cve-2024-26698
Vulnerability from cvelistv5
Published
2024-04-03 14:54
Modified
2024-08-02 00:14
Severity
Summary
hv_netvsc: Fix race condition between netvsc_probe and netvsc_remove
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0e8875de9dad12805ff66e92cd5edea6a421f1cd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/22a77c0f5b8233237731df3288d067af51a2fd7b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/48a8ccccffbae10c91d31fc872db5c31aba07518
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7656372ae190e54e8c8cf1039725a5ea59fdf84a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ec807e7b6f5fcf9499f3baa69f254bb239a847f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e0526ec5360a48ad3ab2e26e802b0532302a7e11
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhv_netvsc: Fix race condition between netvsc_probe and netvsc_remove\n\nIn commit ac5047671758 (\"hv_netvsc: Disable NAPI before closing the\nVMBus channel\"), napi_disable was getting called for all channels,\nincluding all subchannels without confirming if they are enabled or not.\n\nThis caused hv_netvsc getting hung at napi_disable, when netvsc_probe()\nhas finished running but nvdev-\u003esubchan_work has not started yet.\nnetvsc_subchan_work() -\u003e rndis_set_subchannel() has not created the\nsub-channels and because of that netvsc_sc_open() is not running.\nnetvsc_remove() calls cancel_work_sync(\u0026nvdev-\u003esubchan_work), for which\nnetvsc_subchan_work did not run.\n\nnetif_napi_add() sets the bit NAPI_STATE_SCHED because it ensures NAPI\ncannot be scheduled. Then netvsc_sc_open() -\u003e napi_enable will clear the\nNAPIF_STATE_SCHED bit, so it can be scheduled. napi_disable() does the\nopposite.\n\nNow during netvsc_device_remove(), when napi_disable is called for those\nsubchannels, napi_disable gets stuck on infinite msleep.\n\nThis fix addresses this problem by ensuring that napi_disable() is not\ngetting called for non-enabled NAPI struct.\nBut netif_napi_del() is still necessary for these non-enabled NAPI struct\nfor cleanup purpose.\n\nCall trace:\n[  654.559417] task:modprobe        state:D stack:    0 pid: 2321 ppid:  1091 flags:0x00004002\n[  654.568030] Call Trace:\n[  654.571221]  \u003cTASK\u003e\n[  654.573790]  __schedule+0x2d6/0x960\n[  654.577733]  schedule+0x69/0xf0\n[  654.581214]  schedule_timeout+0x87/0x140\n[  654.585463]  ? __bpf_trace_tick_stop+0x20/0x20\n[  654.590291]  msleep+0x2d/0x40\n[  654.593625]  napi_disable+0x2b/0x80\n[  654.597437]  netvsc_device_remove+0x8a/0x1f0 [hv_netvsc]\n[  654.603935]  rndis_filter_device_remove+0x194/0x1c0 [hv_netvsc]\n[  654.611101]  ? do_wait_intr+0xb0/0xb0\n[  654.615753]  netvsc_remove+0x7c/0x120 [hv_netvsc]\n[  654.621675]  vmbus_remove+0x27/0x40 [hv_vmbus]"
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          "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
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      "title": "hv_netvsc: Fix race condition between netvsc_probe and netvsc_remove",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26698",
    "datePublished": "2024-04-03T14:54:58.577Z",
    "dateReserved": "2024-02-19T14:20:24.157Z",
    "dateUpdated": "2024-08-02T00:14:12.951Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26698\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-03T15:15:52.933\",\"lastModified\":\"2024-06-25T22:15:21.233\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nhv_netvsc: Fix race condition between netvsc_probe and netvsc_remove\\n\\nIn commit ac5047671758 (\\\"hv_netvsc: Disable NAPI before closing the\\nVMBus channel\\\"), napi_disable was getting called for all channels,\\nincluding all subchannels without confirming if they are enabled or not.\\n\\nThis caused hv_netvsc getting hung at napi_disable, when netvsc_probe()\\nhas finished running but nvdev-\u003esubchan_work has not started yet.\\nnetvsc_subchan_work() -\u003e rndis_set_subchannel() has not created the\\nsub-channels and because of that netvsc_sc_open() is not running.\\nnetvsc_remove() calls cancel_work_sync(\u0026nvdev-\u003esubchan_work), for which\\nnetvsc_subchan_work did not run.\\n\\nnetif_napi_add() sets the bit NAPI_STATE_SCHED because it ensures NAPI\\ncannot be scheduled. Then netvsc_sc_open() -\u003e napi_enable will clear the\\nNAPIF_STATE_SCHED bit, so it can be scheduled. napi_disable() does the\\nopposite.\\n\\nNow during netvsc_device_remove(), when napi_disable is called for those\\nsubchannels, napi_disable gets stuck on infinite msleep.\\n\\nThis fix addresses this problem by ensuring that napi_disable() is not\\ngetting called for non-enabled NAPI struct.\\nBut netif_napi_del() is still necessary for these non-enabled NAPI struct\\nfor cleanup purpose.\\n\\nCall trace:\\n[  654.559417] task:modprobe        state:D stack:    0 pid: 2321 ppid:  1091 flags:0x00004002\\n[  654.568030] Call Trace:\\n[  654.571221]  \u003cTASK\u003e\\n[  654.573790]  __schedule+0x2d6/0x960\\n[  654.577733]  schedule+0x69/0xf0\\n[  654.581214]  schedule_timeout+0x87/0x140\\n[  654.585463]  ? __bpf_trace_tick_stop+0x20/0x20\\n[  654.590291]  msleep+0x2d/0x40\\n[  654.593625]  napi_disable+0x2b/0x80\\n[  654.597437]  netvsc_device_remove+0x8a/0x1f0 [hv_netvsc]\\n[  654.603935]  rndis_filter_device_remove+0x194/0x1c0 [hv_netvsc]\\n[  654.611101]  ? do_wait_intr+0xb0/0xb0\\n[  654.615753]  netvsc_remove+0x7c/0x120 [hv_netvsc]\\n[  654.621675]  vmbus_remove+0x27/0x40 [hv_vmbus]\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: hv_netvsc: corrige la condici\u00f3n de ejecuci\u00f3n entre netvsc_probe y netvsc_remove En el commit ac5047671758 (\\\"hv_netvsc: deshabilite NAPI antes de cerrar el canal VMBus\\\"), se llamaba a napi_disable para todos los canales, incluidos todos los subcanales sin confirmando si est\u00e1n habilitados o no. Esto provoc\u00f3 que hv_netvsc se colgara en napi_disable, cuando netvsc_probe() termin\u00f3 de ejecutarse pero nvdev-\u0026gt;subchan_work a\u00fan no se inici\u00f3. netvsc_subchan_work() -\u0026gt; rndis_set_subchannel() no ha creado los subcanales y por eso netvsc_sc_open() no se est\u00e1 ejecutando. netvsc_remove() llama a cancel_work_sync(\u0026amp;nvdev-\u0026gt;subchan_work), para lo cual netvsc_subchan_work no se ejecut\u00f3. netif_napi_add() establece el bit NAPI_STATE_SCHED porque garantiza que NAPI no se pueda programar. Luego netvsc_sc_open() -\u0026gt; napi_enable borrar\u00e1 el bit NAPIF_STATE_SCHED, para que pueda programarse. napi_disable() hace lo contrario. Ahora, durante netvsc_device_remove(), cuando se llama a napi_disable para esos subcanales, napi_disable se atasca en msleep infinito. Esta soluci\u00f3n soluciona este problema garantizando que no se llame a napi_disable() para una estructura NAPI no habilitada. Pero netif_napi_del() sigue siendo necesario para estas estructuras NAPI no habilitadas con fines de limpieza. Rastreo de llamadas: [654.559417] tarea:modprobe estado:D pila: 0 pid: 2321 ppid: 1091 banderas:0x00004002 [654.568030] Rastreo de llamadas: [654.571221]  [654.573790] __schedule+0x2d6/0x960 [ 65 4.577733] horario+0x69 /0xf0 [654.581214] Schedule_timeout+0x87/0x140 [654.585463]? __bpf_trace_tick_stop+0x20/0x20 [ 654.590291] msleep+0x2d/0x40 [ 654.593625] napi_disable+0x2b/0x80 [ 654.597437] netvsc_device_remove+0x8a/0x1f0 [hv_netvsc] [ 6 54.603935] rndis_filter_device_remove+0x194/0x1c0 [hv_netvsc] [654.611101]? do_wait_intr+0xb0/0xb0 [ 654.615753] netvsc_remove+0x7c/0x120 [hv_netvsc] [ 654.621675] vmbus_remove+0x27/0x40 [hv_vmbus]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0e8875de9dad12805ff66e92cd5edea6a421f1cd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/22a77c0f5b8233237731df3288d067af51a2fd7b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/48a8ccccffbae10c91d31fc872db5c31aba07518\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7656372ae190e54e8c8cf1039725a5ea59fdf84a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9ec807e7b6f5fcf9499f3baa69f254bb239a847f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e0526ec5360a48ad3ab2e26e802b0532302a7e11\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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