cve-2021-47582
Vulnerability from cvelistv5
Published
2024-06-19 14:53
Modified
2024-12-19 07:45
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: USB: core: Make do_proc_control() and do_proc_bulk() killable The USBDEVFS_CONTROL and USBDEVFS_BULK ioctls invoke usb_start_wait_urb(), which contains an uninterruptible wait with a user-specified timeout value. If timeout value is very large and the device being accessed does not respond in a reasonable amount of time, the kernel will complain about "Task X blocked for more than N seconds", as found in testing by syzbot: INFO: task syz-executor.0:8700 blocked for more than 143 seconds. Not tainted 5.14.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:23192 pid: 8700 ppid: 8455 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0xc07/0x11f0 kernel/sched/core.c:5938 schedule+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 [inline] wait_for_common kernel/sched/completion.c:117 [inline] 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 drivers/usb/core/devio.c:1236 proc_bulk drivers/usb/core/devio.c:1273 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2547 [inline] usbdev_ioctl+0x3441/0x6b10 drivers/usb/core/devio.c:2713 ... To fix this problem, this patch replaces usbfs's calls to usb_control_msg() and usb_bulk_msg() with special-purpose code that does essentially the same thing (as recommended in the comment for usb_start_wait_urb()), except that it always uses a killable wait and it uses GFP_KERNEL rather than GFP_NOIO.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/403716741c6c2c510dce44e88f085a740f535de6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae8709b296d80c7f45aa1f35c0e7659ad69edce1
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/403716741c6c2c510dce44e88f085a740f535de6
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ae8709b296d80c7f45aa1f35c0e7659ad69edce1
Impacted products
Vendor Product Version
Linux Linux
Show details on NVD website

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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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    "dateReserved": "2024-05-24T15:11:00.730Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47582\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-19T15:15:52.743\",\"lastModified\":\"2024-11-21T06:36:35.887\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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\"},{\"url\":\"https://git.kernel.org/stable/c/403716741c6c2c510dce44e88f085a740f535de6\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/ae8709b296d80c7f45aa1f35c0e7659ad69edce1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


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