cve-2021-47582
Vulnerability from cvelistv5
Published
2024-06-19 14:53
Modified
2024-09-11 17:34
Severity
Summary
USB: core: Make do_proc_control() and do_proc_bulk() killable
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/403716741c6c2c510dce44e88f085a740f535de6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae8709b296d80c7f45aa1f35c0e7659ad69edce1
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
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                "id": "CVE-2021-47582",
                "options": [
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                    "Exploitation": "none"
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                "timestamp": "2024-09-10T17:12:46.485815Z",
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          "product": "Linux",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: core: Make do_proc_control() and do_proc_bulk() killable\n\nThe USBDEVFS_CONTROL and USBDEVFS_BULK ioctls invoke\nusb_start_wait_urb(), which contains an uninterruptible wait with a\nuser-specified timeout value.  If timeout value is very large and the\ndevice being accessed does not respond in a reasonable amount of time,\nthe kernel will complain about \"Task X blocked for more than N\nseconds\", as found in testing by syzbot:\n\nINFO: task syz-executor.0:8700 blocked for more than 143 seconds.\n      Not tainted 5.14.0-rc7-syzkaller #0\n\"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:syz-executor.0  state:D stack:23192 pid: 8700 ppid:  8455 flags:0x00004004\nCall Trace:\n context_switch kernel/sched/core.c:4681 [inline]\n __schedule+0xc07/0x11f0 kernel/sched/core.c:5938\n schedule+0x14b/0x210 kernel/sched/core.c:6017\n schedule_timeout+0x98/0x2f0 kernel/time/timer.c:1857\n do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85\n __wait_for_common kernel/sched/completion.c:106 [inline]\n wait_for_common kernel/sched/completion.c:117 [inline]\n wait_for_completion_timeout+0x46/0x60 kernel/sched/completion.c:157\n usb_start_wait_urb+0x167/0x550 drivers/usb/core/message.c:63\n do_proc_bulk+0x978/0x1080 drivers/usb/core/devio.c:1236\n proc_bulk drivers/usb/core/devio.c:1273 [inline]\n usbdev_do_ioctl drivers/usb/core/devio.c:2547 [inline]\n usbdev_ioctl+0x3441/0x6b10 drivers/usb/core/devio.c:2713\n...\n\nTo fix this problem, this patch replaces usbfs\u0027s calls to\nusb_control_msg() and usb_bulk_msg() with special-purpose code that\ndoes essentially the same thing (as recommended in the comment for\nusb_start_wait_urb()), except that it always uses a killable wait and\nit uses GFP_KERNEL rather than GFP_NOIO."
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      "title": "USB: core: Make do_proc_control() and do_proc_bulk() killable",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47582",
    "datePublished": "2024-06-19T14:53:48.788Z",
    "dateReserved": "2024-05-24T15:11:00.730Z",
    "dateUpdated": "2024-09-11T17:34:52.813Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47582\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-19T15:15:52.743\",\"lastModified\":\"2024-06-20T12:43:25.663\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nUSB: core: Make do_proc_control() and do_proc_bulk() killable\\n\\nThe USBDEVFS_CONTROL and USBDEVFS_BULK ioctls invoke\\nusb_start_wait_urb(), which contains an uninterruptible wait with a\\nuser-specified timeout value.  If timeout value is very large and the\\ndevice being accessed does not respond in a reasonable amount of time,\\nthe kernel will complain about \\\"Task X blocked for more than N\\nseconds\\\", as found in testing by syzbot:\\n\\nINFO: task syz-executor.0:8700 blocked for more than 143 seconds.\\n      Not tainted 5.14.0-rc7-syzkaller #0\\n\\\"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\\\" disables this message.\\ntask:syz-executor.0  state:D stack:23192 pid: 8700 ppid:  8455 flags:0x00004004\\nCall Trace:\\n context_switch kernel/sched/core.c:4681 [inline]\\n __schedule+0xc07/0x11f0 kernel/sched/core.c:5938\\n schedule+0x14b/0x210 kernel/sched/core.c:6017\\n schedule_timeout+0x98/0x2f0 kernel/time/timer.c:1857\\n do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85\\n __wait_for_common kernel/sched/completion.c:106 [inline]\\n wait_for_common kernel/sched/completion.c:117 [inline]\\n wait_for_completion_timeout+0x46/0x60 kernel/sched/completion.c:157\\n usb_start_wait_urb+0x167/0x550 drivers/usb/core/message.c:63\\n do_proc_bulk+0x978/0x1080 drivers/usb/core/devio.c:1236\\n proc_bulk drivers/usb/core/devio.c:1273 [inline]\\n usbdev_do_ioctl drivers/usb/core/devio.c:2547 [inline]\\n usbdev_ioctl+0x3441/0x6b10 drivers/usb/core/devio.c:2713\\n...\\n\\nTo fix this problem, this patch replaces usbfs\u0027s calls to\\nusb_control_msg() and usb_bulk_msg() with special-purpose code that\\ndoes essentially the same thing (as recommended in the comment for\\nusb_start_wait_urb()), except that it always uses a killable wait and\\nit uses GFP_KERNEL rather than GFP_NOIO.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: USB: core: Hacer que do_proc_control() y do_proc_bulk() se puedan eliminar. Los ioctls USBDEVFS_CONTROL y USBDEVFS_BULK invocan usb_start_wait_urb(), que contiene una espera ininterrumpida con un valor de tiempo de espera especificado por el usuario. Si el valor del tiempo de espera es muy grande y el dispositivo al que se accede no responde en un per\u00edodo de tiempo razonable, el kernel se quejar\u00e1 de \\\"Tarea X bloqueada durante m\u00e1s de N segundos\\\", como se encontr\u00f3 en las pruebas realizadas por syzbot: INFORMACI\u00d3N: tarea syz-executor .0:8700 bloqueado durante m\u00e1s de 143 segundos. Not tainted 5.14.0-rc7-syzkaller #0 \\\"echo 0 \u0026gt; /proc/sys/kernel/hung_task_timeout_secs\\\" desactiva este mensaje. tarea:syz-executor.0 estado:D pila:23192 pid: 8700 ppid: 8455 banderas:0x00004004 Seguimiento de llamadas: context_switch kernel/sched/core.c:4681 [en l\u00ednea] __schedule+0xc07/0x11f0 kernel/sched/core.c :5938 programaci\u00f3n+0x14b/0x210 kernel/sched/core.c:6017 Schedule_timeout+0x98/0x2f0 kernel/time/timer.c:1857 do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion .c:106 [en l\u00ednea] wait_for_common kernel/sched/completion.c:117 [en l\u00ednea] wait_for_completion_timeout+0x46/0x60 kernel/sched/completion.c:157 usb_start_wait_urb+0x167/0x550 drivers/usb/core/message.c:63 do_proc_bulk+0x978/0x1080 controladores/usb/core/devio.c:1236 controladores proc_bulk/usb/core/devio.c:1273 [en l\u00ednea] usbdev_do_ioctl controladores/usb/core/devio.c:2547 [en l\u00ednea] usbdev_ioctl+0x3441/ 0x6b10 drivers/usb/core/devio.c:2713 ... Para solucionar este problema, este parche reemplaza las llamadas de usbfs a usb_control_msg() y usb_bulk_msg() con c\u00f3digo de prop\u00f3sito especial que hace esencialmente lo mismo (como se recomienda en el comentario para usb_start_wait_urb()), excepto que siempre usa una espera eliminable y usa GFP_KERNEL en lugar de GFP_NOIO.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/403716741c6c2c510dce44e88f085a740f535de6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ae8709b296d80c7f45aa1f35c0e7659ad69edce1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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