+ kfence-use-error_report_end-tracepoint.patch added to -mm tree

+ kfence-use-error_report_end-tracepoint.patch added to -mm tree

[akpm]

The patch titled
     Subject: kfence: use error_report_end tracepoint
has been added to the -mm tree.  Its filename is
     kfence-use-error_report_end-tracepoint.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/kfence-use-error_report_end-tracepoint.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/kfence-use-error_report_end-tracepoint.patch

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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------------------------------------------------------
From: Alexander Potapenko <glider@google.com>
Subject: kfence: use error_report_end tracepoint

Make it possible to trace KFENCE error reporting.  A good usecase is
watching for trace events from the userspace to detect and process memory
corruption reports from the kernel.

Link: https://lkml.kernel.org/r/20210121131915.1331302-3-glider@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Suggested-by: Marco Elver <elver@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kfence/report.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/mm/kfence/report.c~kfence-use-error_report_end-tracepoint
+++ a/mm/kfence/report.c
@@ -14,6 +14,7 @@
 #include <linux/seq_file.h>
 #include <linux/stacktrace.h>
 #include <linux/string.h>
+#include <trace/events/error_report.h>
 
 #include <asm/kfence.h>
 
@@ -246,6 +247,7 @@ void kfence_report_error(unsigned long a
 		show_regs(regs);
 	else
 		dump_stack_print_info(KERN_ERR);
+	trace_error_report_end(ERROR_DETECTOR_KFENCE, address);
 	pr_err("==================================================================\n");
 
 	lockdep_on();
_

Patches currently in -mm which might be from glider@google.com are

mm-add-kernel-electric-fence-infrastructure.patch
x86-kfence-enable-kfence-for-x86.patch
mm-kfence-insert-kfence-hooks-for-slab.patch
mm-kfence-insert-kfence-hooks-for-slub.patch
kfence-kasan-make-kfence-compatible-with-kasan.patch
tracing-add-error_report_end-trace-point.patch
kfence-use-error_report_end-tracepoint.patch
kasan-use-error_report_end-tracepoint.patch