[PATCH] function_graph: Fix off-by-one error in buffer size

[Artem Sadovnikov]

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.

Signed-off-by: Artem Sadovnikov <a.sadovnikov@xxxxxxxxx>
---
 kernel/trace/trace_functions_graph.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index a8c1f56340680..d789d308ab1de 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -344,7 +344,7 @@ 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;
-- 
2.43.0