Re: [PATCH v2 0/5] Add sysfs interface to collect reports from debugging tools

Should have CCd linux-api@, please do next time

On 1/15/21 2:03 PM, Alexander Potapenko wrote:

This patchset adds a library that captures error reports from debugging
tools like KASAN or KFENCE and exposes those reports to userspace via
sysfs. Report capturing is controlled by two new types of tracepoints:
error_report_start and error_report_end, that must be added to the tools
that want to use this new feature.

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 (5):
  tracing: add error_report trace points
  lib: add error_report_notify to collect debugging tools' reports
  docs: ABI: add /sys/kernel/error_report/ documentation
  kfence: use error_report_start and error_report_end tracepoints
  kasan: use error_report_start and error_report_end tracepoints

 .../ABI/testing/sysfs-kernel-error_report     |  41 +++
 include/trace/events/error_report.h           |  84 ++++++
 kernel/trace/Makefile                         |   1 +
 kernel/trace/error_report-traces.c            |  11 +
 lib/Kconfig.debug                             |  14 +
 lib/Makefile                                  |   2 +
 lib/error_report_notify.c                     | 278 ++++++++++++++++++
 mm/kasan/report.c                             |  15 +-
 mm/kfence/report.c                            |   3 +
 9 files changed, 443 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-kernel-error_report
 create mode 100644 include/trace/events/error_report.h
 create mode 100644 kernel/trace/error_report-traces.c
 create mode 100644 lib/error_report_notify.c

On Fri, Jan 15, 2021 at 2:06 PM Vlastimil Babka [off-list ref] wrote:

Should have CCd linux-api@, please do next time

Thanks, will do!
Shall I also CC the v2 ABI patch explicitly?

On Fri, Jan 15, 2021 at 2:09 PM Alexander Potapenko [off-list ref] wrote:

On Fri, Jan 15, 2021 at 2:06 PM Vlastimil Babka [off-list ref] wrote:

quoted

Should have CCd linux-api@, please do next time

Thanks, will do!
Shall I also CC the v2 ABI patch explicitly?

I'll be dropping the sysfs changes from this patchset, but assume it
still makes sense to CC linux-api@ since v3 will be introducing
tracepoints.