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Mykyta Yatsenko says: ==================== Support freplace prog from user namespace From: Mykyta Yatsenko <yatsenko@meta.com> Freplace programs can't be loaded from user namespace, as bpf_program__set_attach_target() requires searching for target prog BTF, which is locked under CAP_SYS_ADMIN. This patch set enables this use case by: 1. Relaxing capable check in bpf's BPF_BTF_GET_FD_BY_ID, check for CAP_BPF instead of CAP_SYS_ADMIN, support BPF token in attr argument. 2. Pass BPF token around libbpf from bpf_program__set_attach_target() to bpf syscall where capable check is. 3. Validate positive/negative scenarios in selftests This patch set is enabled by the recent libbpf change[1], that introduced bpf_object__prepare() API. Calling bpf_object__prepare() for freplace program before bpf_program__set_attach_target() initializes BPF token, which is then passed to bpf syscall by libbpf. [1] https://lore.kernel.org/all/20250303135752.158343-1-mykyta.yatsenko5@gmail.com/ ==================== Link: https://patch.msgid.link/20250317174039.161275-1-mykyta.yatsenko5@gmail.com Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
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.