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[34.38.134.32]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-381c116ac7dsm18938607f8f.105.2024.11.06.04.18.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Nov 2024 04:18:05 -0800 (PST) From: Tudor Ambarus To: tfiga@chromium.org Cc: m.szyprowski@samsung.com, mchehab@kernel.org, yunkec@chromium.org, hverkuil@xs4all.nl, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, andre.draszik@linaro.org, kernel-team@android.com, willmcvicker@google.com, Tudor Ambarus , stable@vger.kernel.org Subject: [PATCH] media: videobuf2-core: copy vb planes unconditionally Date: Wed, 6 Nov 2024 12:18:02 +0000 Message-ID: <20241106121802.2939237-1-tudor.ambarus@linaro.org> X-Mailer: git-send-email 2.47.0.199.ga7371fff76-goog Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Copy the relevant data from userspace to the vb->planes unconditionally as it's possible some of the fields may have changed after the buffer has been validated. Keep the dma_buf_put(planes[plane].dbuf) calls in the first `if (!reacquired)` case, in order to be close to the plane validation code where the buffers were got in the first place. Cc: stable@vger.kernel.org Fixes: 95af7c00f35b ("media: videobuf2-core: release all planes first in __prepare_dmabuf()") Signed-off-by: Tudor Ambarus Acked-by: Tomasz Figa --- .../media/common/videobuf2/videobuf2-core.c | 28 ++++++++++--------- 1 file changed, 15 insertions(+), 13 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index f07dc53a9d06..c0cc441b5164 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -1482,18 +1482,23 @@ static int __prepare_dmabuf(struct vb2_buffer *vb) } vb->planes[plane].dbuf_mapped = 1; } + } else { + for (plane = 0; plane < vb->num_planes; ++plane) + dma_buf_put(planes[plane].dbuf); + } - /* - * Now that everything is in order, copy relevant information - * provided by userspace. - */ - for (plane = 0; plane < vb->num_planes; ++plane) { - vb->planes[plane].bytesused = planes[plane].bytesused; - vb->planes[plane].length = planes[plane].length; - vb->planes[plane].m.fd = planes[plane].m.fd; - vb->planes[plane].data_offset = planes[plane].data_offset; - } + /* + * Now that everything is in order, copy relevant information + * provided by userspace. + */ + for (plane = 0; plane < vb->num_planes; ++plane) { + vb->planes[plane].bytesused = planes[plane].bytesused; + vb->planes[plane].length = planes[plane].length; + vb->planes[plane].m.fd = planes[plane].m.fd; + vb->planes[plane].data_offset = planes[plane].data_offset; + } + if (reacquired) { /* * Call driver-specific initialization on the newly acquired buffer, * if provided. @@ -1503,9 +1508,6 @@ static int __prepare_dmabuf(struct vb2_buffer *vb) dprintk(q, 1, "buffer initialization failed\n"); goto err_put_vb2_buf; } - } else { - for (plane = 0; plane < vb->num_planes; ++plane) - dma_buf_put(planes[plane].dbuf); } ret = call_vb_qop(vb, buf_prepare, vb);