Hi, This patch series introduces safety checks in virtio-blk and virtio-fs drivers to ensure proper handling of device-writable buffer lengths as specified by the virtio specification. The virtio specification states: "The driver MUST NOT make assumptions about data in device-writable buffers beyond the first len bytes, and SHOULD ignore this data." To align with this requirement, we introduce checks in both drivers to verify that the length of data written by the device is at least as large as the expected/needed payload. If this condition is not met, we set an I/O error status to prevent processing of potentially invalid or incomplete data. These changes improve the robustness of the drivers and ensure better compliance with the virtio specification. Max Gurtovoy (2): virtio_blk: add length check for device writable portion virtio_fs: add length check for device writable portion drivers/block/virtio_blk.c | 20 ++++++++++++++++++++ fs/fuse/virtio_fs.c | 9 +++++++++ 2 files changed, 29 insertions(+) -- 2.18.1
