From patchwork Mon Apr 7 09:54:23 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Brauner X-Patchwork-Id: 14040119 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 A93A9230BF4 for ; Mon, 7 Apr 2025 09:55:03 +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=1744019703; cv=none; b=AFUGd2Eb5drwtMpO0YPF21Tp6Jrq4LHMpLe8HEp4eYjGmgSnlj+vuqpBdfLuGIwX392sGdCPhmE+X/NawlNLDnV4rR6M1fOnkI9+KtfXET20ZwOK8ziM67lVvURTRXlRdrtju26EwxMQhGJX8ozEs4x4NAX/mAhQidaLoJu1Ksw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744019703; c=relaxed/simple; bh=IPngv6k4HTtp0L0AG/j88z5uovfA3r+o6pDR1kDrBHI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=gSWCJEcNeMPAuYDuZL2U3m871V7/81ztniQspwivhtgDjCY/f9MUtI55UmbT8IcuIiROag6jC7cUbryzf5j8AMUgCXgVNkYDDPL0skmeHEuufT/DsdiPdPeLXUhbGLXdgoMKwC5hpLtpLpiQSxbsk7KjSSssdqc77xr68q6W19k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=luWk8Dx5; 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="luWk8Dx5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9B9BEC4CEE7; Mon, 7 Apr 2025 09:55:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744019703; bh=IPngv6k4HTtp0L0AG/j88z5uovfA3r+o6pDR1kDrBHI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=luWk8Dx5v3NFNJIrB3nVvtAhqD4XvHLOEoOj6K+tCqvKNAD99D4AQudzSrz3SlzW5 t+HfScEKWJNAEcKyNXGiklzL5mRpmonTBaO4GhTya4VC5s/9ETTS7hcATgorA+Bs+k mFoJqiKByC3B6sWeF3alIeN00WWG9jcrZxEocOP6+8l/0dylsqi5Nc5CqfpDs7Ul8P wa960HBsgaUHXKmjv4CHKaIhjmuz/4OlO1FK2XM12idxNpnbI9xX/nPTHlOdkt7H0p ycX8PesH5jUOZL1zSqJdnC8Dl+Omxe2XLaFd70ME4KDKo3Py/Z2Su3maimTY2t/FqB /Kk9Z62w3bPZQ== From: Christian Brauner Date: Mon, 07 Apr 2025 11:54:23 +0200 Subject: [PATCH 9/9] selftests/filesystems: add fourth 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-v1-9-53a44c20d44e@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=985; i=brauner@kernel.org; h=from:subject:message-id; bh=IPngv6k4HTtp0L0AG/j88z5uovfA3r+o6pDR1kDrBHI=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMaR/XnC9YWMrE3eVxm1zXR61iPpPFhtjTnFLfhObwnQjM rDqiFRxRykLgxgXg6yYIotDu0m43HKeis1GmRowc1iZQIYwcHEKwESS3zL8lTrL8sf9SYIQX0nI i1/PN1/+JL3xkKE7xxGN6p8zHBpnHGJk+HM61/vJ/69++48onjRQ1DqSuOGC33b+hAvHjCfUvfr 8hRsA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Test that anonymous inodes cannot be open()ed. Signed-off-by: Christian Brauner Reviewed-by: Jan Kara --- tools/testing/selftests/filesystems/anon_inode_test.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/tools/testing/selftests/filesystems/anon_inode_test.c b/tools/testing/selftests/filesystems/anon_inode_test.c index 486496252ddd..e8e0ef1460d2 100644 --- a/tools/testing/selftests/filesystems/anon_inode_test.c +++ b/tools/testing/selftests/filesystems/anon_inode_test.c @@ -48,5 +48,22 @@ TEST(anon_inode_no_exec) EXPECT_EQ(close(fd_context), 0); } +TEST(anon_inode_no_open) +{ + int fd_context; + + fd_context = sys_fsopen("tmpfs", 0); + ASSERT_GE(fd_context, 0); + + ASSERT_GE(dup2(fd_context, 500), 0); + ASSERT_EQ(close(fd_context), 0); + fd_context = 500; + + ASSERT_LT(open("/proc/self/fd/500", 0), 0); + ASSERT_EQ(errno, ENXIO); + + EXPECT_EQ(close(fd_context), 0); +} + TEST_HARNESS_MAIN