修改：bpf_probe_read修正

https: //github.com/iovisor/bcc/issues/3175 Change-Id: I1e31fc6d62a32eebfb68f92ec18c362d14439e30
HorseLuke · Feb 7, 2023 · 5c8f3d2 · 5c8f3d2
1 parent e55bdca
commit 5c8f3d2
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
@@ -148,6 +148,11 @@ BPF_CALL_3(bpf_probe_read, void *, dst, u32, size, const void *, unsafe_ptr)
 
 	ret = probe_kernel_read(dst, unsafe_ptr, size);
 	if (unlikely(ret < 0))
+		goto out;
+
+	//https://github.com/iovisor/bcc/issues/3175
+    ret = probe_user_read(dst, unsafe_ptr, size);
+        if (unlikely(ret < 0))
 out:
 		memset(dst, 0, size);