From: Andreas Schwab <schwab@linux-m68k.org>
To: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: libc-alpha@sourceware.org, bug-hurd@gnu.org, commit-hurd@gnu.org
Subject: Re: [hurd,commited] socket: Fix tst-cmsghdr-skeleton.c use of cmsg_len
Date: Mon, 01 May 2023 15:38:45 +0200 [thread overview]
Message-ID: <874jow41ei.fsf@igel.home> (raw)
In-Reply-To: <20230501130607.3846669-1-samuel.thibault@ens-lyon.org> (Samuel Thibault's message of "Mon, 1 May 2023 15:06:07 +0200")
On Mai 01 2023, Samuel Thibault wrote:
> cmsg_len is supposed to be socklen_t according to standards, but it was made
> size_t on Linux, see BZ 16919. For ports that have it socklen_t, SIZE_MAX is
> too large. We can however explicitly cast it to the type of cmsg_len so it
> will fit according to that type.
> ---
> socket/tst-cmsghdr-skeleton.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/socket/tst-cmsghdr-skeleton.c b/socket/tst-cmsghdr-skeleton.c
> index 296a0a8581..9516139f87 100644
> --- a/socket/tst-cmsghdr-skeleton.c
> +++ b/socket/tst-cmsghdr-skeleton.c
> @@ -49,7 +49,7 @@ RUN_TEST_FUNCNAME (CMSG_NXTHDR_IMPL) (void)
> /* The first header length is so big, using it would cause an overflow. */
> cmsg = CMSG_FIRSTHDR (&m);
> TEST_VERIFY_EXIT ((char *) cmsg == cmsgbuf);
> - cmsg->cmsg_len = SIZE_MAX;
> + cmsg->cmsg_len = (__typeof (cmsg->cmsg_len)) SIZE_MAX;
What does that fix?
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
next prev parent reply other threads:[~2023-05-01 13:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-01 13:06 Samuel Thibault
2023-05-01 13:38 ` Andreas Schwab [this message]
2023-05-01 13:43 ` [hurd, commited] " Samuel Thibault
2023-05-01 14:03 ` Andreas Schwab
2023-05-01 16:34 ` Samuel Thibault
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