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test-fs-util: test chase_symlinks with user-owned dirs

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This verifies the fix for the issue described in:
https://github.com/systemd/systemd/pull/11820
This commit is contained in:
David Michael
2019-02-26 13:31:28 -05:00
parent 8595c4588c
commit 2a2fe6ed64
1 changed files with 24 additions and 0 deletions
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24
src/test/test-fs-util.c
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@@ -154,6 +154,30 @@ static void test_chase_symlinks(void) {
assert_se(path_equal(result, q));
result = mfree(result);
/* Paths underneath the "root" with different UIDs while using CHASE_SAFE */
if (geteuid() == 0) {
p = strjoina(temp, "/user");
assert_se(mkdir(p, 0755) >= 0);
assert_se(chown(p, UID_NOBODY, GID_NOBODY) >= 0);
q = strjoina(temp, "/user/root");
assert_se(mkdir(q, 0755) >= 0);
p = strjoina(q, "/link");
assert_se(symlink("/", p) >= 0);
/* Fail when user-owned directories contain root-owned subdirectories. */
r = chase_symlinks(p, temp, CHASE_SAFE, &result);
assert_se(r == -ENOLINK);
result = mfree(result);
/* Allow this when the user-owned directories are all in the "root". */
r = chase_symlinks(p, q, CHASE_SAFE, &result);
assert_se(r > 0);
result = mfree(result);
}
/* Paths using . */
r = chase_symlinks("/etc/./.././", NULL, 0, &result);