Re: [PATCH 0/6] arm64: untag user pointers passed to the kernel

On Wed, Apr 25, 2018 at 04:45:37PM +0200, Andrey Konovalov wrote: > On Thu, Apr 19, 2018 at 11:33 AM, Kirill A. Shutemov > wrote: > > On Wed, Apr 18, 2018 at 08:53:09PM +0200, Andrey Konovalov wrote: > >> arm64 has a feature called Top Byte Ignore, which allows to embed pointer > >> tags into the

Re: [PATCH 0/6] arm64: untag user pointers passed to the kernel

On Thu, Apr 19, 2018 at 11:33 AM, Kirill A. Shutemov wrote: > On Wed, Apr 18, 2018 at 08:53:09PM +0200, Andrey Konovalov wrote: >> Hi! >> >> arm64 has a feature called Top Byte Ignore, which allows to embed pointer >> tags into the top byte of each pointer. Userspace programs (such as >> HWASan, a

Re: [PATCH 0/6] arm64: untag user pointers passed to the kernel

On Wed, Apr 18, 2018 at 08:53:09PM +0200, Andrey Konovalov wrote: > Hi! > > arm64 has a feature called Top Byte Ignore, which allows to embed pointer > tags into the top byte of each pointer. Userspace programs (such as > HWASan, a memory debugging tool [1]) might use this feature and pass > tagge

[PATCH 0/6] arm64: untag user pointers passed to the kernel

Hi! arm64 has a feature called Top Byte Ignore, which allows to embed pointer tags into the top byte of each pointer. Userspace programs (such as HWASan, a memory debugging tool [1]) might use this feature and pass tagged user pointers to the kernel through syscalls or other interfaces. This patc