GHSA-FR3Q-V98Q-FWQ5

Vulnerability from github – Published: 2024-04-02 09:30 – Updated: 2025-01-07 18:30
VLAI
Details

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

drm/sched: fix null-ptr-deref in init entity

The bug can be triggered by sending an amdgpu_cs_wait_ioctl to the AMDGPU DRM driver on any ASICs with valid context. The bug was reported by Joonkyo Jung joonkyoj@yonsei.ac.kr. For example the following code:

static void Syzkaller2(int fd)
{
union drm_amdgpu_ctx arg1;
union drm_amdgpu_wait_cs arg2;

arg1.in.op = AMDGPU_CTX_OP_ALLOC_CTX;
ret = drmIoctl(fd, 0x140106442 /* amdgpu_ctx_ioctl */, &arg1);

arg2.in.handle = 0x0;
arg2.in.timeout = 0x2000000000000;
arg2.in.ip_type = AMD_IP_VPE /* 0x9 */;
arg2->in.ip_instance = 0x0;
arg2.in.ring = 0x0;
arg2.in.ctx_id = arg1.out.alloc.ctx_id;

drmIoctl(fd, 0xc0206449 /* AMDGPU_WAIT_CS * /, &arg2);
}

The ioctl AMDGPU_WAIT_CS without previously submitted job could be assumed that the error should be returned, but the following commit 1decbf6bb0b4dc56c9da6c5e57b994ebfc2be3aa modified the logic and allowed to have sched_rq equal to NULL.

As a result when there is no job the ioctl AMDGPU_WAIT_CS returns success. The change fixes null-ptr-deref in init entity and the stack below demonstrates the error condition:

[ +0.000007] BUG: kernel NULL pointer dereference, address: 0000000000000028 [ +0.007086] #PF: supervisor read access in kernel mode [ +0.005234] #PF: error_code(0x0000) - not-present page [ +0.005232] PGD 0 P4D 0 [ +0.002501] Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI [ +0.005034] CPU: 10 PID: 9229 Comm: amd_basic Tainted: G B W L 6.7.0+ #4 [ +0.007797] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020 [ +0.009798] RIP: 0010:drm_sched_entity_init+0x2d3/0x420 [gpu_sched] [ +0.006426] Code: 80 00 00 00 00 00 00 00 e8 1a 81 82 e0 49 89 9c 24 c0 00 00 00 4c 89 ef e8 4a 80 82 e0 49 8b 5d 00 48 8d 7b 28 e8 3d 80 82 e0 <48> 83 7b 28 00 0f 84 28 01 00 00 4d 8d ac 24 98 00 00 00 49 8d 5c [ +0.019094] RSP: 0018:ffffc90014c1fa40 EFLAGS: 00010282 [ +0.005237] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8113f3fa [ +0.007326] RDX: fffffbfff0a7889d RSI: 0000000000000008 RDI: ffffffff853c44e0 [ +0.007264] RBP: ffffc90014c1fa80 R08: 0000000000000001 R09: fffffbfff0a7889c [ +0.007266] R10: ffffffff853c44e7 R11: 0000000000000001 R12: ffff8881a719b010 [ +0.007263] R13: ffff88810d412748 R14: 0000000000000002 R15: 0000000000000000 [ +0.007264] FS: 00007ffff7045540(0000) GS:ffff8883cc900000(0000) knlGS:0000000000000000 [ +0.008236] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0.005851] CR2: 0000000000000028 CR3: 000000011912e000 CR4: 0000000000350ef0 [ +0.007175] Call Trace: [ +0.002561] [ +0.002141] ? show_regs+0x6a/0x80 [ +0.003473] ? __die+0x25/0x70 [ +0.003124] ? page_fault_oops+0x214/0x720 [ +0.004179] ? preempt_count_sub+0x18/0xc0 [ +0.004093] ? __pfx_page_fault_oops+0x10/0x10 [ +0.004590] ? srso_return_thunk+0x5/0x5f [ +0.004000] ? vprintk_default+0x1d/0x30 [ +0.004063] ? srso_return_thunk+0x5/0x5f [ +0.004087] ? vprintk+0x5c/0x90 [ +0.003296] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched] [ +0.005807] ? srso_return_thunk+0x5/0x5f [ +0.004090] ? printk+0xb3/0xe0 [ +0.003293] ? __pfx__printk+0x10/0x10 [ +0.003735] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ +0.005482] ? do_user_addr_fault+0x345/0x770 [ +0.004361] ? exc_page_fault+0x64/0xf0 [ +0.003972] ? asm_exc_page_fault+0x27/0x30 [ +0.004271] ? add_taint+0x2a/0xa0 [ +0.003476] ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched] [ +0.005812] amdgpu_ctx_get_entity+0x3f9/0x770 [amdgpu] [ +0.009530] ? finish_task_switch.isra.0+0x129/0x470 [ +0.005068] ? __pfx_amdgpu_ctx_get_entity+0x10/0x10 [amdgpu] [ +0.010063] ? __kasan_check_write+0x14/0x20 [ +0.004356] ? srso_return_thunk+0x5/0x5f [ +0.004001] ? mutex_unlock+0x81/0xd0 [ +0.003802] ? srso_return_thunk+0x5/0x5f [ +0.004096] amdgpu_cs_wait_ioctl+0xf6/0x270 [amdgpu] [ +0.009355] ? __pfx ---truncated---

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-26657"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-04-02T07:15:42Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sched: fix null-ptr-deref in init entity\n\nThe bug can be triggered by sending an amdgpu_cs_wait_ioctl\nto the AMDGPU DRM driver on any ASICs with valid context.\nThe bug was reported by Joonkyo Jung \u003cjoonkyoj@yonsei.ac.kr\u003e.\nFor example the following code:\n\n    static void Syzkaller2(int fd)\n    {\n\tunion drm_amdgpu_ctx arg1;\n\tunion drm_amdgpu_wait_cs arg2;\n\n\targ1.in.op = AMDGPU_CTX_OP_ALLOC_CTX;\n\tret = drmIoctl(fd, 0x140106442 /* amdgpu_ctx_ioctl */, \u0026arg1);\n\n\targ2.in.handle = 0x0;\n\targ2.in.timeout = 0x2000000000000;\n\targ2.in.ip_type = AMD_IP_VPE /* 0x9 */;\n\targ2-\u003ein.ip_instance = 0x0;\n\targ2.in.ring = 0x0;\n\targ2.in.ctx_id = arg1.out.alloc.ctx_id;\n\n\tdrmIoctl(fd, 0xc0206449 /* AMDGPU_WAIT_CS * /, \u0026arg2);\n    }\n\nThe ioctl AMDGPU_WAIT_CS without previously submitted job could be assumed that\nthe error should be returned, but the following commit 1decbf6bb0b4dc56c9da6c5e57b994ebfc2be3aa\nmodified the logic and allowed to have sched_rq equal to NULL.\n\nAs a result when there is no job the ioctl AMDGPU_WAIT_CS returns success.\nThe change fixes null-ptr-deref in init entity and the stack below demonstrates\nthe error condition:\n\n[  +0.000007] BUG: kernel NULL pointer dereference, address: 0000000000000028\n[  +0.007086] #PF: supervisor read access in kernel mode\n[  +0.005234] #PF: error_code(0x0000) - not-present page\n[  +0.005232] PGD 0 P4D 0\n[  +0.002501] Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI\n[  +0.005034] CPU: 10 PID: 9229 Comm: amd_basic Tainted: G    B   W    L     6.7.0+ #4\n[  +0.007797] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020\n[  +0.009798] RIP: 0010:drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[  +0.006426] Code: 80 00 00 00 00 00 00 00 e8 1a 81 82 e0 49 89 9c 24 c0 00 00 00 4c 89 ef e8 4a 80 82 e0 49 8b 5d 00 48 8d 7b 28 e8 3d 80 82 e0 \u003c48\u003e 83 7b 28 00 0f 84 28 01 00 00 4d 8d ac 24 98 00 00 00 49 8d 5c\n[  +0.019094] RSP: 0018:ffffc90014c1fa40 EFLAGS: 00010282\n[  +0.005237] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8113f3fa\n[  +0.007326] RDX: fffffbfff0a7889d RSI: 0000000000000008 RDI: ffffffff853c44e0\n[  +0.007264] RBP: ffffc90014c1fa80 R08: 0000000000000001 R09: fffffbfff0a7889c\n[  +0.007266] R10: ffffffff853c44e7 R11: 0000000000000001 R12: ffff8881a719b010\n[  +0.007263] R13: ffff88810d412748 R14: 0000000000000002 R15: 0000000000000000\n[  +0.007264] FS:  00007ffff7045540(0000) GS:ffff8883cc900000(0000) knlGS:0000000000000000\n[  +0.008236] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  +0.005851] CR2: 0000000000000028 CR3: 000000011912e000 CR4: 0000000000350ef0\n[  +0.007175] Call Trace:\n[  +0.002561]  \u003cTASK\u003e\n[  +0.002141]  ? show_regs+0x6a/0x80\n[  +0.003473]  ? __die+0x25/0x70\n[  +0.003124]  ? page_fault_oops+0x214/0x720\n[  +0.004179]  ? preempt_count_sub+0x18/0xc0\n[  +0.004093]  ? __pfx_page_fault_oops+0x10/0x10\n[  +0.004590]  ? srso_return_thunk+0x5/0x5f\n[  +0.004000]  ? vprintk_default+0x1d/0x30\n[  +0.004063]  ? srso_return_thunk+0x5/0x5f\n[  +0.004087]  ? vprintk+0x5c/0x90\n[  +0.003296]  ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[  +0.005807]  ? srso_return_thunk+0x5/0x5f\n[  +0.004090]  ? _printk+0xb3/0xe0\n[  +0.003293]  ? __pfx__printk+0x10/0x10\n[  +0.003735]  ? asm_sysvec_apic_timer_interrupt+0x1b/0x20\n[  +0.005482]  ? do_user_addr_fault+0x345/0x770\n[  +0.004361]  ? exc_page_fault+0x64/0xf0\n[  +0.003972]  ? asm_exc_page_fault+0x27/0x30\n[  +0.004271]  ? add_taint+0x2a/0xa0\n[  +0.003476]  ? drm_sched_entity_init+0x2d3/0x420 [gpu_sched]\n[  +0.005812]  amdgpu_ctx_get_entity+0x3f9/0x770 [amdgpu]\n[  +0.009530]  ? finish_task_switch.isra.0+0x129/0x470\n[  +0.005068]  ? __pfx_amdgpu_ctx_get_entity+0x10/0x10 [amdgpu]\n[  +0.010063]  ? __kasan_check_write+0x14/0x20\n[  +0.004356]  ? srso_return_thunk+0x5/0x5f\n[  +0.004001]  ? mutex_unlock+0x81/0xd0\n[  +0.003802]  ? srso_return_thunk+0x5/0x5f\n[  +0.004096]  amdgpu_cs_wait_ioctl+0xf6/0x270 [amdgpu]\n[  +0.009355]  ? __pfx_\n---truncated---",
  "id": "GHSA-fr3q-v98q-fwq5",
  "modified": "2025-01-07T18:30:39Z",
  "published": "2024-04-02T09:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26657"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54b5b7275dfdec35812ccce70930cd7c4ee612b2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74cd204c7afe498aa9dcc3ebf0ecac53d477a429"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f34e8bb7d6c6626933fe993e03ed59ae85e16abb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.