* [PATCH 6.1.y] io_uring: prevent opcode speculation
@ 2026-05-21 5:49 Robert Garcia
2026-05-24 12:09 ` Sasha Levin
0 siblings, 1 reply; 2+ messages in thread
From: Robert Garcia @ 2026-05-21 5:49 UTC (permalink / raw)
To: stable, Pavel Begunkov
Cc: Jens Axboe, Li Zetao, Robert Garcia, io-uring, linux-kernel
From: Pavel Begunkov <asml.silence@gmail.com>
[ Upstream commit 1e988c3fe1264708f4f92109203ac5b1d65de50b ]
sqe->opcode is used for different tables, make sure we santitise it
against speculations.
Cc: stable@vger.kernel.org
Fixes: d3656344fea03 ("io_uring: add lookup table for various opcode needs")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Li Zetao <lizetao1@huawei.com>
Link: https://lore.kernel.org/r/7eddbf31c8ca0a3947f8ed98271acc2b4349c016.1739568408.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Robert Garcia <rob_garcia@163.com>
---
io_uring/io_uring.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index d0d9ff6b87a0..fdb8afdb0135 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -2031,6 +2031,8 @@ static int io_init_req(struct io_ring_ctx *ctx, struct io_kiocb *req,
req->opcode = 0;
return io_init_fail_req(req, -EINVAL);
}
+ opcode = array_index_nospec(opcode, IORING_OP_LAST);
+
def = &io_op_defs[opcode];
if (unlikely(sqe_flags & ~SQE_COMMON_FLAGS)) {
/* enforce forwards compatibility on users */
--
2.34.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH 6.1.y] io_uring: prevent opcode speculation
2026-05-21 5:49 [PATCH 6.1.y] io_uring: prevent opcode speculation Robert Garcia
@ 2026-05-24 12:09 ` Sasha Levin
0 siblings, 0 replies; 2+ messages in thread
From: Sasha Levin @ 2026-05-24 12:09 UTC (permalink / raw)
To: stable, Pavel Begunkov
Cc: Sasha Levin, Jens Axboe, Li Zetao, Robert Garcia, io-uring,
linux-kernel
Queued for 6.1, thanks.
--
Thanks,
Sasha
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2026-05-24 12:09 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-05-21 5:49 [PATCH 6.1.y] io_uring: prevent opcode speculation Robert Garcia
2026-05-24 12:09 ` Sasha Levin
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox