Date: Fri, 29 May 2026 16:01:35 +0000 From: Olivier Certner <olce@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: cf942ac9e967 - main - MAC/do: find_conf(): Turn an MPASS() into a KASSERT() Message-ID: <6a19b85f.346b4.2d2a568@gitrepo.freebsd.org>
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The branch main has been updated by olce: URL: https://cgit.FreeBSD.org/src/commit/?id=cf942ac9e967055286a7076bf76e9a62e1d22d8f commit cf942ac9e967055286a7076bf76e9a62e1d22d8f Author: Olivier Certner <olce@FreeBSD.org> AuthorDate: 2026-04-27 12:16:46 +0000 Commit: Olivier Certner <olce@FreeBSD.org> CommitDate: 2026-05-29 15:21:55 +0000 MAC/do: find_conf(): Turn an MPASS() into a KASSERT() Turn the pre-existing comment into an assertion message, with an update following the introduction of the "executable paths" feature. Explain in a comment why this situation cannot happen. Without INVARIANTS, such a situation would cause an immediate panic() (NULL is dereferenced in the next iteration of the loop), so leave the check under INVARIANTS only. Reviewed by: bapt MFC after: 1 month Sponsored by: The FreeBSD Foundation Pull Request: https://ron-dev.freebsd.org/FreeBSD/src/pulls/38 --- sys/security/mac_do/mac_do.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/sys/security/mac_do/mac_do.c b/sys/security/mac_do/mac_do.c index ab6c21b38063..3d0ce2b49baa 100644 --- a/sys/security/mac_do/mac_do.c +++ b/sys/security/mac_do/mac_do.c @@ -1184,7 +1184,15 @@ find_conf(struct prison *const pr, struct prison **const aprp) prison_unlock(cpr); ppr = cpr->pr_parent; - MPASS(ppr != NULL); /* prison0 always has rules. */ + /* + * 'prison0' normally always have a mac_do(4) configuration + * because we installed one on module load/activation and + * nothing can destroy it as 'prison0' is not a regular jail and + * the 'mac.do' parameter cannot be set to 'inherit' on it, + * which is the only way to clear an existing configuration. + */ + KASSERT(ppr != NULL, + ("MAC/do: 'prison0' must always have a configuration.")); cpr = ppr; }home | help
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