From patchwork Mon Apr 7 09:54:21 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Brauner X-Patchwork-Id: 14040117 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5356023535D for ; Mon, 7 Apr 2025 09:54:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744019697; cv=none; b=f1P5xudqyOUeIH25cYnVkIP6INeyWpOsO9qwIEIms2Ax4oNf2Bsjqh9S/S8FFKzYB16TFFT7bjAJpMHlMGc22XFTzIVOZDVDc3UP4y8wqzoaFIsu2H/Rp3coLBjwex0R54Tj7WbvqOC1FqkrGDeFNhNqQqN9SawgO4Ky1OPK0t4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744019697; c=relaxed/simple; bh=98OBOQFblJwLUfpJ22v4FmjzjKsmScxuLc0VekWWN3k=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=izCJIhc0u9a5w+lLSeTiOu/Vx5JKOI2SOacf9eJBue5QEqSbh5x9PUiq8GT/OH1fjMZDb2sOhuFpD0TMXIDfKagDOV+ersdKcXe+ppsGIuzOyQwns+ufdvX2DamZQpukZWlr8uExeORO5YasJA7Jy1rstMt63T9cpOJT3gda3yk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Tp97n+kM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Tp97n+kM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 12A74C4CEE7; Mon, 7 Apr 2025 09:54:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744019696; bh=98OBOQFblJwLUfpJ22v4FmjzjKsmScxuLc0VekWWN3k=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=Tp97n+kMClf5r30DZ6LE6CiA4G76xWxVJekLk7Hh2/flJXxKdQ+2FEjWCd3o4GsOd AXcd6lZ3nuyg7PMMuoBxCJOhQdBTD6E+4BQFAUeFIZ3sf2mtSjcucPxP1QFlHNkAWG oIZaOfvBUzGSwwg4PTwKHuhT+2tPMzIEZVy+CG4A2URENCh/8ut3GVP0cjtLOtiIJO bjyPfW47SshoZuw9ocnaJjlybUORaSDuLWWleRUxJ7bgtURzMbDdQKRDkegdOgOWiN RDtGd+hhp536dNhc1/Uw05djZMyMeJOU89r28tc4o1P4/OtPOtZWkpBBgZ0rSrqT49 ps2REkPJ93kGA== From: Christian Brauner Date: Mon, 07 Apr 2025 11:54:21 +0200 Subject: [PATCH 7/9] selftests/filesystems: add second test for anonymous inodes Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250407-work-anon_inode-v1-7-53a44c20d44e@kernel.org> References: <20250407-work-anon_inode-v1-0-53a44c20d44e@kernel.org> In-Reply-To: <20250407-work-anon_inode-v1-0-53a44c20d44e@kernel.org> To: linux-fsdevel@vger.kernel.org Cc: Christoph Hellwig , Mateusz Guzik , Penglei Jiang , Al Viro , Jan Kara , Jeff Layton , Josef Bacik , syzbot+5d8e79d323a13aa0b248@syzkaller.appspotmail.com, Christian Brauner X-Mailer: b4 0.15-dev-c25d1 X-Developer-Signature: v=1; a=openpgp-sha256; l=885; i=brauner@kernel.org; h=from:subject:message-id; bh=98OBOQFblJwLUfpJ22v4FmjzjKsmScxuLc0VekWWN3k=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMaR/XnDdWW39qwd67CUfGl5KmBtd8frxIuDPG0nVNs79a +UuWk183FHKwiDGxSArpsji0G4SLrecp2KzUaYGzBxWJpAhDFycAjCRlemMDC932Fdf25Thyy0U 7R2x1V9SPzhk9vLNL14v3/q76fq00/MYGXbvO5irZ1dl0uN4d+G84omb+KW/OfjfcOhj3XZqnYm BAzcA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Test that anonymous inodes cannot be chmod()ed. Signed-off-by: Christian Brauner Reviewed-by: Jan Kara --- tools/testing/selftests/filesystems/anon_inode_test.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/tools/testing/selftests/filesystems/anon_inode_test.c b/tools/testing/selftests/filesystems/anon_inode_test.c index f2cae8f1ccae..7c4d0a225363 100644 --- a/tools/testing/selftests/filesystems/anon_inode_test.c +++ b/tools/testing/selftests/filesystems/anon_inode_test.c @@ -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