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b99acdcbfe
linux/mm/kasan
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Vincenzo Frascino b99acdcbfe 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: 2e903b9147 ("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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-02-05 11:03:47 -08:00
..
common.c kasan, mm: allow cache merging with no metadata 2020-12-22 12:55:09 -08:00
generic.c kasan: fix null pointer dereference in kasan_record_aux_stack 2020-12-29 15:36:49 -08:00
hw_tags.c kasan: fix HW_TAGS boot parameters 2021-01-24 10:34:52 -08:00
init.c kasan: fix incorrect arguments passing in kasan_add_zero_shadow 2021-01-24 10:34:52 -08:00
kasan.h kasan: make addr_has_metadata() return true for valid addresses 2021-02-05 11:03:47 -08:00
Makefile kasan, arm64: implement HW_TAGS runtime 2020-12-22 12:55:08 -08:00
quarantine.c kasan: sanitize objects when metadata doesn't fit 2020-12-22 12:55:09 -08:00
report_generic.c kasan: separate metadata_fetch_row for each mode 2020-12-22 12:55:07 -08:00
report_hw_tags.c kasan: inline kasan_reset_tag for tag-based modes 2020-12-22 12:55:08 -08:00
report_sw_tags.c kasan: sanitize objects when metadata doesn't fit 2020-12-22 12:55:09 -08:00
report.c kasan: sanitize objects when metadata doesn't fit 2020-12-22 12:55:09 -08:00
shadow.c kasan: don't round_up too much 2020-12-22 12:55:09 -08:00
sw_tags.c kasan: sanitize objects when metadata doesn't fit 2020-12-22 12:55:09 -08:00