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| author | Pavel Begunkov <asml.silence@gmail.com> | 2025-02-14 22:48:15 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-27 04:10:51 -0800 |
| commit | b9826e3b26ec031e9063f64a7c735449c43955e4 (patch) | |
| tree | 67631556a09a5e3d9dab2311e1d7bffca11ae3db /io_uring | |
| parent | f16a74c5f2471597475ededcf6553dc5f69d8b69 (diff) | |
| download | linux-b9826e3b26ec031e9063f64a7c735449c43955e4.tar.gz linux-b9826e3b26ec031e9063f64a7c735449c43955e4.tar.bz2 linux-b9826e3b26ec031e9063f64a7c735449c43955e4.zip | |
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>
Diffstat (limited to 'io_uring')
| -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 b61637dad442..5776440f584c 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -2176,6 +2176,8 @@ 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 */ |