [ BUG: Invalid wait context ]\n[  253.013446] 6.12.0-amdstaging-drm-next-lol-050225 #14 Tainted: G     U     OE\n[  253.013464] -----------------------------\n[  253.013475] kworker/0:1/10 is trying to lock:\n[  253.013487] ffff9f30542e3cf8 (\u0026adev-\u003evirt.rlcg_reg_lock){+.+.}-{3:3}, at: amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[  253.013815] other info that might help us debug this:\n[  253.013827] context-{4:4}\n[  253.013835] 3 locks held by kworker/0:1/10:\n[  253.013847]  #0: ffff9f3040050f58 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x3f5/0x680\n[  253.013877]  #1: ffffb789c008be40 ((work_completion)(\u0026wfc.work)){+.+.}-{0:0}, at: process_one_work+0x1d6/0x680\n[  253.013905]  #2: ffff9f3054281838 (\u0026adev-\u003egmc.invalidate_lock){+.+.}-{2:2}, at: gmc_v11_0_flush_gpu_tlb+0x198/0x4f0 [amdgpu]\n[  253.014154] stack backtrace:\n[  253.014164] CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G     U     OE      6.12.0-amdstaging-drm-next-lol-050225 #14\n[  253.014189] Tainted: [U]=USER, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\n[  253.014203] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 11/18/2024\n[  253.014224] Workqueue: events work_for_cpu_fn\n[  253.014241] Call Trace:\n[  253.014250]  \u003cTASK\u003e\n[  253.014260]  dump_stack_lvl+0x9b/0xf0\n[  253.014275]  dump_stack+0x10/0x20\n[  253.014287]  __lock_acquire+0xa47/0x2810\n[  253.014303]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  253.014321]  lock_acquire+0xd1/0x300\n[  253.014333]  ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[  253.014562]  ? __lock_acquire+0xa6b/0x2810\n[  253.014578]  __mutex_lock+0x85/0xe20\n[  253.014591]  ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[  253.014782]  ? sched_clock_noinstr+0x9/0x10\n[  253.014795]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  253.014808]  ? local_clock_noinstr+0xe/0xc0\n[  253.014822]  ? amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[  253.015012]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  253.015029]  mutex_lock_nested+0x1b/0x30\n[  253.015044]  ? mutex_lock_nested+0x1b/0x30\n[  253.015057]  amdgpu_virt_rlcg_reg_rw+0xf6/0x330 [amdgpu]\n[  253.015249]  amdgpu_sriov_wreg+0xc5/0xd0 [amdgpu]\n[  253.015435]  gmc_v11_0_flush_gpu_tlb+0x44b/0x4f0 [amdgpu]\n[  253.015667]  gfx_v11_0_hw_init+0x499/0x29c0 [amdgpu]\n[  253.015901]  ? __pfx_smu_v13_0_update_pcie_parameters+0x10/0x10 [amdgpu]\n[  253.016159]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  253.016173]  ? smu_hw_init+0x18d/0x300 [amdgpu]\n[  253.016403]  amdgpu_device_init+0x29ad/0x36a0 [amdgpu]\n[  253.016614]  amdgpu_driver_load_kms+0x1a/0xc0 [amdgpu]\n[  253.0170\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-17T16:55:36.648Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/07ed75bfa7ede8bfcfa303fd6efc85db1c8684c7"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c0378830e42c98acd69e0289882c8637d92f285"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c1741a0c176ae11675a64cb7f2dd21d72db6b91"
        },
        {
          "url": "https://git.kernel.org/stable/c/dc0297f3198bd60108ccbd167ee5d9fa4af31ed0"
        }
      ],
      "title": "drm/amdgpu: Replace Mutex with Spinlock for RLCG register access to avoid Priority Inversion in SRIOV",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38104",
    "datePublished": "2025-04-18T07:01:31.091Z",
    "dateReserved": "2025-04-16T04:51:23.985Z",
    "dateUpdated": "2025-07-17T16:55:36.648Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-QV4F-MR6G-R994

CVE-2025-38104 (GCVE-0-2025-38104)

Tags

Sightings

Nomenclature