cve-2021-47554
Vulnerability from cvelistv5
Published
2024-05-24 15:09
Modified
2024-12-19 07:44
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: vdpa_sim: avoid putting an uninitialized iova_domain The system will crash if we put an uninitialized iova_domain, this could happen when an error occurs before initializing the iova_domain in vdpasim_create(). BUG: kernel NULL pointer dereference, address: 0000000000000000 ... RIP: 0010:__cpuhp_state_remove_instance+0x96/0x1c0 ... Call Trace: <TASK> put_iova_domain+0x29/0x220 vdpasim_free+0xd1/0x120 [vdpa_sim] vdpa_release_dev+0x21/0x40 [vdpa] device_release+0x33/0x90 kobject_release+0x63/0x160 vdpasim_create+0x127/0x2a0 [vdpa_sim] vdpasim_net_dev_add+0x7d/0xfe [vdpa_sim_net] vdpa_nl_cmd_dev_add_set_doit+0xe1/0x1a0 [vdpa] genl_family_rcv_msg_doit+0x112/0x140 genl_rcv_msg+0xdf/0x1d0 ... So we must make sure the iova_domain is already initialized before put it. In addition, we may get the following warning in this case: WARNING: ... drivers/iommu/iova.c:344 iova_cache_put+0x58/0x70 So we must make sure the iova_cache_put() is invoked only if the iova_cache_get() is already invoked. Let's fix it together.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bb93ce4b150dde79f58e34103cbd1fe829796649
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e4d58ac67e63727aa45a4a26185876f598e8b3dd
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bb93ce4b150dde79f58e34103cbd1fe829796649
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e4d58ac67e63727aa45a4a26185876f598e8b3dd
Impacted products
Vendor Product Version
Linux Linux Version: 5.13
Show details on NVD website

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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47554\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-24T15:15:20.160\",\"lastModified\":\"2024-11-21T06:36:32.417\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvdpa_sim: avoid putting an uninitialized iova_domain\\n\\nThe system will crash if we put an uninitialized iova_domain, this\\ncould happen when an error occurs before initializing the iova_domain\\nin vdpasim_create().\\n\\nBUG: kernel NULL pointer dereference, address: 0000000000000000\\n...\\nRIP: 0010:__cpuhp_state_remove_instance+0x96/0x1c0\\n...\\nCall Trace:\\n \u003cTASK\u003e\\n put_iova_domain+0x29/0x220\\n vdpasim_free+0xd1/0x120 [vdpa_sim]\\n vdpa_release_dev+0x21/0x40 [vdpa]\\n device_release+0x33/0x90\\n kobject_release+0x63/0x160\\n vdpasim_create+0x127/0x2a0 [vdpa_sim]\\n vdpasim_net_dev_add+0x7d/0xfe [vdpa_sim_net]\\n vdpa_nl_cmd_dev_add_set_doit+0xe1/0x1a0 [vdpa]\\n genl_family_rcv_msg_doit+0x112/0x140\\n genl_rcv_msg+0xdf/0x1d0\\n ...\\n\\nSo we must make sure the iova_domain is already initialized before\\nput it.\\n\\nIn addition, we may get the following warning in this case:\\nWARNING: ... drivers/iommu/iova.c:344 iova_cache_put+0x58/0x70\\n\\nSo we must make sure the iova_cache_put() is invoked only if the\\niova_cache_get() is already invoked. Let\u0027s fix it together.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux se ha solucionado la siguiente vulnerabilidad: vdpa_sim: evitar poner un iova_domain no inicializado El sistema se bloquear\u00e1 si ponemos un iova_domain no inicializado, esto podr\u00eda pasar cuando ocurre un error antes de inicializar el iova_domain en vdpasim_create(). ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000000... RIP: 0010:__cpuhp_state_remove_instance+0x96/0x1c0... Seguimiento de llamadas:  put_iova_domain+0x29/0x220 vdpasim_free+0xd1/0x120 [vdpa_release_] desarrollo+0x21/0x40 [ vdpa] device_release+0x33/0x90 kobject_release+0x63/0x160 vdpasim_create+0x127/0x2a0 [vdpa_sim] vdpasim_net_dev_add+0x7d/0xfe [vdpa_sim_net] vdpa_nl_cmd_dev_add_set_doit+0xe1/0x1a0 [ vdpa] genl_family_rcv_msg_doit+0x112/0x140 genl_rcv_msg+0xdf/0x1d0 ... Entonces debemos asegurarnos de que iova_domain ya est\u00e9 inicializado antes de colocarlo. Adem\u00e1s, es posible que recibamos la siguiente advertencia en este caso: ADVERTENCIA: ... drivers/iommu/iova.c:344 iova_cache_put+0x58/0x70 Por lo tanto, debemos asegurarnos de que iova_cache_put() se invoque solo si iova_cache_get() es ya invocado. Arreglemoslo juntos.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/bb93ce4b150dde79f58e34103cbd1fe829796649\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e4d58ac67e63727aa45a4a26185876f598e8b3dd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bb93ce4b150dde79f58e34103cbd1fe829796649\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/e4d58ac67e63727aa45a4a26185876f598e8b3dd\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
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