From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- Documentation/trace/index.rst | 110 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+) create mode 100644 Documentation/trace/index.rst (limited to 'Documentation/trace/index.rst') diff --git a/Documentation/trace/index.rst b/Documentation/trace/index.rst new file mode 100644 index 000000000..5d9bf4694 --- /dev/null +++ b/Documentation/trace/index.rst @@ -0,0 +1,110 @@ +================================ +Linux Tracing Technologies Guide +================================ + +Tracing in the Linux kernel is a powerful mechanism that allows +developers and system administrators to analyze and debug system +behavior. This guide provides documentation on various tracing +frameworks and tools available in the Linux kernel. + +Introduction to Tracing +----------------------- + +This section provides an overview of Linux tracing mechanisms +and debugging approaches. + +.. toctree:: + :maxdepth: 1 + + debugging + tracepoints + tracepoint-analysis + ring-buffer-map + +Core Tracing Frameworks +----------------------- + +The following are the primary tracing frameworks integrated into +the Linux kernel. + +.. toctree:: + :maxdepth: 1 + + ftrace + ftrace-design + ftrace-uses + kprobes + kprobetrace + fprobetrace + eprobetrace + fprobe + ring-buffer-design + +Event Tracing and Analysis +-------------------------- + +A detailed explanation of event tracing mechanisms and their +applications. + +.. toctree:: + :maxdepth: 1 + + events + events-kmem + events-power + events-nmi + events-msr + events-pci + events-pci-controller + boottime-trace + histogram + histogram-design + +Hardware and Performance Tracing +-------------------------------- + +This section covers tracing features that monitor hardware +interactions and system performance. + +.. toctree:: + :maxdepth: 1 + + intel_th + stm + sys-t + coresight/index + rv/index + hisi-ptt + mmiotrace + hwlat_detector + osnoise-tracer + timerlat-tracer + +User-Space Tracing +------------------ + +These tools allow tracing user-space applications and +interactions. + +.. toctree:: + :maxdepth: 1 + + user_events + uprobetracer + +Remote Tracing +-------------- + +This section covers the framework to read compatible ring-buffers, written by +entities outside of the kernel (most likely firmware or hypervisor) + +.. toctree:: + :maxdepth: 1 + + remotes + +Additional Resources +-------------------- + +For more details, refer to the respective documentation of each +tracing tool and framework. -- cgit v1.3.1