ghsa-g29r-ch4v-q6cx
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
dma-debug: fix a possible deadlock on radix_lock
radix_lock() shouldn't be held while holding dma_hash_entry[idx].lock otherwise, there's a possible deadlock scenario when dma debug API is called holding rq_lock():
CPU0 CPU1 CPU2 dma_free_attrs() check_unmap() add_dma_entry() __schedule() //out (A) rq_lock() get_hash_bucket() (A) dma_entry_hash check_sync() (A) radix_lock() (W) dma_entry_hash dma_entry_free() (W) radix_lock() // CPU2's one (W) rq_lock()
CPU1 situation can happen when it extending radix tree and it tries to wake up kswapd via wake_all_kswapd().
CPU2 situation can happen while perf_event_task_sched_out() (i.e. dma sync operation is called while deleting perf_event using etm and etr tmc which are Arm Coresight hwtracing driver backends).
To remove this possible situation, call dma_entry_free() after put_hash_bucket() in check_unmap().
{
"affected": [],
"aliases": [
"CVE-2024-47143"
],
"database_specific": {
"cwe_ids": [
"CWE-667"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-11T13:15:22Z",
"severity": "MODERATE"
},
"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\u0027t be held while holding dma_hash_entry[idx].lock\notherwise, there\u0027s 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\u0027s 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().",
"id": "GHSA-g29r-ch4v-q6cx",
"modified": "2025-02-03T15:32:01Z",
"published": "2025-01-11T15:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47143"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3ccce34a5c3f5c9541108a451657ade621524b32"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7543c3e3b9b88212fcd0aaf5cab5588797bdc7de"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8c1b4fea8d62285f5e1a8194889b39661608bd8a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c212d91070beca0d03fef7bf988baf4ff4b3eee4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/efe1b9bbf356357fdff0399af361133d6e3ba18e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f2b95248a16c5186d1c658fc0aeb2f3bd95e5259"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
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