bpf: fix potential deadlock in bpf_prog_register

[mirror_ubuntu-eoan-kernel.git] / kernel / trace / bpf_trace.c

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 8b068adb9da1ce23538eeb3bdf3fc7fbd94f2f59..f1a86a0d881ddb877b4a800bd4f31c30c76fab8e 100644 (file)
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -1204,22 +1204,12 @@ static int __bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *
 
 int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog)
 {
-       int err;
-
-       mutex_lock(&bpf_event_mutex);
-       err = __bpf_probe_register(btp, prog);
-       mutex_unlock(&bpf_event_mutex);
-       return err;
+       return __bpf_probe_register(btp, prog);
 }
 
 int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog)
 {
-       int err;
-
-       mutex_lock(&bpf_event_mutex);
-       err = tracepoint_probe_unregister(btp->tp, (void *)btp->bpf_func, prog);
-       mutex_unlock(&bpf_event_mutex);
-       return err;
+       return tracepoint_probe_unregister(btp->tp, (void *)btp->bpf_func, prog);
 }
 
 int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id,