Hi, On Wed, Aug 28, 2024 at 11:03:17AM GMT, Yafang Shao wrote: > Let's explicitly ensure the destination string is NUL-terminated. This way, > it won't be affected by changes to the source string. > > Signed-off-by: Yafang Shao <laoar.shao@xxxxxxxxx> > Reviewed-by: Quentin Monnet <qmo@xxxxxxxxxx> > --- > tools/bpf/bpftool/pids.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/tools/bpf/bpftool/pids.c b/tools/bpf/bpftool/pids.c > index 9b898571b49e..23f488cf1740 100644 > --- a/tools/bpf/bpftool/pids.c > +++ b/tools/bpf/bpftool/pids.c > @@ -54,6 +54,7 @@ static void add_ref(struct hashmap *map, struct pid_iter_entry *e) > ref = &refs->refs[refs->ref_cnt]; > ref->pid = e->pid; > memcpy(ref->comm, e->comm, sizeof(ref->comm)); > + ref->comm[sizeof(ref->comm) - 1] = '\0'; ... > refs->ref_cnt++; > > return; > @@ -77,6 +78,7 @@ static void add_ref(struct hashmap *map, struct pid_iter_entry *e) > ref = &refs->refs[0]; > ref->pid = e->pid; > memcpy(ref->comm, e->comm, sizeof(ref->comm)); > + ref->comm[sizeof(ref->comm) - 1] = '\0'; Excuse my ignorance, do we not have a strscpy() equivalent usable in bpf code? > refs->ref_cnt = 1; > refs->has_bpf_cookie = e->has_bpf_cookie; > refs->bpf_cookie = e->bpf_cookie; > -- > 2.43.5 > Thanks Justin
