diff options
| author | Marco Elver <elver@google.com> | 2021-02-26 02:19:40 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-26 18:41:02 +0100 |
| commit | 35beccf0926d42ee0d56e41979ec8cdf814c4769 (patch) | |
| tree | 76e12c5cf818b3abcd59d1466c52c518202b0873 /mm/kfence/kfence.h | |
| parent | MAINTAINERS: add entry for KFENCE (diff) | |
| download | linux-35beccf0926d42ee0d56e41979ec8cdf814c4769.tar.xz linux-35beccf0926d42ee0d56e41979ec8cdf814c4769.zip | |
kfence: report sensitive information based on no_hash_pointers
We cannot rely on CONFIG_DEBUG_KERNEL to decide if we're running a "debug
kernel" where we can safely show potentially sensitive information in the
kernel log.
Instead, simply rely on the newly introduced "no_hash_pointers" to print
unhashed kernel pointers, as well as decide if our reports can include
other potentially sensitive information such as registers and corrupted
bytes.
Link: https://lkml.kernel.org/r/20210223082043.1972742-1-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Cc: Timur Tabi <timur@kernel.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Jann Horn <jannh@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/kfence/kfence.h')
| -rw-r--r-- | mm/kfence/kfence.h | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/mm/kfence/kfence.h b/mm/kfence/kfence.h index 1accc840dbbe..24065321ff8a 100644 --- a/mm/kfence/kfence.h +++ b/mm/kfence/kfence.h @@ -16,13 +16,6 @@ #include "../slab.h" /* for struct kmem_cache */ -/* For non-debug builds, avoid leaking kernel pointers into dmesg. */ -#ifdef CONFIG_DEBUG_KERNEL -#define PTR_FMT "%px" -#else -#define PTR_FMT "%p" -#endif - /* * Get the canary byte pattern for @addr. Use a pattern that varies based on the * lower 3 bits of the address, to detect memory corruptions with higher |