CVE-2025-37884
bpf: Fix deadlock between rcu_tasks_trace and event_mutex.
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bpf: Fix deadlock between rcu_tasks_trace and event_mutex.
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix deadlock between rcu_tasks_trace and event_mutex. Fix the following deadlock: CPU A _free_event() perf_kprobe_destroy() mutex_lock(&event_mutex) perf_trace_event_unreg() synchronize_rcu_tasks_trace() There are several paths where _free_event() grabs event_mutex and calls sync_rcu_tasks_trace. Above is one such case. CPU B bpf_prog_test_run_syscall() rcu_read_lock_trace() bpf_prog_run_pin_on_cpu() bpf_prog_load() bpf_tracing_func_proto() trace_set_clr_event() mutex_lock(&event_mutex) Delegate trace_set_clr_event() to workqueue to avoid such lock dependency.
Reserved 2025-04-16 | Published 2025-05-09 | Updated 2025-05-09 | Assigner Linuxgit.kernel.org/...c/255cbc9db7067a83713fd2f4b31034ddd266549a
git.kernel.org/...c/b5a528a34e1f613565115a7a6016862ccbfcb9ac
git.kernel.org/...c/c5c833f6375f8ecf9254dd27946c927c7d645421
git.kernel.org/...c/45286680b385f2592db3003554872388dee66d68
git.kernel.org/...c/4580f4e0ebdf8dc8d506ae926b88510395a0c1d1
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