Messages in this thread | | | Date | Tue, 28 May 2019 17:23:27 -0700 (PDT) | Subject | Re: [PATCH v5 0/2] Fix issues with vmalloc flush flag | From | David Miller <> |
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From: Rick Edgecombe <rick.p.edgecombe@intel.com> 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.
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