The bprintk format structure may change in the near future. Update the
reading of the structure to comply with the change.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

Index: crash-5.1.3/extensions/trace.c
===================================================================
--- crash-5.1.3.orig/extensions/trace.c
+++ crash-5.1.3/extensions/trace.c
@@ -3383,6 +3383,7 @@ static int save_ftrace_printk(int fd)
 	long bprintk_fmt_s, bprintk_fmt_e;
 	long *address;
 	size_t i, count;
+	int addr_is_array = 0;
 
 	s = symbol_search("__start___trace_bprintk_fmt");
 	e = symbol_search("__stop___trace_bprintk_fmt");
@@ -3422,6 +3423,16 @@ static int save_ftrace_printk(int fd)
 	if (!b)
 		goto out;
 
+	switch (MEMBER_TYPE("trace_bprintk_fmt", "fmt")) {
+	case TYPE_CODE_ARRAY:
+		addr_is_array = 1;
+		break;
+	case TYPE_CODE_PTR:
+	default:
+		/* default not array */
+		break;
+	}
+
 	mod_fmt = (struct kernel_list_head *)GETBUF(SIZE(list_head));
 	if (!readmem(b->value, KVADDR, mod_fmt,
 		     SIZE(list_head), "trace_bprintk_fmt_list contents",
@@ -3432,6 +3443,12 @@ static int save_ftrace_printk(int fd)
 		unsigned long addr;
 
 		addr = (unsigned long)mod_fmt->next + SIZE(list_head);
+		if (!addr_is_array) {
+			if (!readmem(addr, KVADDR, &addr, sizeof(addr),
+				     "trace_bprintk_fmt_list fmt field",
+				     RETURN_ON_ERROR))
+				goto out_free;
+		}
 
 		if (!readmem((unsigned long)mod_fmt->next, KVADDR, mod_fmt,
 			     SIZE(list_head), "trace_bprintk_fmt_list contents",