[PATCH 3/3] arm64/syscalls: Move address limit check in loop

The original bug was reported on arm but I am fixing arm64 too because it has a similar code pattern. The work pending loop can call set_fs after addr_limit_user_check removed the _TIF_FSCHECK flag. To prevent the infinite loop, move the addr_limit_user_check call at the beginning of the loop.

[PATCH 3/3] arm64/syscalls: Move address limit check in loop

The original bug was reported on arm but I am fixing arm64 too because it has a similar code pattern. The work pending loop can call set_fs after addr_limit_user_check removed the _TIF_FSCHECK flag. To prevent the infinite loop, move the addr_limit_user_check call at the beginning of the loop.