On Thu, Sep 10, 2015 at 06:21:00PM -0600, Tycho Andersen wrote:
> +static int bpf_prog_dump(union bpf_attr *attr, union bpf_attr __user *uattr)
> +{
> + int ufd = attr->prog_fd;
> + struct fd f = fdget(ufd);
> + struct bpf_prog *prog;
> + int ret = -EINVAL;
> +
> + prog = get_prog(f);
> + if (IS_ERR(prog))
> + return PTR_ERR(prog);
> +
> + /* For now, let's refuse to dump anything that isn't a seccomp program.
> + * Other program types have support for maps, which our current dump
> + * code doesn't support.
> + */
> + if (prog->type != BPF_PROG_TYPE_SECCOMP)
> + goto out;
> +
> + ret = -EFAULT;
> + if (put_user(prog->len, &uattr->dump_insn_cnt))
> + goto out;
> +
> + if (put_user((u8) prog->gpl_compatible, &uattr->gpl_compatible))
> + goto out;
> +
> + if (attr->dump_insns) {
> + u32 len = prog->len * sizeof(struct bpf_insn);
> +
> + if (copy_to_user(u64_to_ptr(attr->dump_insns),
> + prog->insns, len) != 0)
> + goto out;
> + }
> +
> + ret = 0;
> +out:
> + return ret;
fdput() is missing in all error paths.
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