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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-05-15 20:38:55 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-05-18 14:45:29 +0300
commit2a103ba17ef2984dd59a31c1138414c4e0177cb0 (patch)
tree137185d7034cf25d88156626b9c33c30df856706 /LICENSES/Linux-syscall-note.txt
parentd189248302340909407f40a880af8a181dfd6203 (diff)
android: camera_metadata: Add type sanity check to updateEntry()
The CameraMetadata::updateEntry() functions cast the data pointer to a void pointer, which is then used internally to call update_camera_metadata_entry(). If the caller passes a pointer to an incorrect data type, the behaviour is undefined, with possible crashes if the incorrect data type is smaller than expected by the Android metadata library. To avoid crashes, make all public updateEntry() functions take typed pointers, and pass the element size to the internal function. The element size is then checked against the expected size, and an error message logged if they don't match. This won't catch incorrect data types that have the same size as the correct type, but will at least avoid potential crashes. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Tested-by: Paul Elder <paul.elder@ideasonboard.com>
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