6.10-stable review patch. If anyone has any objections, please let me know.
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From: Pavel Begunkov asml.silence@gmail.com
commit bd44d7e902c2b34c217d3b48874b079760ca7b6e upstream.
IORING_SETUP_IOPOLL rings don't have any netpoll handling, let's fail attempts to register netpolling in this case, there might be people who will mix up IOPOLL and netpoll.
Cc: stable@vger.kernel.org Fixes: ef1186c1a875b ("io_uring: add register/unregister napi function") Signed-off-by: Pavel Begunkov asml.silence@gmail.com Link: https://lore.kernel.org/r/1e7553aee0a8ae4edec6742cd6dd0c1e6914fba8.172181938... Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- io_uring/napi.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/io_uring/napi.c +++ b/io_uring/napi.c @@ -222,6 +222,8 @@ int io_register_napi(struct io_ring_ctx }; struct io_uring_napi napi;
+ if (ctx->flags & IORING_SETUP_IOPOLL) + return -EINVAL; if (copy_from_user(&napi, arg, sizeof(napi))) return -EFAULT; if (napi.pad[0] || napi.pad[1] || napi.pad[2] || napi.resv)