diff options
Diffstat (limited to 'kernel/kcsan')
| -rw-r--r-- | kernel/kcsan/encoding.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/kcsan/encoding.h b/kernel/kcsan/encoding.h index 1a6db2f797ac..4f73db6d1407 100644 --- a/kernel/kcsan/encoding.h +++ b/kernel/kcsan/encoding.h @@ -48,7 +48,11 @@ static inline bool check_encodable(unsigned long addr, size_t size) { - return size <= MAX_ENCODABLE_SIZE; + /* + * While we can encode addrs<PAGE_SIZE, avoid crashing with a NULL + * pointer deref inside KCSAN. + */ + return addr >= PAGE_SIZE && size <= MAX_ENCODABLE_SIZE; } static inline long |