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

Vulnerability from cvelistv5 – Published: 2026-01-31 11:38 – Updated: 2026-05-11 21:56
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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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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{
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          "product": "Linux",
          "programFiles": [
            "drivers/android/binder/page_range.rs"
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          "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": "2026-05-11T21:56:13.676Z",
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    "datePublished": "2026-01-31T11:38:54.221Z",
    "dateReserved": "2026-01-31T11:36:51.185Z",
    "dateUpdated": "2026-05-11T21:56:13.676Z",
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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 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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:12:55+00:00",
      "cve": "CVE-2025-71181",
      "id": "CVE-2025-71181",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: rust_binder: remove spin_lock() in rust_shrink_free_page()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71181.json",
      "version": "3"
    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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