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Open Source and information security mailing list archives
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Date: Sat, 29 Aug 2020 08:02:30 +0100 From: Christoph Hellwig <hch@...radead.org> To: Arnd Bergmann <arnd@...db.de> Cc: Minchan Kim <minchan@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, LKML <linux-kernel@...r.kernel.org>, Christian Brauner <christian.brauner@...ntu.com>, linux-mm <linux-mm@...ck.org>, Linux API <linux-api@...r.kernel.org>, Oleksandr Natalenko <oleksandr@...hat.com>, Suren Baghdasaryan <surenb@...gle.com>, Tim Murray <timmurray@...gle.com>, Sandeep Patil <sspatil@...gle.com>, Sonny Rao <sonnyrao@...gle.com>, Brian Geffon <bgeffon@...gle.com>, Michal Hocko <mhocko@...e.com>, Johannes Weiner <hannes@...xchg.org>, Shakeel Butt <shakeelb@...gle.com>, John Dias <joaodias@...gle.com>, Joel Fernandes <joel@...lfernandes.org>, Jann Horn <jannh@...gle.com>, alexander.h.duyck@...ux.intel.com, SeongJae Park <sj38.park@...il.com>, David Rientjes <rientjes@...gle.com>, Arjun Roy <arjunroy@...gle.com>, Vlastimil Babka <vbabka@...e.cz>, Christian Brauner <christian@...uner.io>, Daniel Colascione <dancol@...gle.com>, Jens Axboe <axboe@...nel.dk>, Kirill Tkhai <ktkhai@...tuozzo.com>, SeongJae Park <sjpark@...zon.de>, linux-man <linux-man@...r.kernel.org> Subject: Re: [PATCH v8 3/4] mm/madvise: introduce process_madvise() syscall: an external memory hinting API On Fri, Aug 28, 2020 at 07:40:08PM +0200, Arnd Bergmann wrote: > Every syscall that passes an iovec seems to do this. If we make import_iovec() > handle both cases directly, this syscall and a number of others can > be simplified, and you avoid the x32 entry point I mentioned above FYI, I do have a series that does this (even tested) and kills tons of compat syscalls by that. But by doing that I found the problem that compat syscalls issued by io_uring don't trigger in_compat_syscall(). I need to go back to fixing the io_uring vs in_compat_syscall() issue (probably for 5.9) and then submit the whole thing.
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