CVE-2021-47163
Vulnerability from cvelistv5
Published
2024-03-25 09:16
Modified
2024-11-04 12:00
Severity ?
EPSS score ?
Summary
tipc: wait and exit until all work queues are done
References
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"timestamp": "2024-04-01T19:41:39.688056Z",
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"product": "Linux",
"programFiles": [
"net/tipc/core.c",
"net/tipc/core.h",
"net/tipc/udp_media.c"
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: wait and exit until all work queues are done\n\nOn some host, a crash could be triggered simply by repeating these\ncommands several times:\n\n # modprobe tipc\n # tipc bearer enable media udp name UDP1 localip 127.0.0.1\n # rmmod tipc\n\n [] BUG: unable to handle kernel paging request at ffffffffc096bb00\n [] Workqueue: events 0xffffffffc096bb00\n [] Call Trace:\n [] ? process_one_work+0x1a7/0x360\n [] ? worker_thread+0x30/0x390\n [] ? create_worker+0x1a0/0x1a0\n [] ? kthread+0x116/0x130\n [] ? kthread_flush_work_fn+0x10/0x10\n [] ? ret_from_fork+0x35/0x40\n\nWhen removing the TIPC module, the UDP tunnel sock will be delayed to\nrelease in a work queue as sock_release() can\u0027t be done in rtnl_lock().\nIf the work queue is schedule to run after the TIPC module is removed,\nkernel will crash as the work queue function cleanup_beareri() code no\nlonger exists when trying to invoke it.\n\nTo fix it, this patch introduce a member wq_count in tipc_net to track\nthe numbers of work queues in schedule, and wait and exit until all\nwork queues are done in tipc_exit_net()."
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"title": "tipc: wait and exit until all work queues are done",
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"cveId": "CVE-2021-47163",
"datePublished": "2024-03-25T09:16:16.676Z",
"dateReserved": "2024-03-25T09:12:14.109Z",
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"nvd": "{\"cve\":{\"id\":\"CVE-2021-47163\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-25T10:15:08.530\",\"lastModified\":\"2024-03-25T13:47:14.087\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntipc: wait and exit until all work queues are done\\n\\nOn some host, a crash could be triggered simply by repeating these\\ncommands several times:\\n\\n # modprobe tipc\\n # tipc bearer enable media udp name UDP1 localip 127.0.0.1\\n # rmmod tipc\\n\\n [] BUG: unable to handle kernel paging request at ffffffffc096bb00\\n [] Workqueue: events 0xffffffffc096bb00\\n [] Call Trace:\\n [] ? process_one_work+0x1a7/0x360\\n [] ? worker_thread+0x30/0x390\\n [] ? create_worker+0x1a0/0x1a0\\n [] ? kthread+0x116/0x130\\n [] ? kthread_flush_work_fn+0x10/0x10\\n [] ? ret_from_fork+0x35/0x40\\n\\nWhen removing the TIPC module, the UDP tunnel sock will be delayed to\\nrelease in a work queue as sock_release() can\u0027t be done in rtnl_lock().\\nIf the work queue is schedule to run after the TIPC module is removed,\\nkernel will crash as the work queue function cleanup_beareri() code no\\nlonger exists when trying to invoke it.\\n\\nTo fix it, this patch introduce a member wq_count in tipc_net to track\\nthe numbers of work queues in schedule, and wait and exit until all\\nwork queues are done in tipc_exit_net().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tipc: espere y salga hasta que todas las colas de trabajo est\u00e9n terminadas. En algunos hosts, se podr\u00eda desencadenar un bloqueo simplemente repitiendo estos comandos varias veces: # modprobe tipc # tipc portador habilitar media udp nombre UDP1 localip 127.0.0.1 # rmmod tipc [] ERROR: no se puede manejar la solicitud de paginaci\u00f3n del kernel en ffffffffc096bb00 [] Cola de trabajo: eventos 0xffffffffc096bb00 [] Seguimiento de llamadas: []? proceso_one_work+0x1a7/0x360 []? hilo_trabajador+0x30/0x390 []? crear_trabajador+0x1a0/0x1a0 []? kthread+0x116/0x130 []? kthread_flush_work_fn+0x10/0x10 []? ret_from_fork+0x35/0x40 Al retirar el m\u00f3dulo TIPC, el calcet\u00edn del t\u00fanel UDP se retrasar\u00e1 para liberarse en una cola de trabajo, ya que sock_release() no se puede realizar en rtnl_lock(). Si la cola de trabajo est\u00e1 programada para ejecutarse despu\u00e9s de eliminar el m\u00f3dulo TIPC, el kernel fallar\u00e1 porque el c\u00f3digo de la funci\u00f3n de cola de trabajo cleanup_beareri() ya no existe al intentar invocarlo. Para solucionarlo, este parche introduce un miembro wq_count en tipc_net para rastrear el n\u00famero de colas de trabajo programadas y esperar y salir hasta que todas las colas de trabajo est\u00e9n terminadas en tipc_exit_net().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/04c26faa51d1e2fe71cf13c45791f5174c37f986\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5195ec5e365a2a9331bfeb585b613a6e94f98dba\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b9f5b7ad4ac3af006443f535b1ce7bff1d130d7d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d1f76dfadaf8f47ed1753f97dbcbd41c16215ffa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.