enable tun/tap/iptables

hc

2024-05-10 ee930fffee469d076998274a2ca55e13dc1efb67

 kernel/kernel/trace/trace_probe_tmpl.h
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@@ -54,7 +54,7 @@
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  * If dest is NULL, don't store result and return required dynamic data size.
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  */
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 static int
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-process_fetch_insn(struct fetch_insn *code, struct pt_regs *regs,
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+process_fetch_insn(struct fetch_insn *code, void *rec,
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 		   void *dest, void *base);
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 static nokprobe_inline int fetch_store_strlen(unsigned long addr);
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 static nokprobe_inline int
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@@ -143,6 +143,8 @@
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 array:
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 	/* the last stage: Loop on array */
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 	if (code->op == FETCH_OP_LP_ARRAY) {
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+		if (ret < 0)
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+			ret = 0;
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 		total += ret;
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 		if (++i < code->param) {
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 			code = s3;
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@@ -188,7 +190,7 @@
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 /* Store the value of each argument */
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 static nokprobe_inline void
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-store_trace_args(void *data, struct trace_probe *tp, struct pt_regs *regs,
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+store_trace_args(void *data, struct trace_probe *tp, void *rec,
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 		 int header_size, int maxlen)
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 {
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 	struct probe_arg *arg;
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@@ -203,12 +205,14 @@
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 		/* Point the dynamic data area if needed */
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 		if (unlikely(arg->dynamic))
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 			*dl = make_data_loc(maxlen, dyndata - base);
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-		ret = process_fetch_insn(arg->code, regs, dl, base);
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-		if (unlikely(ret < 0 && arg->dynamic)) {
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-			*dl = make_data_loc(0, dyndata - base);
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-		} else {
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-			dyndata += ret;
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-			maxlen -= ret;
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+		ret = process_fetch_insn(arg->code, rec, dl, base);
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+		if (arg->dynamic) {
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+			if (unlikely(ret < 0)) {
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+				*dl = make_data_loc(0, dyndata - base);
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+			} else {
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+				dyndata += ret;
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+				maxlen -= ret;
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+			}
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 		}
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 	}
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 }