That is i did,i already test, remove "u64 __tmp…kmsan_unpoison_memory", no help. i only remove kmsan_copy_to_user, fix my issue. 2022-10-20 4:00 GMT+08:00, Marco Elver <elver@xxxxxxxxxx>: > 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 >
