[PATCH 4.11 01/28] dm ioctl: prevent stack leak in dm ioctl call

4.11-stable review patch. If anyone has any objections, please let me know. -- From: Adrian Salido commit 4617f564c06117c7d1b611be49521a4430042287 upstream. When calling a dm ioctl that doesn't process any data (IOCTL_FLAGS_NO_PARAMS), the contents of the

[PATCH 4.11 01/28] dm ioctl: prevent stack leak in dm ioctl call

4.11-stable review patch. If anyone has any objections, please let me know. -- From: Adrian Salido commit 4617f564c06117c7d1b611be49521a4430042287 upstream. When calling a dm ioctl that doesn't process any data (IOCTL_FLAGS_NO_PARAMS), the contents of the data field in struct