Date: Thu, 21 Jul 2022 14:38:55 GMT From: Mike Karels <karels@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: fb8ef16bab0d - main - IPv4: correct limit on loopback_prefix Message-ID: <202207211438.26LEctew070239@gitrepo.freebsd.org>
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The branch main has been updated by karels: URL: https://cgit.FreeBSD.org/src/commit/?id=fb8ef16bab0d23e185deed5a6b2e44e72ad53d43 commit fb8ef16bab0d23e185deed5a6b2e44e72ad53d43 Author: Mike Karels <karels@FreeBSD.org> AuthorDate: 2022-07-21 13:10:15 +0000 Commit: Mike Karels <karels@FreeBSD.org> CommitDate: 2022-07-21 14:38:17 +0000 IPv4: correct limit on loopback_prefix Commit efe58855f3ea allowed the net.inet.ip.loopback_prefix value to be 32. However, with a 32-bit mask, 127.0.0.1 is not included in the reserved loopback range, which should not be allowed. Change the max prefix length to 31. --- sys/netinet/in.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/netinet/in.c b/sys/netinet/in.c index c3880c4ba983..1c44623bdec1 100644 --- a/sys/netinet/in.c +++ b/sys/netinet/in.c @@ -297,7 +297,7 @@ sysctl_loopback_prefixlen(SYSCTL_HANDLER_ARGS) error = sysctl_handle_int(oidp, &preflen, 0, req); if (error || !req->newptr) return (error); - if (preflen < 8 || preflen > 32) + if (preflen < 8 || preflen > 31) return (EINVAL); V_in_loopback_mask = 0xffffffff << (32 - preflen); return (0);
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