| Message ID | f52a6a9c8a8990d4a831f73c0571e7406aac2bba.1664237592.git.asml.silence@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [for-next,1/1] io_uring: limit registration w/ SINGLE_ISSUER | expand |
On Tue, 27 Sep 2022 01:13:30 +0100, Pavel Begunkov wrote: > IORING_SETUP_SINGLE_ISSUER restricts what tasks can submit requests. > Extend it to registration as well, so non-owning task can't do > registrations. It's not necessary at the moment but might be useful in > the future. > > Applied, thanks! [1/1] io_uring: limit registration w/ SINGLE_ISSUER commit: 567a9ba00f144a1d2ec291e5188043c2db8c2b77 Best regards,
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 73ac6948debb..3f6eb3cf07ac 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -3890,6 +3890,9 @@ static int __io_uring_register(struct io_ring_ctx *ctx, unsigned opcode, if (WARN_ON_ONCE(percpu_ref_is_dying(&ctx->refs))) return -ENXIO; + if (ctx->submitter_task && ctx->submitter_task != current) + return -EEXIST; + if (ctx->restricted) { if (opcode >= IORING_REGISTER_LAST) return -EINVAL;
IORING_SETUP_SINGLE_ISSUER restricts what tasks can submit requests. Extend it to registration as well, so non-owning task can't do registrations. It's not necessary at the moment but might be useful in the future. Cc: <stable@vger.kernel.org> # 6.0 Fixes: 97bbdc06a444 ("io_uring: add IORING_SETUP_SINGLE_ISSUER") Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> --- io_uring/io_uring.c | 3 +++ 1 file changed, 3 insertions(+)