diff options
| author | Vincenzo Frascino <[email protected]> | 2021-02-04 18:32:53 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2021-02-05 11:03:47 -0800 |
| commit | b99acdcbfe3c8394ddd8b8d89d9bae2bbba4a459 (patch) | |
| tree | 325e9a188b825c56a66b7ba52f07ead2e284e299 | |
| parent | 49c6631d3b4f61a7b5bb0453a885a12bfa06ffd8 (diff) | |
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/[email protected]
Fixes: 2e903b91479782b7 ("kasan, arm64: implement HW_TAGS runtime")
Signed-off-by: Vincenzo Frascino <[email protected]>
Reviewed-by: Andrey Konovalov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Leon Romanovsky <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Naresh Kamboju <[email protected]>
Cc: "Paul E . McKenney" <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/kasan/kasan.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index cc4d9e1d49b1..8c706e7652f2 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -209,7 +209,7 @@ bool check_memory_region(unsigned long addr, size_t size, bool write, 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 */ |