tsacct: replace strncpy() with strscpy()

Replace the deprecated[1] use of strncpy() in bacct_add_tsk().  Since this
is UAPI, include trailing padding in the copy.

Link: https://github.com/KSPP/linux/issues/90
Link: https://lkml.kernel.org/r/20240711171308.work.995-kees@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
Cc: "Dr. Thomas Orgis" <thomas.orgis@uni-hamburg.de>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Ismael Luceno <ismael@iodev.co.uk>
Cc: Peng Liu <liupeng256@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index 4252f0645b9e38f7fbc4436a472ca703384a31a4..16b283f9d8314122723b1c8d5dc95529e71beaa3 100644 (file)
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -76,7 +76,7 @@ void bacct_add_tsk(struct user_namespace *user_ns,
        stats->ac_minflt = tsk->min_flt;
        stats->ac_majflt = tsk->maj_flt;
 
-       strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
+       strscpy_pad(stats->ac_comm, tsk->comm);
 }