diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2022-09-27 03:13:30 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-10-07 21:25:30 +0300 |
| commit | d7cce96c449e35bbfd41e830b341b95973891eed (patch) | |
| tree | 8e95e41c02cad381a5835910d1492a3bad221339 /io_uring | |
| parent | 4add705e4eebbdd919741de0548d7029c8c92b68 (diff) | |
| download | linux-d7cce96c449e35bbfd41e830b341b95973891eed.tar.xz | |
io_uring: limit registration w/ SINGLE_ISSUER
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>
Link: https://lore.kernel.org/r/f52a6a9c8a8990d4a831f73c0571e7406aac2bba.1664237592.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/io_uring.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index fe6ef64c873e..63f6ce5e5355 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; |