On Thu, Oct 20, 2022 at 03:29AM +0800, youling 257 wrote: [...] > > What arch? > > If x86, can you try to revert only the change to > > instrument_get_user()? (I wonder if the u64 conversion is causing > > issues.) > > > arch x86, this's my revert, > https://github.com/youling257/android-mainline/commit/401cbfa61cbfc20c87a5be8e2dda68ac5702389f > i tried different revert, have to remove kmsan_copy_to_user. There you reverted only instrument_put_user() - does it fix the issue? If not, can you try only something like this (only revert instrument_get_user()): diff --git a/include/linux/instrumented.h b/include/linux/instrumented.h index 501fa8486749..dbe3ec38d0e6 100644 --- a/include/linux/instrumented.h +++ b/include/linux/instrumented.h @@ -167,9 +167,6 @@ instrument_copy_from_user_after(const void *to, const void __user *from, */ #define instrument_get_user(to) \ ({ \ - u64 __tmp = (u64)(to); \ - kmsan_unpoison_memory(&__tmp, sizeof(__tmp)); \ - to = __tmp; \ }) Once we know which one of these is the issue, we can figure out a proper fix. Thanks, -- Marco
