CVE-2025-71181 (GCVE-0-2025-71181)

Vulnerability from cvelistv5 – Published: 2026-01-31 11:38 – Updated: 2026-02-09 08:36
VLAI?
Title
rust_binder: remove spin_lock() in rust_shrink_free_page()
Summary
In the Linux kernel, the following vulnerability has been resolved: rust_binder: remove spin_lock() in rust_shrink_free_page() When forward-porting Rust Binder to 6.18, I neglected to take commit fb56fdf8b9a2 ("mm/list_lru: split the lock to per-cgroup scope") into account, and apparently I did not end up running the shrinker callback when I sanity tested the driver before submission. This leads to crashes like the following: ============================================ WARNING: possible recursive locking detected 6.18.0-mainline-maybe-dirty #1 Tainted: G IO -------------------------------------------- kswapd0/68 is trying to acquire lock: ffff956000fa18b0 (&l->lock){+.+.}-{2:2}, at: lock_list_lru_of_memcg+0x128/0x230 but task is already holding lock: ffff956000fa18b0 (&l->lock){+.+.}-{2:2}, at: rust_helper_spin_lock+0xd/0x20 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&l->lock); lock(&l->lock); *** DEADLOCK *** May be due to missing lock nesting notation 3 locks held by kswapd0/68: #0: ffffffff90d2e260 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0x597/0x1160 #1: ffff956000fa18b0 (&l->lock){+.+.}-{2:2}, at: rust_helper_spin_lock+0xd/0x20 #2: ffffffff90cf3680 (rcu_read_lock){....}-{1:2}, at: lock_list_lru_of_memcg+0x2d/0x230 To fix this, remove the spin_lock() call from rust_shrink_free_page().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: eafedbc7c050c44744fbdf80bdf3315e860b7513 , < 30a98c97f7874031f2e1de19c777ce011143cba4 (git)
Affected: eafedbc7c050c44744fbdf80bdf3315e860b7513 , < 361e0ff456a8daf9753c18030533256e4133ce7a (git)
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    Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/android/binder/page_range.rs"
          ],
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          "vendor": "Linux",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrust_binder: remove spin_lock() in rust_shrink_free_page()\n\nWhen forward-porting Rust Binder to 6.18, I neglected to take commit\nfb56fdf8b9a2 (\"mm/list_lru: split the lock to per-cgroup scope\") into\naccount, and apparently I did not end up running the shrinker callback\nwhen I sanity tested the driver before submission. This leads to crashes\nlike the following:\n\n\t============================================\n\tWARNING: possible recursive locking detected\n\t6.18.0-mainline-maybe-dirty #1 Tainted: G          IO\n\t--------------------------------------------\n\tkswapd0/68 is trying to acquire lock:\n\tffff956000fa18b0 (\u0026l-\u003elock){+.+.}-{2:2}, at: lock_list_lru_of_memcg+0x128/0x230\n\n\tbut task is already holding lock:\n\tffff956000fa18b0 (\u0026l-\u003elock){+.+.}-{2:2}, at: rust_helper_spin_lock+0xd/0x20\n\n\tother info that might help us debug this:\n\t Possible unsafe locking scenario:\n\n\t       CPU0\n\t       ----\n\t  lock(\u0026l-\u003elock);\n\t  lock(\u0026l-\u003elock);\n\n\t *** DEADLOCK ***\n\n\t May be due to missing lock nesting notation\n\n\t3 locks held by kswapd0/68:\n\t #0: ffffffff90d2e260 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0x597/0x1160\n\t #1: ffff956000fa18b0 (\u0026l-\u003elock){+.+.}-{2:2}, at: rust_helper_spin_lock+0xd/0x20\n\t #2: ffffffff90cf3680 (rcu_read_lock){....}-{1:2}, at: lock_list_lru_of_memcg+0x2d/0x230\n\nTo fix this, remove the spin_lock() call from rust_shrink_free_page()."
        }
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        "dateUpdated": "2026-02-09T08:36:05.247Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/361e0ff456a8daf9753c18030533256e4133ce7a"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71181",
    "datePublished": "2026-01-31T11:38:54.221Z",
    "dateReserved": "2026-01-31T11:36:51.185Z",
    "dateUpdated": "2026-02-09T08:36:05.247Z",
    "state": "PUBLISHED"
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This leads to crashes\\nlike the following:\\n\\n\\t============================================\\n\\tWARNING: possible recursive locking detected\\n\\t6.18.0-mainline-maybe-dirty #1 Tainted: G          IO\\n\\t--------------------------------------------\\n\\tkswapd0/68 is trying to acquire lock:\\n\\tffff956000fa18b0 (\u0026l-\u003elock){+.+.}-{2:2}, at: lock_list_lru_of_memcg+0x128/0x230\\n\\n\\tbut task is already holding lock:\\n\\tffff956000fa18b0 (\u0026l-\u003elock){+.+.}-{2:2}, at: rust_helper_spin_lock+0xd/0x20\\n\\n\\tother info that might help us debug this:\\n\\t Possible unsafe locking scenario:\\n\\n\\t       CPU0\\n\\t       ----\\n\\t  lock(\u0026l-\u003elock);\\n\\t  lock(\u0026l-\u003elock);\\n\\n\\t *** DEADLOCK ***\\n\\n\\t May be due to missing lock nesting notation\\n\\n\\t3 locks held by kswapd0/68:\\n\\t #0: ffffffff90d2e260 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0x597/0x1160\\n\\t #1: ffff956000fa18b0 (\u0026l-\u003elock){+.+.}-{2:2}, at: rust_helper_spin_lock+0xd/0x20\\n\\t #2: ffffffff90cf3680 (rcu_read_lock){....}-{1:2}, at: lock_list_lru_of_memcg+0x2d/0x230\\n\\nTo fix this, remove the spin_lock() call from rust_shrink_free_page().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nrust_binder: eliminar spin_lock() en rust_shrink_free_page()\\n\\nAl portar Rust Binder a la versi\u00f3n 6.18, descuid\u00e9 tener en cuenta el commit fb56fdf8b9a2 (\u0027mm/list_lru: split the lock to per-cgroup scope\u0027), y aparentemente no termin\u00e9 ejecutando la devoluci\u00f3n de llamada del reductor cuando prob\u00e9 la cordura del controlador antes de la entrega. Esto lleva a fallos como el siguiente:\\n\\n\\t============================================\\n\\tADVERTENCIA: posible bloqueo recursivo detectado\\n\\t6.18.0-mainline-maybe-dirty #1 Tainted: G          IO\\n\\t--------------------------------------------\\n\\tkswapd0/68 est\u00e1 intentando adquirir el bloqueo:\\n\\tffff956000fa18b0 (\u0026amp;l-\u0026gt;lock){+.+.}-{2:2}, en: lock_list_lru_of_memcg+0x128/0x230\\n\\n\\tpero la tarea ya est\u00e1 manteniendo el bloqueo:\\n\\tffff956000fa18b0 (\u0026amp;l-\u0026gt;lock){+.+.}-{2:2}, en: rust_helper_spin_lock+0xd/0x20\\n\\n\\totra informaci\u00f3n que podr\u00eda ayudarnos a depurar esto:\\n\\t Posible escenario de bloqueo inseguro:\\n\\n\\t       CPU0\\n\\t       ----\\n\\t  lock(\u0026amp;l-\u0026gt;lock);\\n\\t  lock(\u0026amp;l-\u0026gt;lock);\\n\\n\\t * INTERBLOQUEO *\\n\\n\\t Puede deberse a la falta de notaci\u00f3n de anidamiento de bloqueo\\n\\n\\t3 bloqueos mantenidos por kswapd0/68:\\n\\t #0: ffffffff90d2e260 (fs_reclaim){+.+.}-{0:0}, en: kswapd+0x597/0x1160\\n\\t #1: ffff956000fa18b0 (\u0026amp;l-\u0026gt;lock){+.+.}-{2:2}, en: rust_helper_spin_lock+0xd/0x20\\n\\t #2: ffffffff90cf3680 (rcu_read_lock){....}-{1:2}, en: lock_list_lru_of_memcg+0x2d/0x230\\n\\nPara solucionar esto, elimine la llamada a spin_lock() de rust_shrink_free_page().\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.18.1\",\"versionEndExcluding\":\"6.18.6\",\"matchCriteriaId\":\"244757F1-F957-45E1-ADDD-D008246BCF53\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.18:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"DCE57113-2223-4308-A0F2-5E6ECFBB3C23\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F71D92C0-C023-48BD-B3B6-70B638EEE298\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"13580667-0A98-40CC-B29F-D12790B91BDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*\",\"matchCriteriaId\":\"EB5B7DFC-C36B-45D8-922C-877569FDDF43\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/30a98c97f7874031f2e1de19c777ce011143cba4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/361e0ff456a8daf9753c18030533256e4133ce7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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