trace-cmd: Don't crash on printk format errors

For some reason the trace-cmd split caused the printk format to
have lonely ":" on the line which caused the parsing to break.
Just warn instead of crashing.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/trace-util.c b/trace-util.c
index 6854977..4a97ff0 100644
--- a/trace-util.c
+++ b/trace-util.c
@@ -169,6 +169,10 @@ void parse_ftrace_printk(char *file, unsigned int size __unused)
         line = strtok_r(file, "\n", &next);
         while (line) {
                 addr_str = strtok_r(line, ":", &fmt);
+                if (!addr_str) {
+                        warning("printk format with empty entry");
+                        break;
+                }
                 addr = strtoull(addr_str, NULL, 16);
                 /* fmt still has a space, skip it */
                 printk = strdup(fmt+1);