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a18ee3f31f
This adds tests for the edge case discussed in [1], with specific ones for rename and link operations when the operands are through disconnected paths, as that go through a separate code path in Landlock. This has resulted in a warning, due to collect_domain_accesses() not expecting to reach a different root from path->mnt: # RUN layout1_bind.path_disconnected ... # OK layout1_bind.path_disconnected ok 96 layout1_bind.path_disconnected # RUN layout1_bind.path_disconnected_rename ... [..] ------------[ cut here ]------------ [..] WARNING: CPU: 3 PID: 385 at security/landlock/fs.c:1065 collect_domain_accesses [..] ... [..] RIP: 0010:collect_domain_accesses (security/landlock/fs.c:1065 (discriminator 2) security/landlock/fs.c:1031 (discriminator 2)) [..] current_check_refer_path (security/landlock/fs.c:1205) [..] ... [..] hook_path_rename (security/landlock/fs.c:1526) [..] security_path_rename (security/security.c:2026 (discriminator 1)) [..] do_renameat2 (fs/namei.c:5264) # OK layout1_bind.path_disconnected_rename ok 97 layout1_bind.path_disconnected_rename Move the const char definitions a bit above so that we can use the path for s4d1 in cleanup code. Cc: Günther Noack <gnoack@google.com> Cc: Song Liu <song@kernel.org> Link: https://lore.kernel.org/r/027d5190-b37a-40a8-84e9-4ccbc352bcdf@maowtm.org [1] Signed-off-by: Tingmao Wang <m@maowtm.org> Link: https://lore.kernel.org/r/20251128172200.760753-4-mic@digikod.net Signed-off-by: Mickaël Salaün <mic@digikod.net>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.