The branch main has been updated by des:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=cf76bfbb235116702ea1689bf984f200a72d2790

commit cf76bfbb235116702ea1689bf984f200a72d2790
Author:     Dag-Erling Smørgrav <[email protected]>
AuthorDate: 2025-09-29 12:36:24 +0000
Commit:     Dag-Erling Smørgrav <[email protected]>
CommitDate: 2025-09-29 12:39:49 +0000

    tzcode: Test escape from TZDIR
    
    Test a value of TZ that temporarily escapes from TZDIR (which is not
    permitted when setugid) then reenters it.
    
    MFC after:      3 days
---
 lib/libc/tests/stdtime/detect_tz_changes_test.c | 39 ++++++++++++++++---------
 1 file changed, 26 insertions(+), 13 deletions(-)

diff --git a/lib/libc/tests/stdtime/detect_tz_changes_test.c 
b/lib/libc/tests/stdtime/detect_tz_changes_test.c
index fe6b04357331..06c31c9fbc3d 100644
--- a/lib/libc/tests/stdtime/detect_tz_changes_test.c
+++ b/lib/libc/tests/stdtime/detect_tz_changes_test.c
@@ -24,10 +24,12 @@
 
 #include <atf-c.h>
 
-static const struct tzcase {
+struct tzcase {
        const char *tzfn;
        const char *expect;
-} tzcases[] = {
+};
+
+static const struct tzcase tzcases[] = {
        /*
         * A handful of time zones and the expected result of
         * strftime("%z (%Z)", tm) when that time zone is active
@@ -43,7 +45,8 @@ static const struct tzcase {
        { "UTC",                "+0000 (UTC)"   },
        { 0 },
 };
-
+static const struct tzcase utc = { "UTC", "+0000 (UTC)" };
+static const struct tzcase invalid = { "invalid", "+0000 (-00)" };
 static const time_t then = 1751328000; /* 2025-07-01 00:00:00 UTC */
 
 static bool debugging;
@@ -139,7 +142,7 @@ ATF_TC_BODY(tz_invalid_file, tc)
        ATF_REQUIRE_EQ(0, chdir("/"));
        /* check timezone */
        unsetenv("TZ");
-       test_tz("+0000 (-00)");
+       test_tz(invalid.expect);
 }
 
 ATF_TC(thin_jail);
@@ -366,12 +369,8 @@ test_tz_env(const char *tzval, const char *expect)
        test_tz(expect);
 }
 
-ATF_TC(tz_env);
-ATF_TC_HEAD(tz_env, tc)
-{
-       atf_tc_set_md_var(tc, "descr", "Test TZ environment variable");
-}
-ATF_TC_BODY(tz_env, tc)
+static void
+tz_env_common(void)
 {
        char path[MAXPATHLEN];
        const struct tzcase *tzcase = tzcases;
@@ -394,6 +393,18 @@ ATF_TC_BODY(tz_env, tc)
        }
 }
 
+ATF_TC(tz_env);
+ATF_TC_HEAD(tz_env, tc)
+{
+       atf_tc_set_md_var(tc, "descr", "Test TZ environment variable");
+}
+ATF_TC_BODY(tz_env, tc)
+{
+       tz_env_common();
+       /* escape from TZDIR is permitted when not setugid */
+       test_tz_env("../zoneinfo/UTC", utc.expect);
+}
+
 
 ATF_TC(tz_invalid_env);
 ATF_TC_HEAD(tz_invalid_env, tc)
@@ -403,8 +414,8 @@ ATF_TC_HEAD(tz_invalid_env, tc)
 }
 ATF_TC_BODY(tz_invalid_env, tc)
 {
-       test_tz_env("invalid", "+0000 (-00)");
-       test_tz_env(":invalid", "+0000 (-00)");
+       test_tz_env("invalid", invalid.expect);
+       test_tz_env(":invalid", invalid.expect);
 }
 
 ATF_TC(setugid);
@@ -443,7 +454,9 @@ ATF_TC_BODY(tz_env_setugid, tc)
 {
        ATF_REQUIRE_EQ(0, seteuid(UID_NOBODY));
        ATF_REQUIRE(issetugid());
-       ATF_TC_BODY_NAME(tz_env)(tc);
+       tz_env_common();
+       /* escape from TZDIR is not permitted when setugid */
+       test_tz_env("../zoneinfo/UTC", invalid.expect);
 }
 
 ATF_TP_ADD_TCS(tp)

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