io_uring: fix compat for IORING_REGISTER_FILES_UPDATE
fds field of struct io_uring_files_update is problematic with regards to compat user space, as pointer size is different in 32-bit, 32-on-64-bit, and 64-bit user space. In order to avoid custom handling of compat in the syscall implementation, make fds __u64 and use u64_to_user_ptr in order to retrieve it. Also, align the field naturally and check that no garbage is passed there. Fixes: c3a31e60 ("io_uring: add support for IORING_REGISTER_FILES_UPDATE") Signed-off-by:Eugene Syromiatnikov <esyr@redhat.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
parent
44d28279
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