[PATCH 4.4 35/45] virtio-console: avoid DMA from stack

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Omar Sandoval commit c4baad50297d84bde1a7ad45e50c73adae4a2192 upstream. put_chars() stuffs the buffer it gets into an sg, but that buffer may be on the stack. This breaks with

[PATCH 4.4 35/45] virtio-console: avoid DMA from stack

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Omar Sandoval commit c4baad50297d84bde1a7ad45e50c73adae4a2192 upstream. put_chars() stuffs the buffer it gets into an sg, but that buffer may be on the stack. This breaks with