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-rw-r--r--kernel/trace/trace_events.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 36a957c996c7..b49c107f82ac 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -1760,6 +1760,8 @@ static void update_event_printk(struct ftrace_event_call *call,
ptr++;
/* Check for alpha chars like ULL */
} while (isalnum(*ptr));
+ if (!*ptr)
+ break;
/*
* A number must have some kind of delimiter after
* it, and we can ignore that too.
@@ -1786,12 +1788,16 @@ static void update_event_printk(struct ftrace_event_call *call,
do {
ptr++;
} while (isalnum(*ptr) || *ptr == '_');
+ if (!*ptr)
+ break;
/*
* If what comes after this variable is a '.' or
* '->' then we can continue to ignore that string.
*/
if (*ptr == '.' || (ptr[0] == '-' && ptr[1] == '>')) {
ptr += *ptr == '.' ? 1 : 2;
+ if (!*ptr)
+ break;
goto skip_more;
}
/*