cve-2024-35968
Vulnerability from cvelistv5
Published
2024-05-20 09:41
Modified
2024-11-05 09:25
Severity ?
Summary
pds_core: Fix pdsc_check_pci_health function to use work thread
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/38407914d48273d7f8ab765b9243658afe1c3ab6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/81665adf25d28a00a986533f1d3a5df76b79cad9
Impacted products
Vendor Product Version
Linux Linux Version: 6.8
Show details on NVD website

To clipboard 

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                "id": "CVE-2024-35968",
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                "timestamp": "2024-05-21T15:11:50.638119Z",
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    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/amd/pds_core/core.c",
            "drivers/net/ethernet/amd/pds_core/core.h",
            "drivers/net/ethernet/amd/pds_core/dev.c",
            "drivers/net/ethernet/amd/pds_core/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "programFiles": [
            "drivers/net/ethernet/amd/pds_core/core.c",
            "drivers/net/ethernet/amd/pds_core/core.h",
            "drivers/net/ethernet/amd/pds_core/dev.c",
            "drivers/net/ethernet/amd/pds_core/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npds_core: Fix pdsc_check_pci_health function to use work thread\n\nWhen the driver notices fw_status == 0xff it tries to perform a PCI\nreset on itself via pci_reset_function() in the context of the driver\u0027s\nhealth thread. However, pdsc_reset_prepare calls\npdsc_stop_health_thread(), which attempts to stop/flush the health\nthread. This results in a deadlock because the stop/flush will never\ncomplete since the driver called pci_reset_function() from the health\nthread context. Fix by changing the pdsc_check_pci_health_function()\nto queue a newly introduced pdsc_pci_reset_thread() on the pdsc\u0027s\nwork queue.\n\nUnloading the driver in the fw_down/dead state uncovered another issue,\nwhich can be seen in the following trace:\n\nWARNING: CPU: 51 PID: 6914 at kernel/workqueue.c:1450 __queue_work+0x358/0x440\n[...]\nRIP: 0010:__queue_work+0x358/0x440\n[...]\nCall Trace:\n \u003cTASK\u003e\n ? __warn+0x85/0x140\n ? __queue_work+0x358/0x440\n ? report_bug+0xfc/0x1e0\n ? handle_bug+0x3f/0x70\n ? exc_invalid_op+0x17/0x70\n ? asm_exc_invalid_op+0x1a/0x20\n ? __queue_work+0x358/0x440\n queue_work_on+0x28/0x30\n pdsc_devcmd_locked+0x96/0xe0 [pds_core]\n pdsc_devcmd_reset+0x71/0xb0 [pds_core]\n pdsc_teardown+0x51/0xe0 [pds_core]\n pdsc_remove+0x106/0x200 [pds_core]\n pci_device_remove+0x37/0xc0\n device_release_driver_internal+0xae/0x140\n driver_detach+0x48/0x90\n bus_remove_driver+0x6d/0xf0\n pci_unregister_driver+0x2e/0xa0\n pdsc_cleanup_module+0x10/0x780 [pds_core]\n __x64_sys_delete_module+0x142/0x2b0\n ? syscall_trace_enter.isra.18+0x126/0x1a0\n do_syscall_64+0x3b/0x90\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\nRIP: 0033:0x7fbd9d03a14b\n[...]\n\nFix this by preventing the devcmd reset if the FW is not running."
        }
      ],
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        "dateUpdated": "2024-11-05T09:25:56.149Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/81665adf25d28a00a986533f1d3a5df76b79cad9"
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      "title": "pds_core: Fix pdsc_check_pci_health function to use work thread",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-35968",
    "datePublished": "2024-05-20T09:41:57.162Z",
    "dateReserved": "2024-05-17T13:50:33.140Z",
    "dateUpdated": "2024-11-05T09:25:56.149Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-35968\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-20T10:15:11.713\",\"lastModified\":\"2024-05-20T13:00:04.957\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npds_core: Fix pdsc_check_pci_health function to use work thread\\n\\nWhen the driver notices fw_status == 0xff it tries to perform a PCI\\nreset on itself via pci_reset_function() in the context of the driver\u0027s\\nhealth thread. However, pdsc_reset_prepare calls\\npdsc_stop_health_thread(), which attempts to stop/flush the health\\nthread. This results in a deadlock because the stop/flush will never\\ncomplete since the driver called pci_reset_function() from the health\\nthread context. Fix by changing the pdsc_check_pci_health_function()\\nto queue a newly introduced pdsc_pci_reset_thread() on the pdsc\u0027s\\nwork queue.\\n\\nUnloading the driver in the fw_down/dead state uncovered another issue,\\nwhich can be seen in the following trace:\\n\\nWARNING: CPU: 51 PID: 6914 at kernel/workqueue.c:1450 __queue_work+0x358/0x440\\n[...]\\nRIP: 0010:__queue_work+0x358/0x440\\n[...]\\nCall Trace:\\n \u003cTASK\u003e\\n ? __warn+0x85/0x140\\n ? __queue_work+0x358/0x440\\n ? report_bug+0xfc/0x1e0\\n ? handle_bug+0x3f/0x70\\n ? exc_invalid_op+0x17/0x70\\n ? asm_exc_invalid_op+0x1a/0x20\\n ? __queue_work+0x358/0x440\\n queue_work_on+0x28/0x30\\n pdsc_devcmd_locked+0x96/0xe0 [pds_core]\\n pdsc_devcmd_reset+0x71/0xb0 [pds_core]\\n pdsc_teardown+0x51/0xe0 [pds_core]\\n pdsc_remove+0x106/0x200 [pds_core]\\n pci_device_remove+0x37/0xc0\\n device_release_driver_internal+0xae/0x140\\n driver_detach+0x48/0x90\\n bus_remove_driver+0x6d/0xf0\\n pci_unregister_driver+0x2e/0xa0\\n pdsc_cleanup_module+0x10/0x780 [pds_core]\\n __x64_sys_delete_module+0x142/0x2b0\\n ? syscall_trace_enter.isra.18+0x126/0x1a0\\n do_syscall_64+0x3b/0x90\\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\\nRIP: 0033:0x7fbd9d03a14b\\n[...]\\n\\nFix this by preventing the devcmd reset if the FW is not running.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: pds_core: corrige la funci\u00f3n pdsc_check_pci_health para usar el subproceso de trabajo. Cuando el controlador nota fw_status == 0xff, intenta realizar un restablecimiento de PCI sobre s\u00ed mismo a trav\u00e9s de pci_reset_function() en el contexto del subproceso de estado del controlador. . Sin embargo, pdsc_reset_prepare llama a pdsc_stop_health_thread(), que intenta detener/vaciar el hilo de salud. Esto da como resultado un punto muerto porque la parada/vaciado nunca se completar\u00e1 ya que el controlador llam\u00f3 a pci_reset_function() desde el contexto del hilo de salud. Para solucionarlo, cambie pdsc_check_pci_health_function() para poner en cola un pdsc_pci_reset_thread() reci\u00e9n introducido en la cola de trabajo del pdsc. La descarga del controlador en el estado fw_down/dead descubri\u00f3 otro problema, que se puede ver en el siguiente seguimiento: ADVERTENCIA: CPU: 51 PID: 6914 en kernel/workqueue.c:1450 __queue_work+0x358/0x440 [...] RIP: 0010:__queue_work+0x358/0x440 [...] Seguimiento de llamadas: ? __warn+0x85/0x140 ? __queue_work+0x358/0x440? report_bug+0xfc/0x1e0? handle_bug+0x3f/0x70? exc_invalid_op+0x17/0x70? asm_exc_invalid_op+0x1a/0x20? __queue_work+0x358/0x440 queue_work_on+0x28/0x30 pdsc_devcmd_locked+0x96/0xe0 [pds_core] pdsc_devcmd_reset+0x71/0xb0 [pds_core] pdsc_teardown+0x51/0xe0 [pds_core] pdsc_remove+0x106/0x200 [pds_core] pci_device_remove+0x37/0xc0 device_release_driver_internal+0xae /0x140 driver_detach+0x48/0x90 bus_remove_driver+0x6d/0xf0 pci_unregister_driver+0x2e/0xa0 pdsc_cleanup_module+0x10/0x780 [pds_core] __x64_sys_delete_module+0x142/0x2b0 ? syscall_trace_enter.isra.18+0x126/0x1a0 do_syscall_64+0x3b/0x90 Entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fbd9d03a14b [...] Solucione este problema evitando que devcmd se reinicie si el FW no se est\u00e1 ejecutando.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/38407914d48273d7f8ab765b9243658afe1c3ab6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/81665adf25d28a00a986533f1d3a5df76b79cad9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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