{"id":"CVE-2022-50771","summary":"rcu: Fix __this_cpu_read() lockdep warning in rcu_force_quiescent_state()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nrcu: Fix __this_cpu_read() lockdep warning in rcu_force_quiescent_state()\n\nRunning rcutorture with non-zero fqs_duration module parameter in a\nkernel built with CONFIG_PREEMPTION=y results in the following splat:\n\nBUG: using __this_cpu_read() in preemptible [00000000]\ncode: rcu_torture_fqs/398\ncaller is __this_cpu_preempt_check+0x13/0x20\nCPU: 3 PID: 398 Comm: rcu_torture_fqs Not tainted 6.0.0-rc1-yoctodev-standard+\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x5b/0x86\ndump_stack+0x10/0x16\ncheck_preemption_disabled+0xe5/0xf0\n__this_cpu_preempt_check+0x13/0x20\nrcu_force_quiescent_state.part.0+0x1c/0x170\nrcu_force_quiescent_state+0x1e/0x30\nrcu_torture_fqs+0xca/0x160\n? rcu_torture_boost+0x430/0x430\nkthread+0x192/0x1d0\n? kthread_complete_and_exit+0x30/0x30\nret_from_fork+0x22/0x30\n\u003c/TASK\u003e\n\nThe problem is that rcu_force_quiescent_state() uses __this_cpu_read()\nin preemptible code instead of the proper raw_cpu_read().  This commit\ntherefore changes __this_cpu_read() to raw_cpu_read().","modified":"2026-04-02T08:28:45.705131Z","published":"2025-12-24T13:06:00.412Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50771.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3d92527a919edd1aa381bdd6c299dd75a8167396"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5a52380b8193cf8be6c4a6b94b86ef64ed80c0dc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/80a3e7ab477b3655615fc1627c88c248d4ad28d9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/98a5b1265a36e9d843a51ddd6c9fa02da50d2c57"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a74af9b937707b42c3fd041aae1ed4ce2f337307"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ceb1c8c9b8aa9199da46a0f29d2d5f08d9b44c15"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50771.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50771"},{"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":"d860d40327dde251d508a234fa00bd0d90fbb656"},{"fixed":"3d92527a919edd1aa381bdd6c299dd75a8167396"},{"fixed":"5a52380b8193cf8be6c4a6b94b86ef64ed80c0dc"},{"fixed":"98a5b1265a36e9d843a51ddd6c9fa02da50d2c57"},{"fixed":"a74af9b937707b42c3fd041aae1ed4ce2f337307"},{"fixed":"80a3e7ab477b3655615fc1627c88c248d4ad28d9"},{"fixed":"ceb1c8c9b8aa9199da46a0f29d2d5f08d9b44c15"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50771.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.17.0"},{"fixed":"5.4.229"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.163"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.86"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.0.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.1.0"},{"fixed":"6.1.2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50771.json"}}],"schema_version":"1.7.5"}