target/riscv: Prevent dump_field() reading uninitialized memory

Change-Id: I9ef8f2c2e9a824aa6595e8f20682c968ae5aed72 Signed-off-by: Tim Newsome <tim@sifive.com>
riscv-collab · Oct 30, 2023 · e474d1d · e474d1d
1 parent 89260a5
commit e474d1d
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/src/target/riscv/riscv-013.c b/src/target/riscv/riscv-013.c
@@ -354,15 +354,20 @@ static unsigned int decode_dm(char *text, unsigned int address, unsigned int dat
 					context, data);
 		}
 	}
+	if (text)
+		text[0] = '\0';
 	return 0;
 }
 
 static unsigned int decode_dmi(struct target *target, char *text, unsigned int address,
 		unsigned int data)
 {
 	dm013_info_t *dm = get_dm(target);
-	if (!dm)
+	if (!dm) {
+		if (text)
+			text[0] = '\0';
 		return 0;
+	}
 	return decode_dm(text, address - dm->base, data);
 }