Replace sprintf() with snprintf() when formatting symlink target name
to prevent potential buffer overflow. The link_to buffer is only 10
bytes, and using snprintf() ensures proper bounds checking if the
topology nesting limit value is unexpectedly large.

Signed-off-by: Josephine Pfeiffer <hi@josie.lol>
---
 arch/s390/kernel/sysinfo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/kernel/sysinfo.c b/arch/s390/kernel/sysinfo.c
index 1ea84e942bd4..33ca3e47a0e6 100644
--- a/arch/s390/kernel/sysinfo.c
+++ b/arch/s390/kernel/sysinfo.c
@@ -526,7 +526,7 @@ static __init int stsi_init_debugfs(void)
 	if (IS_ENABLED(CONFIG_SCHED_TOPOLOGY) && cpu_has_topology()) {
 		char link_to[10];
 
-		sprintf(link_to, "15_1_%d", topology_mnest_limit());
+		snprintf(link_to, sizeof(link_to), "15_1_%d", topology_mnest_limit());
 		debugfs_create_symlink("topology", stsi_root, link_to);
 	}
 	return 0;
-- 
2.51.0