The patch titled
Subject: kasan: move update_kunit_status to start_report
has been removed from the -mm tree. Its filename was
kasan-move-update_kunit_status-to-start_report.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: move update_kunit_status to start_report
Instead of duplicating calls to update_kunit_status() in every error
report routine, call it once in start_report(). Pass the sync flag as an
additional argument to start_report().
Link: https://lkml.kernel.org/r/cae5c845a0b6f3c867014e53737cdac56b11edc7.1646237226.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/report.c | 75 +++++++++++++++++++-------------------------
1 file changed, 34 insertions(+), 41 deletions(-)
--- a/mm/kasan/report.c~kasan-move-update_kunit_status-to-start_report
+++ a/mm/kasan/report.c
@@ -98,13 +98,40 @@ static void print_error_description(stru
info->access_addr, current->comm, task_pid_nr(current));
}
+#if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST)
+static void update_kunit_status(bool sync)
+{
+ struct kunit *test;
+ struct kunit_resource *resource;
+ struct kunit_kasan_status *status;
+
+ test = current->kunit_test;
+ if (!test)
+ return;
+
+ resource = kunit_find_named_resource(test, "kasan_status");
+ if (!resource) {
+ kunit_set_failure(test);
+ return;
+ }
+
+ status = (struct kunit_kasan_status *)resource->data;
+ WRITE_ONCE(status->report_found, true);
+ WRITE_ONCE(status->sync_fault, sync);
+
+ kunit_put_resource(resource);
+}
+#else
+static void update_kunit_status(bool sync) { }
+#endif
+
static DEFINE_SPINLOCK(report_lock);
-static void start_report(unsigned long *flags)
+static void start_report(unsigned long *flags, bool sync)
{
- /*
- * Make sure we don't end up in loop.
- */
+ /* Update status of the currently running KASAN test. */
+ update_kunit_status(sync);
+ /* Make sure we don't end up in loop. */
kasan_disable_current();
spin_lock_irqsave(&report_lock, *flags);
pr_err("==================================================================\n");
@@ -356,33 +383,6 @@ static bool report_enabled(void)
return !test_and_set_bit(KASAN_BIT_REPORTED, &kasan_flags);
}
-#if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST)
-static void update_kunit_status(bool sync)
-{
- struct kunit *test;
- struct kunit_resource *resource;
- struct kunit_kasan_status *status;
-
- test = current->kunit_test;
- if (!test)
- return;
-
- resource = kunit_find_named_resource(test, "kasan_status");
- if (!resource) {
- kunit_set_failure(test);
- return;
- }
-
- status = (struct kunit_kasan_status *)resource->data;
- WRITE_ONCE(status->report_found, true);
- WRITE_ONCE(status->sync_fault, sync);
-
- kunit_put_resource(resource);
-}
-#else
-static void update_kunit_status(bool sync) { }
-#endif
-
void kasan_report_invalid_free(void *object, unsigned long ip)
{
unsigned long flags;
@@ -390,9 +390,7 @@ void kasan_report_invalid_free(void *obj
object = kasan_reset_tag(object);
- update_kunit_status(true);
-
- start_report(&flags);
+ start_report(&flags, true);
pr_err("BUG: KASAN: double-free or invalid-free in %pS\n", (void *)ip);
kasan_print_tags(tag, object);
pr_err("\n");
@@ -406,9 +404,7 @@ void kasan_report_async(void)
{
unsigned long flags;
- update_kunit_status(false);
-
- start_report(&flags);
+ start_report(&flags, false);
pr_err("BUG: KASAN: invalid-access\n");
pr_err("Asynchronous mode enabled: no access details available\n");
pr_err("\n");
@@ -425,9 +421,8 @@ static void __kasan_report(unsigned long
void *untagged_addr;
unsigned long flags;
- update_kunit_status(true);
-
disable_trace_on_warning();
+ start_report(&flags, true);
tagged_addr = (void *)addr;
untagged_addr = kasan_reset_tag(tagged_addr);
@@ -442,8 +437,6 @@ static void __kasan_report(unsigned long
info.is_write = is_write;
info.ip = ip;
- start_report(&flags);
-
print_error_description(&info);
if (addr_has_metadata(untagged_addr))
kasan_print_tags(get_tag(tagged_addr), info.first_bad_addr);
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
stacktrace-add-interface-based-on-shadow-call-stack.patch
arm64-scs-save-scs_sp-values-per-cpu-when-switching-stacks.patch
arm64-implement-stack_trace_save_shadow.patch
kasan-use-stack_trace_save_shadow.patch
