CVE-2022-48808

{"id": "CVE-2022-48808", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-07-16T12:15:05.120", "references": [{"url": "https://git.kernel.org/stable/c/89b60402d43cdab4387dbbf24afebda5cf092ae7", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ee534378f00561207656663d93907583958339ae", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ff45899e732e57088985e3a497b1d9100571c0f5", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: fix panic when DSA master device unbinds on shutdown\n\nRafael reports that on a system with LX2160A and Marvell DSA switches,\nif a reboot occurs while the DSA master (dpaa2-eth) is up, the following\npanic can be seen:\n\nsystemd-shutdown[1]: Rebooting.\nUnable to handle kernel paging request at virtual address 00a0000800000041\n[00a0000800000041] address between user and kernel address ranges\nInternal error: Oops: 96000004 [#1] PREEMPT SMP\nCPU: 6 PID: 1 Comm: systemd-shutdow Not tainted 5.16.5-00042-g8f5585009b24 #32\npc : dsa_slave_netdevice_event+0x130/0x3e4\nlr : raw_notifier_call_chain+0x50/0x6c\nCall trace:\n dsa_slave_netdevice_event+0x130/0x3e4\n raw_notifier_call_chain+0x50/0x6c\n call_netdevice_notifiers_info+0x54/0xa0\n __dev_close_many+0x50/0x130\n dev_close_many+0x84/0x120\n unregister_netdevice_many+0x130/0x710\n unregister_netdevice_queue+0x8c/0xd0\n unregister_netdev+0x20/0x30\n dpaa2_eth_remove+0x68/0x190\n fsl_mc_driver_remove+0x20/0x5c\n __device_release_driver+0x21c/0x220\n device_release_driver_internal+0xac/0xb0\n device_links_unbind_consumers+0xd4/0x100\n __device_release_driver+0x94/0x220\n device_release_driver+0x28/0x40\n bus_remove_device+0x118/0x124\n device_del+0x174/0x420\n fsl_mc_device_remove+0x24/0x40\n __fsl_mc_device_remove+0xc/0x20\n device_for_each_child+0x58/0xa0\n dprc_remove+0x90/0xb0\n fsl_mc_driver_remove+0x20/0x5c\n __device_release_driver+0x21c/0x220\n device_release_driver+0x28/0x40\n bus_remove_device+0x118/0x124\n device_del+0x174/0x420\n fsl_mc_bus_remove+0x80/0x100\n fsl_mc_bus_shutdown+0xc/0x1c\n platform_shutdown+0x20/0x30\n device_shutdown+0x154/0x330\n __do_sys_reboot+0x1cc/0x250\n __arm64_sys_reboot+0x20/0x30\n invoke_syscall.constprop.0+0x4c/0xe0\n do_el0_svc+0x4c/0x150\n el0_svc+0x24/0xb0\n el0t_64_sync_handler+0xa8/0xb0\n el0t_64_sync+0x178/0x17c\n\nIt can be seen from the stack trace that the problem is that the\nderegistration of the master causes a dev_close(), which gets notified\nas NETDEV_GOING_DOWN to dsa_slave_netdevice_event().\nBut dsa_switch_shutdown() has already run, and this has unregistered the\nDSA slave interfaces, and yet, the NETDEV_GOING_DOWN handler attempts to\ncall dev_close_many() on those slave interfaces, leading to the problem.\n\nThe previous attempt to avoid the NETDEV_GOING_DOWN on the master after\ndsa_switch_shutdown() was called seems improper. Unregistering the slave\ninterfaces is unnecessary and unhelpful. Instead, after the slaves have\nstopped being uppers of the DSA master, we can now reset to NULL the\nmaster->dsa_ptr pointer, which will make DSA start ignoring all future\nnotifier events on the master."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: dsa: corrige el p\u00e1nico cuando el dispositivo maestro DSA se desvincula al apagar Rafael informa que en un sistema con conmutadores LX2160A y Marvell DSA, si se produce un reinicio mientras el DSA maestro (dpaa2-eth ) est\u00e1 activo, se puede ver el siguiente p\u00e1nico: systemd-shutdown[1]: Rebooting. No se puede manejar la solicitud de paginaci\u00f3n del kernel en la direcci\u00f3n virtual 00a0000800000041 [00a0000800000041] direcci\u00f3n entre los rangos de direcciones del usuario y del kernel Error interno: Ups: 96000004 [#1] CPU SMP PREEMPT: 6 PID: 1 Comm: systemd-shutdow No est\u00e1 contaminado 5.16.5-00042 -g8f5585009b24 #32 pc: dsa_slave_netdevice_event+0x130/0x3e4 lr: raw_notifier_call_chain+0x50/0x6c Rastreo de llamadas: dsa_slave_netdevice_event+0x130/0x3e4 raw_notifier_call_chain+0x50/0x6c call_netdevice_notifiers_info+ 0x54/0xa0 __dev_close_many+0x50/0x130 dev_close_many+0x84/0x120 unregister_netdevice_many+0x130/ 0x710 unregister_netdevice_queue+0x8c/0xd0 unregister_netdev+0x20/0x30 dpaa2_eth_remove+0x68/0x190 fsl_mc_driver_remove+0x20/0x5c __device_release_driver+0x21c/0x220 dispositivo_release_driver_internal+0xac/0x b0 device_links_unbind_consumers+0xd4/0x100 __device_release_driver+0x94/0x220 dispositivo_release_driver+0x28/0x40 bus_remove_device+0x118/ 0x124 dispositivo_del+0x174/0x420 fsl_mc_device_remove+0x24/0x40 __fsl_mc_device_remove+0xc/0x20 dispositivo_para_cada_ni\u00f1o+0x58/0xa0 dprc_remove+0x90/0xb0 fsl_mc_driver_remove+0x20/0x5c __ dispositivo_liberaci\u00f3n_controlador+0x21c/0x220 dispositivo_liberaci\u00f3n_controlador+0x28/0x40 bus_remove_device+0x118/0x124 dispositivo_del+0x174/ 0x420 fsl_mc_bus_remove+0x80/0x100 fsl_mc_bus_shutdown+0xc/0x1c platform_shutdown+0x20/0x30 dispositivo_shutdown+0x154/0x330 __do_sys_reboot+0x1cc/0x250 __arm64_sys_reboot+0x20/0x30 invoke_syscall.constprop.0+0x4c/0xe0 do_el0_svc+0x4c/0x150 el0_svc+0x24/0xb0 el0t_64_sync_handler+0xa8/0xb0 el0t_64_sync+0x178/0x17c Se puede ver en el seguimiento de la pila que el problema es que la cancelaci\u00f3n del registro del maestro provoca un dev_close(), que se notifica como NETDEV_GOING_DOWN a dsa_slave_netdevice_event(). Pero dsa_switch_shutdown() ya se ejecut\u00f3, y esto anul\u00f3 el registro de las interfaces esclavas DSA y, a\u00fan as\u00ed, el controlador NETDEV_GOING_DOWN intenta llamar a dev_close_many() en esas interfaces esclavas, lo que genera el problema. El intento anterior de evitar NETDEV_GOING_DOWN en el maestro despu\u00e9s de llamar a dsa_switch_shutdown() parece inadecuado. Anular el registro de las interfaces esclavas es innecesario e in\u00fatil. En cambio, despu\u00e9s de que los esclavos hayan dejado de ser superiores al maestro DSA, ahora podemos restablecer a NULL el puntero maestro->dsa_ptr, lo que har\u00e1 que DSA comience a ignorar todos los eventos notificadores futuros en el maestro."}], "lastModified": "2024-08-07T19:19:55.520", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5EA785B4-F15F-4577-975F-43739EC89827", "versionEndExcluding": "5.15.155", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "679523BA-1392-404B-AB85-F5A5408B1ECC", "versionEndExcluding": "5.16.10", "versionStartIncluding": "5.16"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}