The patch titled
Subject: kasan: use error_report_end tracepoint
has been removed from the -mm tree. Its filename was
kasan-use-error_report_end-tracepoint.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Alexander Potapenko <glider@xxxxxxxxxx>
Subject: kasan: use error_report_end tracepoint
Make it possible to trace KASAN 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/20210121131915.1331302-4-glider@xxxxxxxxxx
Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>
Suggested-by: Marco Elver <elver@xxxxxxxxxx>
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Petr Mladek <pmladek@xxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/report.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/mm/kasan/report.c~kasan-use-error_report_end-tracepoint
+++ a/mm/kasan/report.c
@@ -25,6 +25,7 @@
#include <linux/module.h>
#include <linux/sched/task_stack.h>
#include <linux/uaccess.h>
+#include <trace/events/error_report.h>
#include <asm/sections.h>
@@ -84,8 +85,9 @@ static void start_report(unsigned long *
pr_err("==================================================================\n");
}
-static void end_report(unsigned long *flags)
+static void end_report(unsigned long *flags, unsigned long addr)
{
+ trace_error_report_end(ERROR_DETECTOR_KASAN, addr);
pr_err("==================================================================\n");
add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
spin_unlock_irqrestore(&report_lock, *flags);
@@ -355,7 +357,7 @@ void kasan_report_invalid_free(void *obj
print_address_description(object, tag);
pr_err("\n");
print_memory_metadata(object);
- end_report(&flags);
+ end_report(&flags, (unsigned long)object);
}
static void __kasan_report(unsigned long addr, size_t size, bool is_write,
@@ -401,7 +403,7 @@ static void __kasan_report(unsigned long
dump_stack();
}
- end_report(&flags);
+ end_report(&flags, addr);
}
bool kasan_report(unsigned long addr, size_t size, bool is_write,
_
Patches currently in -mm which might be from glider@xxxxxxxxxx are
