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selftests/filesystems: add chmod() test for anonymous inodes

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Test that anonymous inodes cannot be chmod()ed.

Link: https://lore.kernel.org/20250407-work-anon_inode-v1-7-53a44c20d44e@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2025-04-07 11:54:21 +02:00
parent c784159750
commit fcf31ec7ca
1 changed files with 13 additions and 0 deletions
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13
tools/testing/selftests/filesystems/anon_inode_test.c
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@@ -22,5 +22,18 @@ TEST(anon_inode_no_chown)
EXPECT_EQ(close(fd_context), 0);
}
TEST(anon_inode_no_chmod)
{
int fd_context;
fd_context = sys_fsopen("tmpfs", 0);
ASSERT_GE(fd_context, 0);
ASSERT_LT(fchmod(fd_context, 0777), 0);
ASSERT_EQ(errno, EOPNOTSUPP);
EXPECT_EQ(close(fd_context), 0);
}
TEST_HARNESS_MAIN