git: 114c6d9bef76 - stable/13 - cap_net: correct capability name from addr2name to name2addr

The branch stable/13 has been updated by emaste:

URL: https://cgit.FreeBSD.org/src/commit/?id=114c6d9bef765a47ebcb8e65d1c935cbcbe51002

commit 114c6d9bef765a47ebcb8e65d1c935cbcbe51002
Author:     Mariusz Zaborski <oshogbo@FreeBSD.org>
AuthorDate: 2023-10-23 21:03:51 +0000
Commit:     Ed Maste <emaste@FreeBSD.org>
CommitDate: 2023-11-06 19:19:54 +0000

    cap_net: correct capability name from addr2name to name2addr
    
    Previously, while checking name2addr capabilities, we mistakenly used
    the addr2name set. This error could cause a process to inadvertently
    reset its limitations.
    
    Reported by:    Shawn Webb <shawn.webb@hardenedbsd.org>
    
    (cherry picked from commit afd74c400075d94e01dd3430844bb290834660ef)
    (cherry picked from commit 765757c6301fa41c0b59108347c600fbc9020c39)
---
 lib/libcasper/services/cap_net/cap_net.c        |  2 +-
 lib/libcasper/services/cap_net/tests/net_test.c | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/libcasper/services/cap_net/cap_net.c b/lib/libcasper/services/cap_net/cap_net.c
index 06fbc780bbce..c29bc36bf64c 100644
--- a/lib/libcasper/services/cap_net/cap_net.c
+++ b/lib/libcasper/services/cap_net/cap_net.c
@@ -1232,7 +1232,7 @@ verify_name2addr_newlimits(const nvlist_t *oldlimits,
 	oldfunclimits = NULL;
 	if (oldlimits != NULL) {
 		oldfunclimits = dnvlist_get_nvlist(oldlimits,
-		    LIMIT_NV_ADDR2NAME, NULL);
+		    LIMIT_NV_NAME2ADDR, NULL);
 	}
 
 	cookie = NULL;
diff --git a/lib/libcasper/services/cap_net/tests/net_test.c b/lib/libcasper/services/cap_net/tests/net_test.c
index 989a98f3ae22..86d771fc97d7 100644
--- a/lib/libcasper/services/cap_net/tests/net_test.c
+++ b/lib/libcasper/services/cap_net/tests/net_test.c
@@ -742,6 +742,18 @@ ATF_TC_BODY(capnet__limits_name2addr_hosts, tc)
 	limit = cap_net_limit_init(capnet, CAPNET_NAME2ADDR);
 	ATF_REQUIRE(cap_net_limit(limit) != 0);
 
+	/* Try to extend the limit. */
+	limit = cap_net_limit_init(capnet, CAPNET_NAME2ADDR);
+	ATF_REQUIRE(limit != NULL);
+	cap_net_limit_name2addr(limit, TEST_DOMAIN_1, NULL);
+	ATF_REQUIRE(cap_net_limit(limit) != 0);
+
+	limit = cap_net_limit_init(capnet, CAPNET_NAME2ADDR);
+	ATF_REQUIRE(limit != NULL);
+	cap_net_limit_name2addr(limit, TEST_DOMAIN_0, NULL);
+	cap_net_limit_name2addr(limit, TEST_DOMAIN_1, NULL);
+	ATF_REQUIRE(cap_net_limit(limit) != 0);
+
 	cap_close(capnet);
 }