fgraph: Make pid_str size match the comment
The comment above buffer mentions sign, 10 bytes width for number and null
terminator, but buffer itself isn't large enough to hold that much data.
This is a cosmetic change, since PID cannot be negative, other than -1.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Link: https://lore.kernel.org/20250617152110.2530-1-a.sadovnikov@ispras.ru
Signed-off-by: Artem Sadovnikov <a.sadovnikov@ispras.ru>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 14d74a7..66e1a52 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -513,7 +513,7 @@ static void print_graph_proc(struct trace_seq *s, pid_t pid)
{
char comm[TASK_COMM_LEN];
/* sign + log10(MAX_INT) + '\0' */
- char pid_str[11];
+ char pid_str[12];
int spaces = 0;
int len;
int i;
