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authorElias Naur <mail@eliasnaur.com>2023-05-05 10:18:43 -0600
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2023-05-08 11:56:14 +0300
commit4c71ec00c2ea5c6acc75e436bf6d24e6861cb66f (patch)
treec0feaaae557a5f1968c2f84bc4d6249a69e251b0 /Documentation/conf.py
parent1c512d406536d72a393c38c3f6a75fe0fdb9ecb2 (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>
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