diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2025-02-14 22:48:15 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-27 04:30:21 -0800 |
| commit | 506b9b5e8c2d2a411ea8fe361333f5081c56d23a (patch) | |
| tree | 55f3b26d27d86f9e06412ff2f9e6048ce82461e2 | |
| parent | 79151b47bf23ed18e959b764c1dbc1360c6bcc82 (diff) | |
io_uring: prevent opcode speculation
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/7eddbf31c8ca0a3947f8ed98271acc2b4349c016.1739568408.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | io_uring/io_uring.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 21f1bcba2f52..cf28d29fffbf 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -2053,6 +2053,8 @@ 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_issue_defs[opcode]; if (unlikely(sqe_flags & ~SQE_COMMON_FLAGS)) { /* enforce forwards compatibility on users */ |