{"affected":[],"cveId":"CVE-2022-50771","cwes":[],"description":"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<TASK>\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</TASK>\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().","epss":null,"exploits":[],"kev":null,"metrics":[],"modifiedAt":1794312600177,"publishedAt":1766582163917,"references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/3d92527a919edd1aa381bdd6c299dd75a8167396"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/5a52380b8193cf8be6c4a6b94b86ef64ed80c0dc"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/80a3e7ab477b3655615fc1627c88c248d4ad28d9"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/98a5b1265a36e9d843a51ddd6c9fa02da50d2c57"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/a74af9b937707b42c3fd041aae1ed4ce2f337307"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/ceb1c8c9b8aa9199da46a0f29d2d5f08d9b44c15"}],"remediation":[],"revision":"f1b3da908d4aaadef145d0f09495bb73b8ee0ea1090800716f4d3aaefd70759e","sources":[{"modifiedAt":1794312600177,"name":"NVD","retrievedAt":1794313083092,"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50771"}],"ssvc":null,"status":"published","title":"CVE-2022-50771","updatedAt":1794313083092}