Vulnerability details

In the Linux kernel, the following vulnerability has been resolved: media: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity rockchip_vpu981_av1_dec_set_tile_info() indexes the tile group entry array by tile1 * tile_cols + tile0, reading up to tile_cols * tile_rows entries, lays out one descriptor per tile in the AV1_MAX_TILES tile_info buffer, and programs the real tile_cols / tile_rows into the hardware. The tile group entry control is a dynamic array sized to the number of entries userspace submitted, independent of tile_cols / tile_rows, so a frame that claims more tiles than entries reads past the array. A frame that claims more than AV1_MAX_TILES tiles also leaves the hardware programmed for more tiles than the descriptor buffer holds. Reject both in prepare_run(): tile_cols * tile_rows must not exceed the submitted entry count or AV1_MAX_TILES. The entry count is read via v4l2_ctrl_find() (ctrl->elems). This mirrors the bound the mediatek AV1 decoder already enforces.

• https://git.kernel.org/stable/c/95ee48eb17c91bd4859b65e0a54e7722f370d0e5
• https://git.kernel.org/stable/c/40029f7f35397853f8711d6fce1d90a4c7a01f8c
• https://git.kernel.org/stable/c/a41babf528f70c9a82ed31cfb5fe19065910f7f0
• https://git.kernel.org/stable/c/fd965369220cc160bb20a24991790814bfbab401
• https://git.kernel.org/stable/c/367db8b23c26a913d76ed70457bbcd781c422b49