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Tue, 09 Sep 2025 06:35:01 -0700 (PDT) Received: from [192.168.1.116] ([96.43.243.2]) by smtp.gmail.com with ESMTPSA id ca18e2360f4ac-88765e370c2sm494498739f.12.2025.09.09.06.35.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 09 Sep 2025 06:35:01 -0700 (PDT) Message-ID: <4c322a03-058f-4caa-a741-7dfec0d3c55b@kernel.dk> Date: Tue, 9 Sep 2025 07:35:00 -0600 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Jens Axboe Subject: Re: [PATCH v2 2/5] io_uring/rsrc: respect submitter_task in io_register_clone_buffers() To: Caleb Sander Mateos Cc: io-uring@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250904170902.2624135-1-csander@purestorage.com> <20250904170902.2624135-3-csander@purestorage.com> Content-Language: en-US In-Reply-To: <20250904170902.2624135-3-csander@purestorage.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/4/25 11:08 AM, Caleb Sander Mateos wrote: > diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c > index 2d15b8785a95..1e5b7833076a 100644 > --- a/io_uring/rsrc.c > +++ b/io_uring/rsrc.c > @@ -1298,14 +1298,21 @@ int io_register_clone_buffers(struct io_ring_ctx *ctx, void __user *arg) > > src_ctx = file->private_data; > if (src_ctx != ctx) { > mutex_unlock(&ctx->uring_lock); > lock_two_rings(ctx, src_ctx); > + > + if (src_ctx->submitter_task && > + src_ctx->submitter_task != current) { > + ret = -EEXIST; > + goto out; > + } Spurious end-of-line space detected here, pruned while merging. -- Jens Axboe