CVE-2024-26607
Vulnerability from cvelistv5
Published
2024-02-29 11:47
Modified
2024-11-05 09:12
Severity ?
Summary
drm/bridge: sii902x: Fix probing race issue
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/08ac6f132dd77e40f786d8af51140c96c6d739c9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2a4c6af7934a7b4c304542c38fee35e09cc1770c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/56f96cf6eb11a1c2d594367c3becbfb06a855ec1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e0f83c234ea7a3dec1f84e5d02caa1c51664a076
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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                "id": "CVE-2024-26607",
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    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/bridge/sii902x.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/bridge: sii902x: Fix probing race issue\n\nA null pointer dereference crash has been observed rarely on TI\nplatforms using sii9022 bridge:\n\n[   53.271356]  sii902x_get_edid+0x34/0x70 [sii902x]\n[   53.276066]  sii902x_bridge_get_edid+0x14/0x20 [sii902x]\n[   53.281381]  drm_bridge_get_edid+0x20/0x34 [drm]\n[   53.286305]  drm_bridge_connector_get_modes+0x8c/0xcc [drm_kms_helper]\n[   53.292955]  drm_helper_probe_single_connector_modes+0x190/0x538 [drm_kms_helper]\n[   53.300510]  drm_client_modeset_probe+0x1f0/0xbd4 [drm]\n[   53.305958]  __drm_fb_helper_initial_config_and_unlock+0x50/0x510 [drm_kms_helper]\n[   53.313611]  drm_fb_helper_initial_config+0x48/0x58 [drm_kms_helper]\n[   53.320039]  drm_fbdev_dma_client_hotplug+0x84/0xd4 [drm_dma_helper]\n[   53.326401]  drm_client_register+0x5c/0xa0 [drm]\n[   53.331216]  drm_fbdev_dma_setup+0xc8/0x13c [drm_dma_helper]\n[   53.336881]  tidss_probe+0x128/0x264 [tidss]\n[   53.341174]  platform_probe+0x68/0xc4\n[   53.344841]  really_probe+0x188/0x3c4\n[   53.348501]  __driver_probe_device+0x7c/0x16c\n[   53.352854]  driver_probe_device+0x3c/0x10c\n[   53.357033]  __device_attach_driver+0xbc/0x158\n[   53.361472]  bus_for_each_drv+0x88/0xe8\n[   53.365303]  __device_attach+0xa0/0x1b4\n[   53.369135]  device_initial_probe+0x14/0x20\n[   53.373314]  bus_probe_device+0xb0/0xb4\n[   53.377145]  deferred_probe_work_func+0xcc/0x124\n[   53.381757]  process_one_work+0x1f0/0x518\n[   53.385770]  worker_thread+0x1e8/0x3dc\n[   53.389519]  kthread+0x11c/0x120\n[   53.392750]  ret_from_fork+0x10/0x20\n\nThe issue here is as follows:\n\n- tidss probes, but is deferred as sii902x is still missing.\n- sii902x starts probing and enters sii902x_init().\n- sii902x calls drm_bridge_add(). Now the sii902x bridge is ready from\n  DRM\u0027s perspective.\n- sii902x calls sii902x_audio_codec_init() and\n  platform_device_register_data()\n- The registration of the audio platform device causes probing of the\n  deferred devices.\n- tidss probes, which eventually causes sii902x_bridge_get_edid() to be\n  called.\n- sii902x_bridge_get_edid() tries to use the i2c to read the edid.\n  However, the sii902x driver has not set up the i2c part yet, leading\n  to the crash.\n\nFix this by moving the drm_bridge_add() to the end of the\nsii902x_init(), which is also at the very end of sii902x_probe()."
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      "providerMetadata": {
        "dateUpdated": "2024-11-05T09:12:30.820Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/08ac6f132dd77e40f786d8af51140c96c6d739c9"
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      "title": "drm/bridge: sii902x: Fix probing race issue",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26607",
    "datePublished": "2024-02-29T11:47:26.439Z",
    "dateReserved": "2024-02-19T14:20:24.130Z",
    "dateUpdated": "2024-11-05T09:12:30.820Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26607\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-29T12:15:47.920\",\"lastModified\":\"2024-02-29T13:49:29.390\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/bridge: sii902x: Fix probing race issue\\n\\nA null pointer dereference crash has been observed rarely on TI\\nplatforms using sii9022 bridge:\\n\\n[   53.271356]  sii902x_get_edid+0x34/0x70 [sii902x]\\n[   53.276066]  sii902x_bridge_get_edid+0x14/0x20 [sii902x]\\n[   53.281381]  drm_bridge_get_edid+0x20/0x34 [drm]\\n[   53.286305]  drm_bridge_connector_get_modes+0x8c/0xcc [drm_kms_helper]\\n[   53.292955]  drm_helper_probe_single_connector_modes+0x190/0x538 [drm_kms_helper]\\n[   53.300510]  drm_client_modeset_probe+0x1f0/0xbd4 [drm]\\n[   53.305958]  __drm_fb_helper_initial_config_and_unlock+0x50/0x510 [drm_kms_helper]\\n[   53.313611]  drm_fb_helper_initial_config+0x48/0x58 [drm_kms_helper]\\n[   53.320039]  drm_fbdev_dma_client_hotplug+0x84/0xd4 [drm_dma_helper]\\n[   53.326401]  drm_client_register+0x5c/0xa0 [drm]\\n[   53.331216]  drm_fbdev_dma_setup+0xc8/0x13c [drm_dma_helper]\\n[   53.336881]  tidss_probe+0x128/0x264 [tidss]\\n[   53.341174]  platform_probe+0x68/0xc4\\n[   53.344841]  really_probe+0x188/0x3c4\\n[   53.348501]  __driver_probe_device+0x7c/0x16c\\n[   53.352854]  driver_probe_device+0x3c/0x10c\\n[   53.357033]  __device_attach_driver+0xbc/0x158\\n[   53.361472]  bus_for_each_drv+0x88/0xe8\\n[   53.365303]  __device_attach+0xa0/0x1b4\\n[   53.369135]  device_initial_probe+0x14/0x20\\n[   53.373314]  bus_probe_device+0xb0/0xb4\\n[   53.377145]  deferred_probe_work_func+0xcc/0x124\\n[   53.381757]  process_one_work+0x1f0/0x518\\n[   53.385770]  worker_thread+0x1e8/0x3dc\\n[   53.389519]  kthread+0x11c/0x120\\n[   53.392750]  ret_from_fork+0x10/0x20\\n\\nThe issue here is as follows:\\n\\n- tidss probes, but is deferred as sii902x is still missing.\\n- sii902x starts probing and enters sii902x_init().\\n- sii902x calls drm_bridge_add(). Now the sii902x bridge is ready from\\n  DRM\u0027s perspective.\\n- sii902x calls sii902x_audio_codec_init() and\\n  platform_device_register_data()\\n- The registration of the audio platform device causes probing of the\\n  deferred devices.\\n- tidss probes, which eventually causes sii902x_bridge_get_edid() to be\\n  called.\\n- sii902x_bridge_get_edid() tries to use the i2c to read the edid.\\n  However, the sii902x driver has not set up the i2c part yet, leading\\n  to the crash.\\n\\nFix this by moving the drm_bridge_add() to the end of the\\nsii902x_init(), which is also at the very end of sii902x_probe().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/bridge: sii902x: soluciona el problema de carrera de sondeo. Rara vez se ha observado un fallo de desreferencia de puntero nulo en plataformas TI que utilizan el puente sii9022: [ 53.271356] sii902x_get_edid+0x34/0x70 [sii902x] [ 53.276066] sii902x_bridge_get_edid+0x14/0x20 [sii902x] [ 53.281381] drm_bridge_get_edid+0x20/0x34 [drm] [ 53.286305] drm_bridge_connector_get_modes+0x8c/0xcc [drm_kms_helper] [ 53 .292955] drm_helper_probe_single_connector_modes+0x190/0x538 [drm_kms_helper] [ 53.300510] drm_client_modeset_probe+0x1f0/ 0xbd4 [drm] [ 53.305958] __drm_fb_helper_initial_config_and_unlock+0x50/0x510 [drm_kms_helper] [ 53.313611] drm_fb_helper_initial_config+0x48/0x58 [drm_kms_helper] [ 53.320039] drm_f bdev_dma_client_hotplug+0x84/0xd4 [drm_dma_helper] [ 53.326401] drm_client_register+0x5c/0xa0 [drm] [ 53.331216 ] drm_fbdev_dma_setup+0xc8/0x13c [drm_dma_helper] [ 53.336881] tidss_probe+0x128/0x264 [tidss] [ 53.341174] platform_probe+0x68/0xc4 [ 53.344841] very_probe+0x188/0x3 c4 [ 53.348501] __driver_probe_device+0x7c/0x16c [ 53.352854] driver_probe_device+0x3c /0x10c [ 53.357033] __device_attach_driver+0xbc/0x158 [ 53.361472] bus_for_each_drv+0x88/0xe8 [ 53.365303] __device_attach+0xa0/0x1b4 [ 53.369135] dispositivo_initial_probe+0x14/0 x20 [ 53.373314] dispositivo_probe_bus+0xb0/0xb4 [ 53.377145] funci\u00f3n_trabajo_probe_diferida+0xcc/0x124 [ 53.381757] Process_one_work+0x1f0/0x518 [ 53.385770] Worker_thread+0x1e8/0x3dc [ 53.389519] kthread+0x11c/0x120 [ 53.392750] ret_from_fork+0x10/0x20 El problema aqu\u00ed es el siguiente: - tids s, pero se pospone ya que sii902x todav\u00eda est\u00e1 desaparecido. - sii902x comienza a sondear e ingresa sii902x_init(). - sii902x llama a drm_bridge_add(). Ahora el puente sii902x est\u00e1 listo desde la perspectiva de DRM. - sii902x llama a sii902x_audio_codec_init() y platform_device_register_data() - El registro del dispositivo de plataforma de audio provoca el sondeo de los dispositivos diferidos. - sondas tidss, que eventualmente provocan que se llame a sii902x_bridge_get_edid(). - sii902x_bridge_get_edid() intenta usar i2c para leer el edit. Sin embargo, el controlador sii902x a\u00fan no ha configurado la parte i2c, lo que provoc\u00f3 el fallo. Solucione este problema moviendo drm_bridge_add() al final de sii902x_init(), que tambi\u00e9n est\u00e1 al final de sii902x_probe().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/08ac6f132dd77e40f786d8af51140c96c6d739c9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2a4c6af7934a7b4c304542c38fee35e09cc1770c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/56f96cf6eb11a1c2d594367c3becbfb06a855ec1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e0f83c234ea7a3dec1f84e5d02caa1c51664a076\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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