[PATCH v4] tracing: Replace deprecated strncpy() with strscpy() for stack_trace_filter_buf

Devaansh Kumar
2025-04-18T22:15:13Z

strncpy() is deprecated for NUL-terminated destination buffers and must
be replaced by strscpy().

See issue: https://github.com/KSPP/linux/issues/90

Signed-off-by: Devaansh Kumar <devaanshk840@gmail.com>
---
kernel/trace/trace_stack.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index 14c6f272c4d8..0f2253f3bc8c 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -542,7 +542,7 @@ static __init int enable_stacktrace(char *str)
int len;

if ((len = str_has_prefix(str, "_filter=")))
- strncpy(stack_trace_filter_buf, str + len, COMMAND_LINE_SIZE);
+ strscpy(stack_trace_filter_buf, str + len, sizeof(stack_trace_filter_buf));

stack_tracer_enabled = 1;
return 1;
--
2.49.0