{"id":"AZL-56229","summary":"CVE-2024-47143 affecting package kernel for versions less than 5.15.176.3-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndma-debug: fix a possible deadlock on radix_lock\n\nradix_lock() shouldn't be held while holding dma_hash_entry[idx].lock\notherwise, there's a possible deadlock scenario when\ndma debug API is called holding rq_lock():\n\nCPU0                   CPU1                       CPU2\ndma_free_attrs()\ncheck_unmap()          add_dma_entry()            __schedule() //out\n                                                  (A) rq_lock()\nget_hash_bucket()\n(A) dma_entry_hash\n                                                  check_sync()\n                       (A) radix_lock()           (W) dma_entry_hash\ndma_entry_free()\n(W) radix_lock()\n                       // CPU2's one\n                       (W) rq_lock()\n\nCPU1 situation can happen when it extending radix tree and\nit tries to wake up kswapd via wake_all_kswapd().\n\nCPU2 situation can happen while perf_event_task_sched_out()\n(i.e. dma sync operation is called while deleting perf_event using\n etm and etr tmc which are Arm Coresight hwtracing driver backends).\n\nTo remove this possible situation, call dma_entry_free() after\nput_hash_bucket() in check_unmap().","modified":"2026-04-01T05:18:50.213077Z","published":"2025-01-11T13:15:22Z","upstream":["CVE-2024-47143"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-47143"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.176.3-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-56229.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}