{"id":"CVE-2025-39745","summary":"rcutorture: Fix rcutorture_one_extend_check() splat in RT kernels","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nrcutorture: Fix rcutorture_one_extend_check() splat in RT kernels\n\nFor built with CONFIG_PREEMPT_RT=y kernels, running rcutorture\ntests resulted in the following splat:\n\n[   68.797425] rcutorture_one_extend_check during change: Current 0x1  To add 0x1  To remove 0x0  preempt_count() 0x0\n[   68.797533] WARNING: CPU: 2 PID: 512 at kernel/rcu/rcutorture.c:1993 rcutorture_one_extend_check+0x419/0x560 [rcutorture]\n[   68.797601] Call Trace:\n[   68.797602]  \u003cTASK\u003e\n[   68.797619]  ? lockdep_softirqs_off+0xa5/0x160\n[   68.797631]  rcutorture_one_extend+0x18e/0xcc0 [rcutorture 2466dbd2ff34dbaa36049cb323a80c3306ac997c]\n[   68.797646]  ? local_clock+0x19/0x40\n[   68.797659]  rcu_torture_one_read+0xf0/0x280 [rcutorture 2466dbd2ff34dbaa36049cb323a80c3306ac997c]\n[   68.797678]  ? __pfx_rcu_torture_one_read+0x10/0x10 [rcutorture 2466dbd2ff34dbaa36049cb323a80c3306ac997c]\n[   68.797804]  ? __pfx_rcu_torture_timer+0x10/0x10 [rcutorture 2466dbd2ff34dbaa36049cb323a80c3306ac997c]\n[   68.797815] rcu-torture: rcu_torture_reader task started\n[   68.797824] rcu-torture: Creating rcu_torture_reader task\n[   68.797824]  rcu_torture_reader+0x238/0x580 [rcutorture 2466dbd2ff34dbaa36049cb323a80c3306ac997c]\n[   68.797836]  ? kvm_sched_clock_read+0x15/0x30\n\nDisable BH does not change the SOFTIRQ corresponding bits in\npreempt_count() for RT kernels, this commit therefore use\nsoftirq_count() to check the if BH is disabled.","modified":"2026-05-28T03:53:42.970906204Z","published":"2025-09-11T16:52:18.423Z","related":["CGA-g7xg-7683-fh8w"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39745.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/69c5ae0f441c2d72e8f48dc1e08464c172360c4c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8d71351d88e478d3c4e945e3218e97ec677fd807"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a85550267247cdf5e7499be00ea8e388ab014e50"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39745.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39745"},{"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":"ec9d6356bfda69abe5f4767dd56c964127913233"},{"fixed":"a85550267247cdf5e7499be00ea8e388ab014e50"},{"fixed":"69c5ae0f441c2d72e8f48dc1e08464c172360c4c"},{"fixed":"8d71351d88e478d3c4e945e3218e97ec677fd807"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39745.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.14.0"},{"fixed":"6.15.11"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.16.0"},{"fixed":"6.16.2"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39745.json"}}],"schema_version":"1.7.5"}