From patchwork Fri Mar 22 14:56:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Christian_G=C3=B6ttsche?= X-Patchwork-Id: 13600232 X-Patchwork-Delegate: plautrba@redhat.com Received: from server02.seltendoof.de (server02.seltendoof.de [168.119.48.163]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF9B3481A5 for ; Fri, 22 Mar 2024 14:56:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=168.119.48.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711119392; cv=none; b=SOL/P+ncqXvIXIJG600FlGp6PC1h7AmLIl5A3Nfy4yGiv+P6uMtBByn2teT9vbcbjoAPcEH7PPJ63QU0JT2pFhDMnfD7y3ZL/a+bQpBDHuaAfa2LXe5m6FfNkmRo8oEbbi/mCNN+A9OFOmToYWa/hsDF0A+hjg6zIyO8kmqwMm8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711119392; c=relaxed/simple; bh=gxQcX5XS05rm/d39mf8nu23DfHDZePJzMyU7BxqIti8=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=jqzRNkWjz40MG8sdnRsYWnIsEqC84YLsGmoq196Z4AqumVvZbKteapuLLiaQUs/py9RCyCrlp9CCu2m+zUTKXBzFgePeYW5BuKFd7zBR/kWsgnu2XpUMBBNPstKEolZs+4fOxCnqHPADlw5BZp68GVcyBAeuZ8MSczXKEvEfVaA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=googlemail.com; spf=fail smtp.mailfrom=googlemail.com; arc=none smtp.client-ip=168.119.48.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=googlemail.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=googlemail.com From: =?utf-8?q?Christian_G=C3=B6ttsche?= To: selinux@vger.kernel.org Subject: [PATCH v2] libselinux: avoid logs in get_ordered_context_list() without policy Date: Fri, 22 Mar 2024 15:56:21 +0100 Message-ID: <20240322145621.61520-1-cgzones@googlemail.com> Precedence: bulk X-Mailing-List: selinux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 If no policy has been loaded yet and thus the current context is still "kernel" avoid logging failures in get_ordered_context_list(), like: get_ordered_context_list: error in processing configuration file /etc/selinux/debian/contexts/users/root get_ordered_context_list: error in processing configuration file /etc/selinux/debian/contexts/default_contexts Move the context parsing from get_context_user() to its caller get_ordered_context_list(), so an invalid context is not treated as an get_context_user() failure and not logged. Signed-off-by: Christian Göttsche --- v2: - move the context parsing from get_context_user() to its caller - add Signed-off-by --- libselinux/src/get_context_list.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/libselinux/src/get_context_list.c b/libselinux/src/get_context_list.c index 7e23be05..0ad24654 100644 --- a/libselinux/src/get_context_list.c +++ b/libselinux/src/get_context_list.c @@ -130,7 +130,7 @@ static int is_in_reachable(char **reachable, const char *usercon_str) } static int get_context_user(FILE * fp, - const char * fromcon, + context_t fromcon, const char * user, char ***reachable, unsigned int *nreachable) @@ -146,7 +146,6 @@ static int get_context_user(FILE * fp, char **new_reachable = NULL; char *usercon_str; const char *usercon_str2; - context_t con; context_t usercon; int rc; @@ -155,14 +154,10 @@ static int get_context_user(FILE * fp, /* Extract the role and type of the fromcon for matching. User identity and MLS range can be variable. */ - con = context_new(fromcon); - if (!con) - return -1; - fromrole = context_role_get(con); - fromtype = context_type_get(con); - fromlevel = context_range_get(con); + fromrole = context_role_get(fromcon); + fromtype = context_type_get(fromcon); + fromlevel = context_range_get(fromcon); if (!fromrole || !fromtype) { - context_free(con); return -1; } @@ -296,7 +291,6 @@ static int get_context_user(FILE * fp, rc = 0; out: - context_free(con); free(line); return rc; } @@ -418,6 +412,7 @@ int get_ordered_context_list(const char *user, char *fname = NULL; size_t fname_len; const char *user_contexts_path = selinux_user_contexts_path(); + context_t con = NULL; if (!fromcon) { /* Get the current context and use it for the starting context */ @@ -427,6 +422,10 @@ int get_ordered_context_list(const char *user, fromcon = backup_fromcon; } + con = context_new(fromcon); + if (!con) + goto failsafe; + /* Determine the ordering to apply from the optional per-user config and from the global config. */ fname_len = strlen(user_contexts_path) + strlen(user) + 2; @@ -437,7 +436,7 @@ int get_ordered_context_list(const char *user, fp = fopen(fname, "re"); if (fp) { __fsetlocking(fp, FSETLOCKING_BYCALLER); - rc = get_context_user(fp, fromcon, user, &reachable, &nreachable); + rc = get_context_user(fp, con, user, &reachable, &nreachable); fclose(fp); if (rc < 0 && errno != ENOENT) { @@ -451,7 +450,7 @@ int get_ordered_context_list(const char *user, fp = fopen(selinux_default_context_path(), "re"); if (fp) { __fsetlocking(fp, FSETLOCKING_BYCALLER); - rc = get_context_user(fp, fromcon, user, &reachable, &nreachable); + rc = get_context_user(fp, con, user, &reachable, &nreachable); fclose(fp); if (rc < 0 && errno != ENOENT) { selinux_log(SELINUX_ERROR, @@ -472,6 +471,7 @@ int get_ordered_context_list(const char *user, else freeconary(reachable); + context_free(con); freecon(backup_fromcon); return rc;