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Joan Bruguera Micó says: ==================== x86/bpf: Fixes for the BPF JIT with retbleed=stuff From: Joan Bruguera Micó <joanbrugueram@gmail.com> Fixes two issues that cause kernels panic when using the BPF JIT with the call depth tracking / stuffing mitigation for Skylake processors (`retbleed=stuff`). Both issues can be triggered by running simple BPF programs (e.g. running the test suite should trigger both). The first (resubmit) fixes a trivial issue related to calculating the destination IP for call instructions with call depth tracking. The second is related to using the correct IP for relocations, related to the recently introduced %rip-relative addressing for PER_CPU_VAR. Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> --- v2: Simplify calculation of "ip". Add more details to the commit message. Joan Bruguera Micó (1): x86/bpf: Fix IP for relocating call depth accounting ==================== Link: https://lore.kernel.org/r/20240401185821.224068-1-ubizjak@gmail.com Signed-off-by: Alexei Starovoitov <ast@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.