[PATCH v4] getcwd: Set errno to ERANGE for size == 1 (CVE-2021-3999)

[Andreas Schwab]

On Jan 21 2022, Siddhesh Poyarekar via Libc-alpha wrote:

> +static int
> +recv_fd (const int sock)
> +{
> +  struct msghdr msg;
> +  union
> +    {
> +      struct cmsghdr hdr;
> +      char buf[CMSG_SPACE(sizeof(int))];
> +    } cmsgbuf;

Zero-init like in send_fd.

-- 
Andreas Schwab, schwab@linux-m68k.org
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