On Mon, Jan 23, 2023 at 03:03:24PM +0000, Pavel Begunkov wrote: > [ upstream commit 8579538c89e33ce78be2feb41e07489c8cbf8f31 ] > > IORING_SETUP_R_DISABLED rings don't have the submitter task set, so > it's not always safe to use ->submitter_task. Disallow posting msg_ring > messaged to disabled rings. Also add task NULL check for loosy sync > around testing for IORING_SETUP_R_DISABLED. > > Cc: stable@xxxxxxxxxxxxxxx > Fixes: 6d043ee1164ca ("io_uring: do msg_ring in target task via tw") This commit is only in 6.2-rc1, so is it really relevant for this commit to go to 6.1? thanks, greg k-h