From: Christoph Hellwig <hch@lst.de>
To: glider@google.com
Cc: Andrew Morton <akpm@linux-foundation.org>,
Jens Axboe <axboe@kernel.dk>, Theodore Ts'o <tytso@mit.edu>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Christoph Hellwig <hch@lst.de>,
Eric Dumazet <edumazet@google.com>,
Eric Van Hensbergen <ericvh@gmail.com>,
Takashi Iwai <tiwai@suse.com>,
Vegard Nossum <vegard.nossum@oracle.com>,
Dmitry Vyukov <dvyukov@google.com>,
linux-mm@kvack.org
Subject: Re: [PATCH RFC v1 23/26] kmsan: unpoisoning buffers from devices etc.
Date: Fri, 18 Oct 2019 17:27:09 +0200 [thread overview]
Message-ID: <20191018152709.GB32281@lst.de> (raw)
In-Reply-To: <20191018094304.37056-24-glider@google.com>
On Fri, Oct 18, 2019 at 11:43:01AM +0200, glider@google.com wrote:
> When data is copied to memory from a device KMSAN should treat it as
> initialized. In most cases it's enough to just unpoison the buffer that
> is known to come from a device.
> In the case with __do_page_cache_readahead() and bio_copy_user_iov() we
> have to mark the whole pages as ignored by KMSAN, as it's not obvious
> where these pages are read again.
I'm not sure how your annotations work because you only Cced me on this
one patch. Don't do that.
next prev parent reply other threads:[~2019-10-18 15:27 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-18 9:42 [PATCH RFC v1 00/26] Add KernelMemorySanitizer infrastructure glider
2019-10-18 9:42 ` [PATCH RFC v1 01/26] stackdepot: check depot_index before accessing the stack slab glider
2019-10-18 9:42 ` [PATCH RFC v1 02/26] stackdepot: prevent Clang from optimizing away stackdepot_memcmp() glider
2019-10-18 9:42 ` [PATCH RFC v1 03/26] kasan: stackdepot: move filter_irq_stacks() to stackdepot.c glider
2019-10-18 9:42 ` [PATCH RFC v1 04/26] stackdepot: reserve 5 extra bits in depot_stack_handle_t glider
2019-10-18 9:42 ` [PATCH RFC v1 05/26] printk_safe: externalize printk_context glider
2019-10-21 9:09 ` Petr Mladek
2019-10-23 17:57 ` Alexander Potapenko
2019-10-23 18:00 ` Alexander Potapenko
2019-10-24 12:46 ` Petr Mladek
2019-10-28 13:09 ` Alexander Potapenko
2019-10-29 12:02 ` Petr Mladek
2019-10-29 12:45 ` Alexander Potapenko
2019-10-18 9:42 ` [PATCH RFC v1 06/26] kasan: compiler.h: rename __no_kasan_or_inline into __no_memory_tool_or_inline glider
2019-10-18 9:42 ` [PATCH RFC v1 07/26] kmsan: add ReST documentation glider
2019-10-18 9:42 ` [PATCH RFC v1 08/26] kmsan: gfp: introduce __GFP_NO_KMSAN_SHADOW glider
2019-10-18 9:42 ` [PATCH RFC v1 09/26] kmsan: introduce __no_sanitize_memory and __SANITIZE_MEMORY__ glider
2019-10-18 9:42 ` [PATCH RFC v1 10/26] kmsan: reduce vmalloc space glider
2019-10-18 9:42 ` [PATCH RFC v1 11/26] kmsan: add KMSAN runtime glider
2019-10-18 9:42 ` [PATCH RFC v1 12/26] kmsan: x86: sync metadata pages on page fault glider
2019-10-18 9:42 ` [PATCH RFC v1 13/26] kmsan: add tests for KMSAN glider
2019-10-18 9:42 ` [PATCH RFC v1 14/26] kmsan: make READ_ONCE_TASK_STACK() return initialized values glider
2019-10-18 9:42 ` [PATCH RFC v1 15/26] kmsan: Kconfig changes to disable options incompatible with KMSAN glider
2019-10-21 14:11 ` Harry Wentland
2019-10-18 9:42 ` [PATCH RFC v1 16/26] kmsan: Changing existing files to enable KMSAN builds glider
2019-10-18 9:42 ` [PATCH RFC v1 17/26] kmsan: disable KMSAN instrumentation for certain kernel parts glider
2019-10-18 9:42 ` [PATCH RFC v1 18/26] kmsan: mm: call KMSAN hooks from SLUB code glider
2019-10-18 13:22 ` Qian Cai
2019-10-18 13:33 ` Alexander Potapenko
2019-10-18 13:41 ` Qian Cai
2019-10-18 13:55 ` Alexander Potapenko
2019-10-18 14:42 ` Qian Cai
2019-10-18 14:54 ` Alexander Potapenko
2019-10-18 15:13 ` Qian Cai
2019-10-18 15:30 ` Alexander Potapenko
2019-10-18 16:08 ` Qian Cai
2019-10-18 9:42 ` [PATCH RFC v1 19/26] kmsan: call KMSAN hooks where needed glider
2019-10-18 15:02 ` Qian Cai
2019-10-29 14:09 ` Alexander Potapenko
2019-10-29 14:56 ` Qian Cai
2019-10-21 9:25 ` Petr Mladek
2019-10-29 13:59 ` Alexander Potapenko
2019-10-18 9:42 ` [PATCH RFC v1 20/26] kmsan: disable instrumentation of certain functions glider
2019-10-18 9:42 ` [PATCH RFC v1 21/26] kmsan: unpoison |tlb| in arch_tlb_gather_mmu() glider
2019-10-18 9:43 ` [PATCH RFC v1 22/26] kmsan: use __msan_memcpy() where possible glider
2019-10-18 9:43 ` [PATCH RFC v1 23/26] kmsan: unpoisoning buffers from devices etc glider
2019-10-18 15:27 ` Christoph Hellwig [this message]
2019-10-18 16:22 ` Matthew Wilcox
2019-10-29 14:45 ` Alexander Potapenko
2019-10-30 12:43 ` Alexander Potapenko
2019-10-18 9:43 ` [PATCH RFC v1 24/26] kmsan: hooks for copy_to_user() and friends glider
2019-10-18 9:43 ` [PATCH RFC v1 25/26] kmsan: disable strscpy() optimization under KMSAN glider
2019-10-18 9:43 ` [PATCH RFC v1 26/26] net: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN glider
2019-10-19 3:20 ` Randy Dunlap
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