From: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx> Date: Mon, 27 May 2019 14:10:56 -0700 > These two patches address issues with the recently added > VM_FLUSH_RESET_PERMS vmalloc flag. > > Patch 1 addresses an issue that could cause a crash after other > architectures besides x86 rely on this path. > > Patch 2 addresses an issue where in a rare case strange arguments > could be provided to flush_tlb_kernel_range(). It just occurred to me another situation that would cause trouble on sparc64, and that's if someone the address range of the main kernel image ended up being passed to flush_tlb_kernel_range(). That would flush the locked kernel mapping and crash the kernel instantly in a completely non-recoverable way.
