From: Christoph Hellwig <hch@lst.de>
To: Alexander Potapenko <glider@google.com>
Cc: Christoph Hellwig <hch@lst.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Robin Murphy <robin.murphy@arm.com>,
Vegard Nossum <vegard.nossum@oracle.com>,
Dmitry Vyukov <dvyukov@google.com>,
Marco Elver <elver@google.com>,
Andrey Konovalov <andreyknvl@google.com>,
Linux Memory Management List <linux-mm@kvack.org>,
Al Viro <viro@zeniv.linux.org.uk>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Andrew Morton <akpm@linux-foundation.org>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Andy Lutomirski <luto@kernel.org>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
Christoph Hellwig <hch@infradead.org>,
"Darrick J. Wong" <darrick.wong@oracle.com>,
David Miller <davem@davemloft.net>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
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Eric Dumazet <edumazet@google.com>,
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Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Harry Wentland <harry.wentland@amd.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
Ilya Leoshkevich <iii@linux.ibm.com>, Ingo Molnar <mingo@elte.hu>,
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"Martin K . Petersen" <martin.petersen@oracle.com>,
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Matthew Wilcox <willy@infradead.org>,
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Michal Hocko <mhocko@suse.com>, Michal Simek <monstr@monstr.eu>,
Petr Mladek <pmladek@suse.com>, Qian Cai <cai@lca.pw>,
Randy Dunlap <rdunlap@infradead.org>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Takashi Iwai <tiwai@suse.com>, Theodore Ts'o <tytso@mit.edu>,
Thomas Gleixner <tglx@linutronix.de>,
Vasily Gorbik <gor@linux.ibm.com>,
Wolfram Sang <wsa@the-dreams.de>
Subject: Re: [PATCH v5 34/38] kmsan: dma: unpoison memory mapped by dma_direct_map_page()
Date: Fri, 27 Mar 2020 18:06:47 +0100 [thread overview]
Message-ID: <20200327170647.GA22758@lst.de> (raw)
In-Reply-To: <CAG_fn=WjuC+uRyc4ocQ9YLOkZtLY8a+EnNZiVG5SsvczJBunLw@mail.gmail.com>
On Fri, Mar 27, 2020 at 06:03:32PM +0100, Alexander Potapenko wrote:
> > Also the page
> > doesn't have to be mapped into kernel address space, you probably
> > want to pass the page to kmsan_handle_dma and throw in a highmem
> > check there.
>
> Do you mean comparing the address to TASK_SIZE, or is there a more
> portable way to check that?
!PageHighMem(page) implies the page has a kernel direct mapping.
next prev parent reply other threads:[~2020-03-27 17:06 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-25 16:12 [PATCH v5 00/38] Add KernelMemorySanitizer infrastructure glider
2020-03-25 16:12 ` [PATCH v5 01/38] stackdepot: reserve 5 extra bits in depot_stack_handle_t glider
2020-03-30 13:36 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 02/38] kmsan: add ReST documentation glider
2020-03-30 14:32 ` Andrey Konovalov
2020-04-13 14:45 ` Alexander Potapenko
2020-03-25 16:12 ` [PATCH v5 03/38] kmsan: gfp: introduce __GFP_NO_KMSAN_SHADOW glider
2020-03-25 16:19 ` Michal Hocko
2020-03-25 17:26 ` Alexander Potapenko
2020-03-25 17:40 ` Alexander Potapenko
2020-03-25 17:49 ` Matthew Wilcox
2020-03-25 18:03 ` Alexander Potapenko
2020-03-25 18:09 ` Matthew Wilcox
2020-03-25 18:30 ` Alexander Potapenko
2020-03-25 18:43 ` Michal Hocko
2020-03-25 18:40 ` Michal Hocko
2020-03-25 18:38 ` Michal Hocko
2020-03-27 12:20 ` Alexander Potapenko
2020-04-25 9:45 ` Alexander Potapenko
2020-03-25 17:43 ` Michal Hocko
2020-03-25 16:12 ` [PATCH v5 04/38] kmsan: introduce __no_sanitize_memory and __SANITIZE_MEMORY__ glider
2020-03-30 13:37 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 05/38] kmsan: reduce vmalloc space glider
2020-03-30 13:48 ` Andrey Konovalov
2020-04-14 14:21 ` Alexander Potapenko
2020-04-23 19:14 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 06/38] kmsan: add KMSAN runtime core glider
2020-03-25 16:12 ` [PATCH v5 07/38] kmsan: KMSAN compiler API implementation glider
2020-03-25 16:12 ` [PATCH v5 08/38] kmsan: add KMSAN hooks for kernel subsystems glider
2020-03-25 16:12 ` [PATCH v5 09/38] kmsan: stackdepot: don't allocate KMSAN metadata for stackdepot glider
2020-04-23 19:22 ` Andrey Konovalov
2020-04-25 9:46 ` Alexander Potapenko
2020-03-25 16:12 ` [PATCH v5 10/38] kmsan: define READ_ONCE_NOCHECK() glider
2020-04-23 19:20 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 11/38] kmsan: make READ_ONCE_TASK_STACK() return initialized values glider
2020-04-23 19:15 ` Andrey Konovalov
2020-04-23 19:18 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 12/38] kmsan: x86: sync metadata pages on page fault glider
2020-04-23 19:15 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 13/38] kmsan: add tests for KMSAN glider
2020-04-23 19:02 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 14/38] crypto: kmsan: disable accelerated configs under KMSAN glider
2020-04-23 18:50 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 15/38] kmsan: x86: disable UNWINDER_ORC " glider
2020-04-14 17:52 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 16/38] kmsan: x86/asm: softirq: add KMSAN IRQ entry hooks glider
2020-04-14 17:54 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 17/38] kmsan: disable KMSAN instrumentation for certain kernel parts glider
2020-04-14 17:56 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 18/38] kmsan: mm: call KMSAN hooks from SLUB code glider
2020-03-25 16:12 ` [PATCH v5 19/38] kmsan: mm: maintain KMSAN metadata for page operations glider
2020-03-25 16:12 ` [PATCH v5 20/38] kmsan: handle memory sent to/from USB glider
2020-04-14 14:46 ` Andrey Konovalov
2020-04-14 15:50 ` Alan Stern
2020-04-14 17:48 ` Andrey Konovalov
2020-04-14 20:45 ` Alan Stern
2020-04-27 13:59 ` Alexander Potapenko
2020-03-25 16:12 ` [PATCH v5 21/38] kmsan: handle task creation and exiting glider
2020-03-25 16:12 ` [PATCH v5 22/38] kmsan: net: check the value of skb before sending it to the network glider
2020-04-27 14:02 ` Alexander Potapenko
2020-03-25 16:12 ` [PATCH v5 23/38] kmsan: printk: treat the result of vscnprintf() as initialized glider
2020-04-14 14:37 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 24/38] kmsan: disable instrumentation of certain functions glider
2020-04-14 15:04 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 25/38] kmsan: unpoison |tlb| in arch_tlb_gather_mmu() glider
2020-04-08 16:07 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 26/38] kmsan: use __msan_ string functions where possible glider
2020-03-25 16:12 ` [PATCH v5 27/38] kmsan: hooks for copy_to_user() and friends glider
2020-03-25 16:12 ` [PATCH v5 28/38] kmsan: init: call KMSAN initialization routines glider
2020-04-08 16:04 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 29/38] kmsan: enable KMSAN builds glider
2020-04-14 14:56 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 30/38] kmsan: handle /dev/[u]random glider
2020-04-08 16:03 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 31/38] kmsan: virtio: check/unpoison scatterlist in vring_map_one_sg() glider
2020-03-25 16:12 ` [PATCH v5 32/38] kmsan: disable strscpy() optimization under KMSAN glider
2020-04-08 16:00 ` Andrey Konovalov
2020-04-13 14:19 ` Alexander Potapenko
2020-04-13 15:32 ` Steven Rostedt
2020-04-13 16:16 ` Alexander Potapenko
2020-03-25 16:12 ` [PATCH v5 33/38] kmsan: add iomap support glider
2020-04-08 15:57 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 34/38] kmsan: dma: unpoison memory mapped by dma_direct_map_page() glider
2020-03-25 16:19 ` Christoph Hellwig
2020-03-27 17:03 ` Alexander Potapenko
2020-03-27 17:06 ` Christoph Hellwig [this message]
2020-03-27 18:46 ` Alexander Potapenko
2020-03-28 8:52 ` Christoph Hellwig
2020-04-14 15:26 ` Alexander Potapenko
2020-03-25 16:12 ` [PATCH v5 35/38] kmsan: disable physical page merging in biovec glider
2020-03-25 16:12 ` [PATCH v5 36/38] x86: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN glider
2020-04-08 15:53 ` Andrey Konovalov
2020-03-25 16:12 ` [PATCH v5 37/38] kmsan: x86/uprobes: unpoison regs in arch_uprobe_exception_notify() glider
2020-03-25 16:12 ` [PATCH v5 38/38] kmsan: block: skip bio block merging logic for KMSAN glider
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