cve-2024-50019
Vulnerability from cvelistv5
Published
2024-10-21 19:39
Modified
2024-12-19 09:31
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: kthread: unpark only parked kthread Calling into kthread unparking unconditionally is mostly harmless when the kthread is already unparked. The wake up is then simply ignored because the target is not in TASK_PARKED state. However if the kthread is per CPU, the wake up is preceded by a call to kthread_bind() which expects the task to be inactive and in TASK_PARKED state, which obviously isn't the case if it is unparked. As a result, calling kthread_stop() on an unparked per-cpu kthread triggers such a warning: WARNING: CPU: 0 PID: 11 at kernel/kthread.c:525 __kthread_bind_mask kernel/kthread.c:525 <TASK> kthread_stop+0x17a/0x630 kernel/kthread.c:707 destroy_workqueue+0x136/0xc40 kernel/workqueue.c:5810 wg_destruct+0x1e2/0x2e0 drivers/net/wireguard/device.c:257 netdev_run_todo+0xe1a/0x1000 net/core/dev.c:10693 default_device_exit_batch+0xa14/0xa90 net/core/dev.c:11769 ops_exit_list net/core/net_namespace.c:178 [inline] cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:640 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Fix this with skipping unecessary unparking while stopping a kthread.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19a5029981c87c2ad0845e713837faa88f5d8e2bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/214e01ad4ed7158cab66498810094fac5d09b218Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/40a6e660d2a3a7a5cb99f0b8ff4fb41bad039f68Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8608196a155cb6cfae04d96b10a2652d0327e33fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cda5423c1a1c906062ef235c940f249b97d9d135Patch
Impacted products
Vendor Product Version
Linux Linux Version: 5c25b5ff89f004c30b04759dc34ace8585a4085f
Version: 5c25b5ff89f004c30b04759dc34ace8585a4085f
Version: 5c25b5ff89f004c30b04759dc34ace8585a4085f
Version: 5c25b5ff89f004c30b04759dc34ace8585a4085f
Version: 5c25b5ff89f004c30b04759dc34ace8585a4085f
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   Linux Linux Version: 5.11
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The wake up is then simply ignored\\nbecause the target is not in TASK_PARKED state.\\n\\nHowever if the kthread is per CPU, the wake up is preceded by a call\\nto kthread_bind() which expects the task to be inactive and in\\nTASK_PARKED state, which obviously isn't the case if it is unparked.\\n\\nAs a result, calling kthread_stop() on an unparked per-cpu kthread\\ntriggers such a warning:\\n\\n\\tWARNING: CPU: 0 PID: 11 at kernel/kthread.c:525 __kthread_bind_mask kernel/kthread.c:525\\n\\t <TASK>\\n\\t kthread_stop+0x17a/0x630 kernel/kthread.c:707\\n\\t destroy_workqueue+0x136/0xc40 kernel/workqueue.c:5810\\n\\t wg_destruct+0x1e2/0x2e0 drivers/net/wireguard/device.c:257\\n\\t netdev_run_todo+0xe1a/0x1000 net/core/dev.c:10693\\n\\t default_device_exit_batch+0xa14/0xa90 net/core/dev.c:11769\\n\\t ops_exit_list net/core/net_namespace.c:178 [inline]\\n\\t cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:640\\n\\t process_one_work kernel/workqueue.c:3231 [inline]\\n\\t process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312\\n\\t worker_thread+0x86d/0xd70 kernel/workqueue.c:3393\\n\\t kthread+0x2f0/0x390 kernel/kthread.c:389\\n\\t ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147\\n\\t ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\\n\\t </TASK>\\n\\nFix this with skipping unecessary unparking while stopping a kthread.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: kthread: unpark solo kthread aparcado Llamar a kthread unparking incondicionalmente es mayormente inofensivo cuando el kthread ya está desestacionado. Luego, la activación simplemente se ignora porque el objetivo no está en estado TASK_PARKED. Sin embargo, si el kthread es por CPU, la activación está precedida por una llamada a kthread_bind() que espera que la tarea esté inactiva y en estado TASK_PARKED, lo que obviamente no es el caso si está desestacionada. Como resultado, llamar a kthread_stop() en un kthread por CPU no estacionado activa esta advertencia: ADVERTENCIA: CPU: 0 PID: 11 en kernel/kthread.c:525 __kthread_bind_mask kernel/kthread.c:525  kthread_stop+0x17a/0x630 kernel/kthread.c:707 destroy_workqueue+0x136/0xc40 kernel/workqueue.c:5810 wg_destruct+0x1e2/0x2e0 drivers/net/wireguard/device.c:257 netdev_run_todo+0xe1a/0x1000 net/core/dev.c:10693 default_device_exit_batch+0xa14/0xa90 net/core/dev.c:11769 ops_exit_list net/core/net_namespace.c:178 [en línea] cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:640 process_one_work kernel/workqueue.c:3231 [en línea] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244  Solucione esto omitiendo el desestacionamiento innecesario mientras Detener un kthread.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.168\",\"matchCriteriaId\":\"4D51C05D-455B-4D8D-89E7-A58E140B864C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.113\",\"matchCriteriaId\":\"D01BD22E-ACD1-4618-9D01-6116570BE1EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.57\",\"matchCriteriaId\":\"05D83DB8-7465-4F88-AFB2-980011992AC1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.11.4\",\"matchCriteriaId\":\"AA84D336-CE9A-4535-B901-1AD77EC17C34\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"7F361E1D-580F-4A2D-A509-7615F73167A1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"925478D0-3E3D-4E6F-ACD5-09F28D5DF82C\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/19a5029981c87c2ad0845e713837faa88f5d8e2b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/214e01ad4ed7158cab66498810094fac5d09b218\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/40a6e660d2a3a7a5cb99f0b8ff4fb41bad039f68\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8608196a155cb6cfae04d96b10a2652d0327e33f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cda5423c1a1c906062ef235c940f249b97d9d135\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
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}


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  • 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.