{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: cancel nfsd_shrinker_work using sync mode in nfs4_state_shutdown_net\n\nIn the normal case, when we excute `echo 0 > /proc/fs/nfsd/threads`, the\nfunction `nfs4_state_destroy_net` in `nfs4_state_shutdown_net` will\nrelease all resources related to the hashed `nfs4_client`. If the\n`nfsd_client_shrinker` is running concurrently, the `expire_client`\nfunction will first unhash this client and then destroy it. This can\nlead to the following warning. Additionally, numerous use-after-free\nerrors may occur as well.\n\nnfsd_client_shrinker echo 0 > /proc/fs/nfsd/threads\n\nexpire_client nfsd_shutdown_net\n unhash_client ...\n nfs4_state_shutdown_net\n /* won't wait shrinker exit */\n /* cancel_work(&nn->nfsd_shrinker_work)\n * nfsd_file for this /* won't destroy unhashed client1 */\n * client1 still alive nfs4_state_destroy_net\n */\n\n nfsd_file_cache_shutdown\n /* trigger warning */\n kmem_cache_destroy(nfsd_file_slab)\n kmem_cache_destroy(nfsd_file_mark_slab)\n /* release nfsd_file and mark */\n __destroy_client\n\n====================================================================\nBUG nfsd_file (Not tainted): Objects remaining in nfsd_file on\n__kmem_cache_shutdown()\n--------------------------------------------------------------------\nCPU: 4 UID: 0 PID: 764 Comm: sh Not tainted 6.12.0-rc3+ #1\n\n dump_stack_lvl+0x53/0x70\n slab_err+0xb0/0xf0\n __kmem_cache_shutdown+0x15c/0x310\n kmem_cache_destroy+0x66/0x160\n nfsd_file_cache_shutdown+0xac/0x210 [nfsd]\n nfsd_destroy_serv+0x251/0x2a0 [nfsd]\n nfsd_svc+0x125/0x1e0 [nfsd]\n write_threads+0x16a/0x2a0 [nfsd]\n nfsctl_transaction_write+0x74/0xa0 [nfsd]\n vfs_write+0x1a5/0x6d0\n ksys_write+0xc1/0x160\n do_syscall_64+0x5f/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n====================================================================\nBUG nfsd_file_mark (Tainted: G B W ): Objects remaining\nnfsd_file_mark on __kmem_cache_shutdown()\n--------------------------------------------------------------------\n\n dump_stack_lvl+0x53/0x70\n slab_err+0xb0/0xf0\n __kmem_cache_shutdown+0x15c/0x310\n kmem_cache_destroy+0x66/0x160\n nfsd_file_cache_shutdown+0xc8/0x210 [nfsd]\n nfsd_destroy_serv+0x251/0x2a0 [nfsd]\n nfsd_svc+0x125/0x1e0 [nfsd]\n write_threads+0x16a/0x2a0 [nfsd]\n nfsctl_transaction_write+0x74/0xa0 [nfsd]\n vfs_write+0x1a5/0x6d0\n ksys_write+0xc1/0x160\n do_syscall_64+0x5f/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nTo resolve this issue, cancel `nfsd_shrinker_work` using synchronous\nmode in nfs4_state_shutdown_net.", "category":"general", "title":"Synopsis" } ], "publisher":{ "issuing_authority":"openEuler security committee", "name":"openEuler", "namespace":"https://www.openeuler.org", "contact_details":"openeuler-security@openeuler.org", "category":"vendor" }, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2024-50121" }, { "summary":"CVE-2024-50121 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2024/csaf-openeuler-cve-2024-50121.json" }, { "summary":"openEuler-SA-2024-2590", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-2590" }, { "summary":"CVE-2024-50121", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2024-50121&packageName=kernel" } ], "title":"openEuler cve CVE-2024-50121", "tracking":{ "initial_release_date":"2024-12-27T20:33:52+08:00", "revision_history":[ { "date":"2024-12-27T20:33:52+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2024-12-27T20:33:52+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2024-12-27T20:33:52+08:00", "id":"CVE-2024-50121", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS" }, "product_id":"openEuler-24.03-LTS", "name":"openEuler-24.03-LTS" }, "name":"openEuler-24.03-LTS", "category":"product_version" } ], "category":"product_name" }, { "name":"aarch64", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS" }, "product_id":"bpftool-6.6.0-72.0.0.64.oe2403.aarch64.rpm", "name":"bpftool-6.6.0-72.0.0.64.oe2403.aarch64.rpm" }, 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If the\n`nfsd_client_shrinker` is running concurrently, the `expire_client`\nfunction will first unhash this client and then destroy it. This can\nlead to the following warning. Additionally, numerous use-after-free\nerrors may occur as well.\n\nnfsd_client_shrinker echo 0 > /proc/fs/nfsd/threads\n\nexpire_client nfsd_shutdown_net\n unhash_client ...\n nfs4_state_shutdown_net\n /* won't wait shrinker exit */\n /* cancel_work(&nn->nfsd_shrinker_work)\n * nfsd_file for this /* won't destroy unhashed client1 */\n * client1 still alive nfs4_state_destroy_net\n */\n\n nfsd_file_cache_shutdown\n /* trigger warning */\n kmem_cache_destroy(nfsd_file_slab)\n kmem_cache_destroy(nfsd_file_mark_slab)\n /* release nfsd_file and mark */\n __destroy_client\n\n====================================================================\nBUG nfsd_file (Not tainted): Objects remaining in nfsd_file on\n__kmem_cache_shutdown()\n--------------------------------------------------------------------\nCPU: 4 UID: 0 PID: 764 Comm: sh Not tainted 6.12.0-rc3+ #1\n\n dump_stack_lvl+0x53/0x70\n slab_err+0xb0/0xf0\n __kmem_cache_shutdown+0x15c/0x310\n kmem_cache_destroy+0x66/0x160\n nfsd_file_cache_shutdown+0xac/0x210 [nfsd]\n nfsd_destroy_serv+0x251/0x2a0 [nfsd]\n nfsd_svc+0x125/0x1e0 [nfsd]\n write_threads+0x16a/0x2a0 [nfsd]\n nfsctl_transaction_write+0x74/0xa0 [nfsd]\n vfs_write+0x1a5/0x6d0\n ksys_write+0xc1/0x160\n do_syscall_64+0x5f/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n====================================================================\nBUG nfsd_file_mark (Tainted: G B W ): Objects remaining\nnfsd_file_mark on __kmem_cache_shutdown()\n--------------------------------------------------------------------\n\n dump_stack_lvl+0x53/0x70\n slab_err+0xb0/0xf0\n __kmem_cache_shutdown+0x15c/0x310\n kmem_cache_destroy+0x66/0x160\n nfsd_file_cache_shutdown+0xc8/0x210 [nfsd]\n nfsd_destroy_serv+0x251/0x2a0 [nfsd]\n nfsd_svc+0x125/0x1e0 [nfsd]\n write_threads+0x16a/0x2a0 [nfsd]\n nfsctl_transaction_write+0x74/0xa0 [nfsd]\n vfs_write+0x1a5/0x6d0\n ksys_write+0xc1/0x160\n do_syscall_64+0x5f/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nTo resolve this issue, cancel `nfsd_shrinker_work` using synchronous\nmode in nfs4_state_shutdown_net.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS:bpftool-6.6.0-72.0.0.64.oe2403.aarch64", "openEuler-24.03-LTS:bpftool-debuginfo-6.6.0-72.0.0.64.oe2403.aarch64", "openEuler-24.03-LTS:kernel-6.6.0-72.0.0.64.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debuginfo-6.6.0-72.0.0.64.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debugsource-6.6.0-72.0.0.64.oe2403.aarch64", "openEuler-24.03-LTS:kernel-devel-6.6.0-72.0.0.64.oe2403.aarch64", "openEuler-24.03-LTS:kernel-headers-6.6.0-72.0.0.64.oe2403.aarch64", "openEuler-24.03-LTS:kernel-source-6.6.0-72.0.0.64.oe2403.aarch64", "openEuler-24.03-LTS:kernel-tools-6.6.0-72.0.0.64.oe2403.aarch64", "openEuler-24.03-LTS:kernel-tools-debuginfo-6.6.0-72.0.0.64.oe2403.aarch64", "openEuler-24.03-LTS:kernel-tools-devel-6.6.0-72.0.0.64.oe2403.aarch64", 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