From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 212DDC5DF82 for ; Thu, 20 Aug 2026 07:46:16 +0000 (UTC) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id B9E103CE127 for ; Thu, 20 Aug 2026 09:46:14 +0200 (CEST) Received: from in-6.smtp.seeweb.it (in-6.smtp.seeweb.it [IPv6:2001:4b78:1:20::6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id CAC493CDED8 for ; Thu, 20 Aug 2026 09:44:59 +0200 (CEST) Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2a07:de40:b251:101:10:150:64:1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by in-6.smtp.seeweb.it (Postfix) with ESMTPS id B887E14000FD for ; Thu, 20 Aug 2026 09:44:58 +0200 (CEST) Received: from imap1.dmz-prg2.suse.org (unknown [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id DCBA884F96; Thu, 20 Aug 2026 07:44:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1787211888; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=9bFKpqoN+u4SWSwmtEdwdlRTbSypKpZ2HbwCyhs5uu0=; b=brqn9/+HMEC8Cg/LFOEq/zp1twT2sL/eIMUhAwCkExpViXnBAYzMZDhS+AfG9goQulLiZ9 ntYlkoa94bwj89Kh2uM+o9uk3elxuqqXEKOovGa2gvm9gMjfLjZ0F8PXCkGDC0lhZxrb0h zfY9Igf6YwGtgKO2Lklhlw+Ib86qRZo= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1787211888; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=9bFKpqoN+u4SWSwmtEdwdlRTbSypKpZ2HbwCyhs5uu0=; b=TaozhnCg6MbT26GbZRGSdbIuTtp5ZILF4usG1GF8HsT4tu+usiJmPXdT60BUiFWCKD/+ZU gLZJjCtWuXvV0PDw== Authentication-Results: smtp-out1.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1787211883; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=9bFKpqoN+u4SWSwmtEdwdlRTbSypKpZ2HbwCyhs5uu0=; b=O9fBpXx+aahYqsx/1epiWK9zSsiV8D1VGWlBJ7vfDUrKfrd2Jeo5crxL2Xi2W4kx9V9oN9 mpFimPUiL8OItb1Lx1Yec09YLkGgMreE12BDTWph0q/+YRVR3disR9Ef1j3YAxMdpjqfcg Jlgcjm1/k89iVB2OZWkDhmP9CxDuVdw= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1787211883; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=9bFKpqoN+u4SWSwmtEdwdlRTbSypKpZ2HbwCyhs5uu0=; b=+8nfJog0M91drwgaUam3y4Wq2WLGylOOVbUMH9vmyAzGLP4xVzkwupxX7Zui3mxgBn+/np wnt7HqKP8hETSICw== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id A94FE27A8; Thu, 20 Aug 2026 07:44:43 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id F/VlJWuwhmr3YgAAD6G6ig (envelope-from ); Thu, 20 Aug 2026 07:44:43 +0000 From: Andrea Cervesato Date: Thu, 20 Aug 2026 09:44:40 +0200 Message-Id: <20260820-fchroot-v2-0-062ed20957a0@suse.com> MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAGiwhmoC/2WNQQ7CIBREr9L8tRhARevKe5guFD6CiaXhU6Jpu LtQl2ZWL3kzswBh9Ehw7haImD35MFaQmw60u40PZN5UBsml4ifRM6tdDCExpYQ4WMPNvj9Ctae I1r/XpevwY5rvT9Sp1ZvhPKUQP+tVFs37X82CcSaNlnpXY2V/oZlwq8MLhlLKF5kxlQOvAAAA X-Change-ID: 20260819-fchroot-66115fd0d497 To: Linux Test Project X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1787211883; l=4952; i=andrea.cervesato@suse.com; s=20251210; h=from:subject:message-id; bh=AAgINonhILI7IJElFbSKE82fQVwX1tQvYB5dXkt43hk=; b=B4A9zOqpKK7KbF5T+ZgN7Ma2CD7G5vi7qFyPpDrS1CnHNYHnAYu4JySA6JZRagnit2EtRe5bS eJLoQyD2HZSC9bU0PDkJpdoqbZRRHHWgfO6+K1KxFkqUjTk+AiaAcWI X-Developer-Key: i=andrea.cervesato@suse.com; a=ed25519; pk=zKY+6GCauOiuHNZ//d8PQ/UL4jFCTKbXrzXAOQSLevI= X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; TO_DN_ALL(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; MIME_TRACE(0.00)[0:+]; FROM_EQ_ENVFROM(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo, linux.it:email, suse.com:mid, suse.com:email] X-Virus-Scanned: clamav-milter 1.0.9 at in-6.smtp.seeweb.it X-Virus-Status: Clean Subject: [LTP] [PATCH v2 00/16] fchroot: add fchroot() testing suite X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" fchroot() is a new syscall introduced in the Linux v7.3 development cycle together with failfs, a kernel internal filesystem where every operation fails with EOPNOTSUPP. The syscall is the fd-based counterpart of chroot(2): it moves the process root to the directory referenced by a file descriptor, or to the failfs root via the FD_FAILFS_ROOT sentinel. The series first updates the architecture syscall number tables and adds lapi fallback definitions for the new fd sentinels, then adds 13 tests covering: - the basic directory fd use case and the argument error paths (EINVAL, EBADF, ENOTDIR) - the permission checks, both execute permission and CAP_SYS_CHROOT - entering failfs as root: EOPNOTSUPP on every absolute lookup, unreachable working directory, root that can not be referenced or pinned, path walks anchored at file descriptors, execve blocked, fork inheritance and the setns() escape - the unprivileged entry rules: no_new_privs, shared fs_struct and the already chrooted case fchroot() is not part of any released kernel yet, so the tests are added to runtest/staging and each patch carries the [STAGING] prefix as required by the LTP ground rules. The testing suite creation has been assisted by GLM 5.3. Signed-off-by: Andrea Cervesato --- Changes in v2: - make description more readable - invert fork() logic for the main test process - fix the issues found by the agent - Link to v1: https://lore.kernel.org/20260819-fchroot-v1-0-2dc2c3c3cf29@suse.com To: Linux Test Project --- Andrea Cervesato (16): syscalls: add v7.3 syscall numbers syscalls: update outdated syscall entries [STAGING] lapi: fallback fchroot() parameters [STAGING] fchroot01: test fchroot() with a directory fd [STAGING] fchroot02: test fchroot() invalid arguments [STAGING] fchroot03: test fchroot() permission checks [STAGING] fchroot04: test fchroot() into failfs as root [STAGING] fchroot05: test failfs root can not be referenced [STAGING] fchroot06: test path walks under failfs root [STAGING] fchroot07: test execve blocked by failfs root [STAGING] fchroot08: test failfs root fork inheritance [STAGING] fchroot09: test setns escape from failfs root [STAGING] fchroot10: test failfs entry without no_new_privs [STAGING] fchroot11: test failfs entry with no_new_privs [STAGING] fchroot12: test failfs entry with shared fs_struct [STAGING] fchroot13: test failfs entry when chrooted include/lapi/fcntl.h | 13 +++ include/lapi/syscalls/arc.in | 3 + include/lapi/syscalls/arm.in | 4 +- include/lapi/syscalls/arm64.in | 3 + include/lapi/syscalls/i386.in | 4 +- include/lapi/syscalls/loongarch64.in | 3 + include/lapi/syscalls/mips64.in | 5 +- include/lapi/syscalls/mips64n32.in | 5 +- include/lapi/syscalls/mipso32.in | 5 +- include/lapi/syscalls/parisc.in | 4 +- include/lapi/syscalls/powerpc.in | 4 +- include/lapi/syscalls/powerpc64.in | 4 +- include/lapi/syscalls/s390.in | 5 +- include/lapi/syscalls/s390x.in | 5 +- include/lapi/syscalls/sh.in | 4 +- include/lapi/syscalls/sparc.in | 5 +- include/lapi/syscalls/sparc64.in | 5 +- include/lapi/syscalls/x86_64.in | 5 +- runtest/staging | 14 +++ testcases/kernel/syscalls/fchroot/.gitignore | 13 +++ testcases/kernel/syscalls/fchroot/Makefile | 7 ++ testcases/kernel/syscalls/fchroot/fchroot01.c | 59 +++++++++++++ testcases/kernel/syscalls/fchroot/fchroot02.c | 80 ++++++++++++++++++ testcases/kernel/syscalls/fchroot/fchroot03.c | 78 +++++++++++++++++ testcases/kernel/syscalls/fchroot/fchroot04.c | 70 +++++++++++++++ testcases/kernel/syscalls/fchroot/fchroot05.c | 75 +++++++++++++++++ testcases/kernel/syscalls/fchroot/fchroot06.c | 117 ++++++++++++++++++++++++++ testcases/kernel/syscalls/fchroot/fchroot07.c | 72 ++++++++++++++++ testcases/kernel/syscalls/fchroot/fchroot08.c | 69 +++++++++++++++ testcases/kernel/syscalls/fchroot/fchroot09.c | 87 +++++++++++++++++++ testcases/kernel/syscalls/fchroot/fchroot10.c | 50 +++++++++++ testcases/kernel/syscalls/fchroot/fchroot11.c | 70 +++++++++++++++ testcases/kernel/syscalls/fchroot/fchroot12.c | 85 +++++++++++++++++++ testcases/kernel/syscalls/fchroot/fchroot13.c | 63 ++++++++++++++ 34 files changed, 1076 insertions(+), 19 deletions(-) --- base-commit: 567528e2f809c1309802433703c083bd15ab81a8 change-id: 20260819-fchroot-66115fd0d497 Best regards, -- Andrea Cervesato -- Mailing list info: https://lists.linux.it/listinfo/ltp