diff options
| author | Elias Naur <mail@eliasnaur.com> | 2023-05-05 10:18:43 -0600 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2023-05-08 11:56:14 +0300 |
| commit | 4c71ec00c2ea5c6acc75e436bf6d24e6861cb66f (patch) | |
| tree | c0feaaae557a5f1968c2f84bc4d6249a69e251b0 | |
| parent | 1c512d406536d72a393c38c3f6a75fe0fdb9ecb2 (diff) | |
libcamera: v4l2_videodevice: Use O_CLOEXEC when exporting DMA buffers
Files opened internally in libcamera without the O_CLOEXEC file will
remain open upon a call to one of the exec(3) functions. As exec()
doesn't destroy local or global objects, this can lead to various side
effects. Avoid this by opening file descriptors with O_CLOEXEC for all
internal files.
The O_CLOEXEC flag should also be set when obtaining file handles from
the V4L2 VIDIOC_EXPBUF operation, but was missed during the updates to
both d942bdc913c5 ("libcamera: v4l2_device: openat(2) with O_CLOEXEC to
cleanup after exec(3)") and 436b38fd89fe ("libcamera: Open files with
O_CLOEXEC").
Set the O_CLOEXEC flag on calls to ioctl(VIDIOC_EXPBUF).
Fixes: 436b38fd89fe ("libcamera: Open files with O_CLOEXEC")
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
| -rw-r--r-- | src/libcamera/v4l2_videodevice.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp index 1051997e..a72ef64d 100644 --- a/src/libcamera/v4l2_videodevice.cpp +++ b/src/libcamera/v4l2_videodevice.cpp @@ -1471,7 +1471,7 @@ UniqueFD V4L2VideoDevice::exportDmabufFd(unsigned int index, expbuf.type = bufferType_; expbuf.index = index; expbuf.plane = plane; - expbuf.flags = O_RDWR; + expbuf.flags = O_CLOEXEC | O_RDWR; ret = ioctl(VIDIOC_EXPBUF, &expbuf); if (ret < 0) { |