{"id":"CVE-2025-71181","summary":"rust_binder: remove spin_lock() in rust_shrink_free_page()","details":"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 (&l-\u003elock){+.+.}-{2:2}, at: lock_list_lru_of_memcg+0x128/0x230\n\n\tbut task is already holding lock:\n\tffff956000fa18b0 (&l-\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(&l-\u003elock);\n\t  lock(&l-\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 (&l-\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().","modified":"2026-08-12T03:51:41.331854579Z","published":"2026-01-31T11:38:54.221Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71181.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/30a98c97f7874031f2e1de19c777ce011143cba4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/361e0ff456a8daf9753c18030533256e4133ce7a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71181.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-71181"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"eafedbc7c050c44744fbdf80bdf3315e860b7513"},{"fixed":"30a98c97f7874031f2e1de19c777ce011143cba4"},{"fixed":"361e0ff456a8daf9753c18030533256e4133ce7a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71181.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71181.json"}}],"schema_version":"1.9.0"}