{"id":"CVE-2026-89753","summary":"mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()\n\nI am seeing some rcu_tasks stalls in the Meta fleet during reclaim.\n\n  INFO: rcu_tasks detected stalls on tasks:\n\t0000000088620d09: .. nvcsw: 6735/6735 holdout: 1 idle_cpu: -1/8\n\ttask:GlobalCPUThread state:R  running task  pid:2552016 tgid:2524552\n  Call Trace:\n   shrink_lruvec\n   mem_cgroup_iter\n   shrink_node\n   do_try_to_free_pages\n   try_to_free_pages\n   __alloc_frozen_pages_noprof\n   alloc_pages_noprof\n   pte_alloc_one\n   __pte_alloc\n   handle_mm_fault\n\nNothing promises direct reclaim returns in bounded time, and the scan loop\nin shrink_lruvec() only calls cond_resched(), which is a no-op on\nPREEMPTION kernels.  Involuntary preemption is not a Tasks-RCU quiescent\nstate, so the reclaiming task never reports one and becomes a holdout.\n\nUpgrade it to cond_resched_tasks_rcu_qs(), which reports a quiescent state\neven when cond_resched() does nothing.\n\nPS: This has been discussed in [1]","modified":"2026-09-25T18:26:50.656033486Z","published":"2026-09-11T19:46:56.806Z","related":["openSUSE-SU-2026:11880-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89753.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/029c9408049f7f582230322057b7075bea594fd5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/25f52e81216884a7444bf07a606691feb09a94e3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3fd50239986302cb050d3649351bcec00fa9d5ab"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4cdc1bdf40944de5c6b118fef07ad23f07844338"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b5391676c61d94ffe3272dcf6723738b802f79e8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cf3ba0911a1cf8680371ff113b90088edd01d2bb"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89753.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89753"},{"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":"8315f42295d2667a7f942f154b73a86fd7cb2227"},{"fixed":"4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57"},{"fixed":"4cdc1bdf40944de5c6b118fef07ad23f07844338"},{"fixed":"a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b"},{"fixed":"029c9408049f7f582230322057b7075bea594fd5"},{"fixed":"b5391676c61d94ffe3272dcf6723738b802f79e8"},{"fixed":"3fd50239986302cb050d3649351bcec00fa9d5ab"},{"fixed":"cf3ba0911a1cf8680371ff113b90088edd01d2bb"},{"fixed":"25f52e81216884a7444bf07a606691feb09a94e3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-89753.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.18.0"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.109"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-89753.json"}}],"schema_version":"1.9.0"}