6.12-stable review patch. If anyone has any objections, please let me know.
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From: Pavel Begunkov asml.silence@gmail.com
commit 1e988c3fe1264708f4f92109203ac5b1d65de50b upstream.
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/7eddbf31c8ca0a3947f8ed98271acc2b4349c016.173956840... Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- io_uring/io_uring.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -2053,6 +2053,8 @@ static int io_init_req(struct io_ring_ct req->opcode = 0; return io_init_fail_req(req, -EINVAL); } + opcode = array_index_nospec(opcode, IORING_OP_LAST); + def = &io_issue_defs[opcode]; if (unlikely(sqe_flags & ~SQE_COMMON_FLAGS)) { /* enforce forwards compatibility on users */