This patchset adds a tracepoint, error_repor_end, that is to be used by KFENCE, KASAN, and potentially other bug detection tools, when they print an error report. One of the possible use cases is userspace collection of kernel error reports: interested parties can subscribe to the tracing event via tracefs, and get notified when an error report occurs. v3: - dropped the sysfs interface for log collection - dropped error_report_start tracepoint v2: - added ABI documentation for /sys/kernel/error_report/ - changed error_report_start and error_report end tracepoints to take a fixed set of values for the error detector Alexander Potapenko (3): tracing: add error_report_end trace point kfence: use error_report_end tracepoint kasan: use error_report_end tracepoint include/trace/events/error_report.h | 74 +++++++++++++++++++++++++++++ kernel/trace/Makefile | 1 + kernel/trace/error_report-traces.c | 12 +++++ mm/kasan/report.c | 8 ++-- mm/kfence/report.c | 2 + 5 files changed, 94 insertions(+), 3 deletions(-) create mode 100644 include/trace/events/error_report.h create mode 100644 kernel/trace/error_report-traces.c -- 2.30.0.296.g2bfb1c46d8-goog
