From: Alexei Starovoitov <a...@kernel.org> Date: Sat, 28 Apr 2018 19:56:37 -0700
> tracepoints to bpf core were added as a way to provide introspection > to bpf programs and maps, but after some time it became clear that > this approach is inadequate, so prog_id, map_id and corresponding > get_next_id, get_fd_by_id, get_info_by_fd, prog_query APIs were > introduced and fully adopted by bpftool and other applications. > The tracepoints in bpf core started to rot and causing syzbot warnings: > WARNING: CPU: 0 PID: 3008 at kernel/trace/trace_event_perf.c:274 > Kernel panic - not syncing: panic_on_warn set ... > perf_trace_bpf_map_keyval+0x260/0xbd0 include/trace/events/bpf.h:228 > trace_bpf_map_update_elem include/trace/events/bpf.h:274 [inline] > map_update_elem kernel/bpf/syscall.c:597 [inline] > SYSC_bpf kernel/bpf/syscall.c:1478 [inline] > Hence this patch deletes tracepoints in bpf core. > > Reported-by: Eric Biggers <ebigge...@gmail.com> > Reported-by: syzbot > <bot+a9dbb3c3e64b62536a4bc5ee7bbd4ca627566...@syzkaller.appspotmail.com> > Signed-off-by: Alexei Starovoitov <a...@kernel.org> Acked-by: David S. Miller <da...@davemloft.net>
