[PATCH v2 4/5] kfence: use error_report_start and error_report_end tracepoints
From: Alexander Potapenko <glider@google.com>
Date: 2021-01-15 13:05:32
Also in:
lkml
Subsystem:
kfence, memory management, the rest · Maintainers:
Alexander Potapenko, Marco Elver, Andrew Morton, Linus Torvalds
Make it possible to trace KFENCE error reporting (in particular, for compatibility with CONFIG_ERROR_REPORT_NOTIFY). Suggested-by: Marco Elver <elver@google.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andrey Konovalov <redacted> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Marco Elver <elver@google.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Sergey Senozhatsky <redacted> Cc: linux-mm@kvack.org Signed-off-by: Alexander Potapenko <glider@google.com> --- v2: - change error_report_start and error_report_end prototypes to accept enum error_detector instead of char* (as suggested by Steven Rostedt) --- mm/kfence/report.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/mm/kfence/report.c b/mm/kfence/report.c
index 4dedc2ff8f28..bbe7dad5f249 100644
--- a/mm/kfence/report.c
+++ b/mm/kfence/report.c@@ -9,6 +9,7 @@ #include <linux/seq_file.h> #include <linux/stacktrace.h> #include <linux/string.h> +#include <trace/events/error_report.h> #include <asm/kfence.h>
@@ -184,6 +185,7 @@ void kfence_report_error(unsigned long address, struct pt_regs *regs, lockdep_off(); pr_err("==================================================================\n"); + trace_error_report_start(ERROR_DETECTOR_KFENCE, address); /* Print report header. */ switch (type) { case KFENCE_ERROR_OOB: {
@@ -232,6 +234,7 @@ void kfence_report_error(unsigned long address, struct pt_regs *regs, show_regs(regs); else dump_stack_print_info(KERN_ERR); + trace_error_report_end(ERROR_DETECTOR_KFENCE, address); pr_err("==================================================================\n"); lockdep_on();
--
2.30.0.284.gd98b1dd5eaa7-goog