tree 9daa3a8015f051b4fc36020d310b266f652627e5
parent f7355a6c049711ecfbeed573e43d48bee7acb83a
author Chang-Hsien Tsai <luke.tw@gmail.com> 1558256744 +0000
committer Daniel Borkmann <daniel@iogearbox.net> 1558449408 +0200

samples, bpf: fix to change the buffer size for read()

If the trace for read is larger than 4096, the return
value sz will be 4096. This results in off-by-one error
on buf:

    static char buf[4096];
    ssize_t sz;

    sz = read(trace_fd, buf, sizeof(buf));
    if (sz > 0) {
        buf[sz] = 0;
        puts(buf);
    }

Signed-off-by: Chang-Hsien Tsai <luke.tw@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>