Date: Wed, 17 Oct 2018 16:17:57 +0000 (UTC) From: Jamie Gritton <jamie@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r339410 - stable/10/sys/kern Message-ID: <201810171617.w9HGHvqJ031721@repo.freebsd.org>
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Author: jamie Date: Wed Oct 17 16:17:56 2018 New Revision: 339410 URL: https://svnweb.freebsd.org/changeset/base/339410 Log: MFC r339211: Fix the test prohibiting jails from sharing IP addresses. It's not supposed to be legal for two jails to contain the same IP address, unless both jails contain only that one address. This is the behavior documented in jail(8), and is there to prevent confusion when multiple jails are listening on IADDR_ANY. VIMAGE jails (now the default for GENERIC kernels) test this correctly, but non-VIMAGE jails have been performing an incomplete test when nested jails are used. Modified: stable/10/sys/kern/kern_jail.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/kern/kern_jail.c ============================================================================== --- stable/10/sys/kern/kern_jail.c Wed Oct 17 16:11:43 2018 (r339409) +++ stable/10/sys/kern/kern_jail.c Wed Oct 17 16:17:56 2018 (r339410) @@ -1478,11 +1478,12 @@ kern_jail_set(struct thread *td, struct uio *optuio, i * there is a duplicate on a jail with more than one * IP stop checking and return error. */ - tppr = ppr; #ifdef VIMAGE - for (; tppr != &prison0; tppr = tppr->pr_parent) + for (tppr = ppr; tppr != &prison0; tppr = tppr->pr_parent) if (tppr->pr_flags & PR_VNET) break; +#else + tppr = &prison0; #endif FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { if (tpr == pr || @@ -1544,11 +1545,12 @@ kern_jail_set(struct thread *td, struct uio *optuio, i } } /* Check for conflicting IP addresses. */ - tppr = ppr; #ifdef VIMAGE - for (; tppr != &prison0; tppr = tppr->pr_parent) + for (tppr = ppr; tppr != &prison0; tppr = tppr->pr_parent) if (tppr->pr_flags & PR_VNET) break; +#else + tppr = &prison0; #endif FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { if (tpr == pr ||
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