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 14d74a7491b8cb1bfcb0205aa175d8b401e7ae70..66e1a527cf1acdde7b27d29354440a8060484f5c 100644 (file)
--- 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;