From: Sasha Levin <sashal@kernel.org>
To: Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
kasan-dev@googlegroups.com, Ard Biesheuvel <ardb@kernel.org>,
Florian Fainelli <f.fainelli@gmail.com>,
Russell King - ARM Linux <rmk+kernel@armlinux.org.uk>,
Abbott Liu <liuwenliang@huawei.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH AUTOSEL 5.10 01/31] ARM: 9014/2: Replace string mem* functions for KASan
Date: Mon, 4 Jan 2021 09:29:01 -0500 [thread overview]
Message-ID: <20210104142901.GC3665355@sasha-vm> (raw)
In-Reply-To: <25b25571-41d6-9482-4c65-09fe88b200d5@pengutronix.de>
On Wed, Dec 30, 2020 at 03:18:13PM +0100, Ahmad Fatoum wrote:
>Hello Sasha,
>
>On 30.12.20 14:02, Sasha Levin wrote:
>> From: Linus Walleij <linus.walleij@linaro.org>
>>
>> [ Upstream commit d6d51a96c7d63b7450860a3037f2d62388286a52 ]
>>
>> Functions like memset()/memmove()/memcpy() do a lot of memory
>> accesses.
>>
>> If a bad pointer is passed to one of these functions it is important
>> to catch this. Compiler instrumentation cannot do this since these
>> functions are written in assembly.
>>
>> KASan replaces these memory functions with instrumented variants.
>
>Unless someone actually wants this, I suggest dropping it.
>
>It's a prerequisite patch for KASan support on ARM32, which is new in
>v5.11-rc1. Backporting it on its own doesn't add any value IMO.
I'll drop it, thanks.
--
Thanks,
Sasha
prev parent reply other threads:[~2021-01-04 14:29 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-30 13:02 [PATCH AUTOSEL 5.10 01/31] ARM: 9014/2: Replace string mem* functions for KASan Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 02/31] rtc: sun6i: Fix memleak in sun6i_rtc_clk_init Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 03/31] module: set MODULE_STATE_GOING state when a module fails to load Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 04/31] quota: Don't overflow quota file offsets Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 05/31] rtc: pl031: fix resource leak in pl031_probe Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 06/31] powerpc: sysdev: add missing iounmap() on error in mpic_msgr_probe() Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 07/31] i3c master: fix missing destroy_workqueue() on error in i3c_master_register Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 08/31] reiserfs: add check for an invalid ih_entry_count Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 09/31] NFSv4: Fix a pNFS layout related use-after-free race when freeing the inode Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 10/31] f2fs: Handle casefolding with Encryption Sasha Levin
2020-12-30 18:01 ` [f2fs-dev] " Eric Biggers
2021-01-04 14:20 ` Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 11/31] f2fs: avoid race condition for shrinker count Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 12/31] f2fs: fix race of pending_pages in decompression Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 13/31] module: delay kobject uevent until after module init call Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 14/31] powerpc/64: irq replay remove decrementer overflow check Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 15/31] f2fs: fix shift-out-of-bounds in sanity_check_raw_super() Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 16/31] fs/namespace.c: WARN if mnt_count has become negative Sasha Levin
2020-12-30 13:02 ` [PATCH AUTOSEL 5.10 17/31] watchdog: rti-wdt: fix reference leak in rti_wdt_probe Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 18/31] um: random: Register random as hwrng-core device Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 19/31] um: ubd: Submit all data segments atomically Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 20/31] um: allocate a guard page to helper threads Sasha Levin
2020-12-30 14:48 ` Johannes Berg
2021-01-04 14:21 ` Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 21/31] NFSv4.2: Don't error when exiting early on a READ_PLUS buffer overflow Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 22/31] ceph: fix inode refcount leak when ceph_fill_inode on non-I_NEW inode fails Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 23/31] drm/amd/display: updated wm table for Renoir Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 24/31] tick/sched: Remove bogus boot "safety" check Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 25/31] s390: always clear kernel stack backchain before calling functions Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 26/31] io_uring: remove racy overflow list fast checks Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 27/31] ext4: check for invalid block size early when mounting a file system Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 28/31] ALSA: pcm: Clear the full allocated memory at hw_params Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 29/31] dm verity: skip verity work if I/O error when system is shutting down Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 30/31] ext4: avoid s_mb_prefetch to be zero in individual scenarios Sasha Levin
2020-12-30 13:03 ` [PATCH AUTOSEL 5.10 31/31] device-dax: Fix range release Sasha Levin
2020-12-30 14:18 ` [PATCH AUTOSEL 5.10 01/31] ARM: 9014/2: Replace string mem* functions for KASan Ahmad Fatoum
2021-01-04 14:29 ` Sasha Levin [this message]
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