The patch titled
Subject: kasan, arm64: untag address in _virt_addr_is_linear
has been removed from the -mm tree. Its filename was
kasan-arm64-untag-address-in-_virt_addr_is_linear.patch
This patch was dropped because it was merged into mainline or a subsystem tree
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From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan, arm64: untag address in _virt_addr_is_linear
virt_addr_is_linear (which is used by virt_addr_valid) assumes that the
top byte of the address is 0xff, which isn't always the case with
tag-based KASAN.
This patch resets the tag in this macro.
Link: http://lkml.kernel.org/r/df73a37dd5ed37f4deaf77bc718e9f2e590e69b1.1544099024.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Reviewed-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Reviewed-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Acked-by: Will Deacon <will.deacon@xxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/arch/arm64/include/asm/memory.h~kasan-arm64-untag-address-in-_virt_addr_is_linear
+++ a/arch/arm64/include/asm/memory.h
@@ -329,9 +329,10 @@ static inline void *phys_to_virt(phys_ad
#endif
#endif
-#define _virt_addr_is_linear(kaddr) (((u64)(kaddr)) >= PAGE_OFFSET)
-#define virt_addr_valid(kaddr) (_virt_addr_is_linear(kaddr) && \
- _virt_addr_valid(kaddr))
+#define _virt_addr_is_linear(kaddr) \
+ (__tag_reset((u64)(kaddr)) >= PAGE_OFFSET)
+#define virt_addr_valid(kaddr) \
+ (_virt_addr_is_linear(kaddr) && _virt_addr_valid(kaddr))
#include <asm-generic/memory_model.h>
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
