diff options
Diffstat (limited to 'kernel/kcsan/core.c')
| -rw-r--r-- | kernel/kcsan/core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/kcsan/core.c b/kernel/kcsan/core.c index e3c7d8f34f2f..82c2bef827d4 100644 --- a/kernel/kcsan/core.c +++ b/kernel/kcsan/core.c @@ -456,6 +456,13 @@ static __always_inline void check_access(const volatile void *ptr, size_t size, long encoded_watchpoint; /* + * Do nothing for 0 sized check; this comparison will be optimized out + * for constant sized instrumentation (__tsan_{read,write}N). + */ + if (unlikely(size == 0)) + return; + + /* * Avoid user_access_save in fast-path: find_watchpoint is safe without * user_access_save, as the address that ptr points to is only used to * check if a watchpoint exists; ptr is never dereferenced. |