* [merged] kasan-make-addr_has_metadata-return-true-for-valid-addresses.patch removed from -mm tree
@ 2021-02-08 17:21 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2021-02-08 17:21 UTC (permalink / raw)
To: andreyknvl, aryabinin, catalin.marinas, dvyukov, glider, leonro,
mark.rutland, mm-commits, naresh.kamboju, paulmck,
vincenzo.frascino, will
The patch titled
Subject: kasan: make addr_has_metadata() return true for valid addresses
has been removed from the -mm tree. Its filename was
kasan-make-addr_has_metadata-return-true-for-valid-addresses.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Vincenzo Frascino <vincenzo.frascino@arm.com>
Subject: kasan: make addr_has_metadata() return true for valid addresses
Currently, addr_has_metadata() returns true for every address. An invalid
address (e.g. NULL) passed to the function when, KASAN_HW_TAGS is
enabled, leads to a kernel panic.
Make addr_has_metadata() return true for valid addresses only.
Note: KASAN_HW_TAGS support for vmalloc will be added with a future patch.
Link: https://lkml.kernel.org/r/20210126134409.47894-3-vincenzo.frascino@arm.com
Fixes: 2e903b91479782b7 ("kasan, arm64: implement HW_TAGS runtime")
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Leon Romanovsky <leonro@mellanox.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/kasan/kasan.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/kasan/kasan.h~kasan-make-addr_has_metadata-return-true-for-valid-addresses
+++ a/mm/kasan/kasan.h
@@ -209,7 +209,7 @@ bool check_memory_region(unsigned long a
static inline bool addr_has_metadata(const void *addr)
{
- return true;
+ return (is_vmalloc_addr(addr) || virt_addr_valid(addr));
}
#endif /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */
_
Patches currently in -mm which might be from vincenzo.frascino@arm.com are
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2021-02-08 17:24 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-02-08 17:21 [merged] kasan-make-addr_has_metadata-return-true-for-valid-addresses.patch removed from -mm tree akpm
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.