The patch titled
Subject: kasan: add comment about UACCESS regions to kasan_report
has been removed from the -mm tree. Its filename was
kasan-add-comment-about-uaccess-regions-to-kasan_report.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: add comment about UACCESS regions to kasan_report
Add a comment explaining why kasan_report() is the only reporting function
that uses user_access_save/restore().
Link: https://lkml.kernel.org/r/1201ca3c2be42c7bd077c53d2e46f4a51dd1476a.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 | 5 +++++
1 file changed, 5 insertions(+)
--- a/mm/kasan/report.c~kasan-add-comment-about-uaccess-regions-to-kasan_report
+++ a/mm/kasan/report.c
@@ -430,6 +430,11 @@ void kasan_report_invalid_free(void *ptr
end_report(&flags, ptr);
}
+/*
+ * kasan_report() is the only reporting function that uses
+ * user_access_save/restore(): kasan_report_invalid_free() cannot be called
+ * from a UACCESS region, and kasan_report_async() is not used on x86.
+ */
bool kasan_report(unsigned long addr, size_t size, bool is_write,
unsigned long ip)
{
_
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
