{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "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\nblock: fix request.queuelist usage in flush\n\nFriedrich Weber reported a kernel crash problem and bisected to commit\n81ada09cc25e (\"blk-flush: reuse rq queuelist in flush state machine\").\n\nThe root cause is that we use \"list_move_tail(&rq->queuelist, pending)\"\nin the PREFLUSH/POSTFLUSH sequences. But rq->queuelist.next == xxx since\nit's popped out from plug->cached_rq in __blk_mq_alloc_requests_batch().\nWe don't initialize its queuelist just for this first request, although\nthe queuelist of all later popped requests will be initialized.\n\nFix it by changing to use \"list_add_tail(&rq->queuelist, pending)\" so\nrq->queuelist doesn't need to be initialized. It should be ok since rq\ncan't be on any list when PREFLUSH or POSTFLUSH, has no move actually.\n\nPlease note the commit 81ada09cc25e (\"blk-flush: reuse rq queuelist in\nflush state machine\") also has another requirement that no drivers would\ntouch rq->queuelist after blk_mq_end_request() since we will reuse it to\nadd rq to the post-flush pending list in POSTFLUSH. If this is not true,\nwe will have to revert that commit IMHO.\n\nThis updated version adds \"list_del_init(&rq->queuelist)\" in flush rq\ncallback since the dm layer may submit request of a weird invalid format\n(REQ_FSEQ_PREFLUSH | REQ_FSEQ_POSTFLUSH), which causes double list_add\nif without this \"list_del_init(&rq->queuelist)\". The weird invalid format\nproblem should be fixed in dm layer.", "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-2024-40925" }, { "summary":"CVE-2024-40925 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2024/csaf-openeuler-cve-2024-40925.json" }, { "summary":"openEuler-SA-2024-2076", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-2076" }, { "summary":"CVE-2024-40925", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2024-40925&packageName=kernel" } ], "title":"openEuler cve CVE-2024-40925", "tracking":{ "initial_release_date":"2024-08-30T20:25:35+08:00", "revision_history":[ { "date":"2024-08-30T20:25:35+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2024-08-30T20:25:35+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2024-08-30T20:25:35+08:00", "id":"CVE-2024-40925", "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-6.6.0-39.0.0.47.oe2403.aarch64.rpm", "name":"bpftool-6.6.0-39.0.0.47.oe2403.aarch64.rpm" }, 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But rq->queuelist.next == xxx since\nit's popped out from plug->cached_rq in __blk_mq_alloc_requests_batch().\nWe don't initialize its queuelist just for this first request, although\nthe queuelist of all later popped requests will be initialized.\n\nFix it by changing to use \"list_add_tail(&rq->queuelist, pending)\" so\nrq->queuelist doesn't need to be initialized. It should be ok since rq\ncan't be on any list when PREFLUSH or POSTFLUSH, has no move actually.\n\nPlease note the commit 81ada09cc25e (\"blk-flush: reuse rq queuelist in\nflush state machine\") also has another requirement that no drivers would\ntouch rq->queuelist after blk_mq_end_request() since we will reuse it to\nadd rq to the post-flush pending list in POSTFLUSH. If this is not true,\nwe will have to revert that commit IMHO.\n\nThis updated version adds \"list_del_init(&rq->queuelist)\" in flush rq\ncallback since the dm layer may submit request of a weird invalid format\n(REQ_FSEQ_PREFLUSH | REQ_FSEQ_POSTFLUSH), which causes double list_add\nif without this \"list_del_init(&rq->queuelist)\". The weird invalid format\nproblem should be fixed in dm layer.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS:bpftool-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:bpftool-debuginfo-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debuginfo-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debugsource-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-devel-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-headers-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-source-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-tools-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-tools-debuginfo-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-tools-devel-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:perf-6.6.0-39.0.0.47.oe2403.aarch64", 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"openEuler-24.03-LTS:kernel-6.6.0-39.0.0.47.oe2403.src" ] } ], "threats":[ { "details":"Low", "category":"impact" } ], "title":"CVE-2024-40925" } ] }