From: sashiko-bot@kernel.org
To: "Qiliang Yuan" <odys.yuan@gmail.com>
Cc: linux-s390@vger.kernel.org, "Heiko Carstens" <hca@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>
Subject: Re: [PATCH 2/2] kasan/test: cover load_unaligned_zeropad()
Date: Mon, 19 Oct 2026 02:06:07 +0000 [thread overview]
Message-ID: <sashiko-outbox-176516@kernel.org> (raw)
In-Reply-To: <20261019-bug-word-at-a-time-zeropad-kasan-v1-2-f21a3ed6a477@gmail.com>
> On architectures with CONFIG_DCACHE_WORD_ACCESS, load_unaligned_zeropad()
> does the word loads of the dcache name compare and of path name
> hashing.
>
> None of the KASAN test cases reads memory through it, so nothing
> noticed that KASAN did not check these loads at all.
>
> Add a case that reads a freed object through load_unaligned_zeropad()
> and expects a report. Skip it with hardware tag-based KASAN, since
> arm64 turns tag checking off for this load:
>
> kasan_load_unaligned_zeropad, x86_64, generic KASAN
> without "word-at-a-time: check the first byte in
> load_unaligned_zeropad()" FAILED
> with it PASSED
>
> Signed-off-by: Qiliang Yuan <odys.yuan@gmail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261019-bug-word-at-a-time-zeropad-kasan-v1-0-f21a3ed6a477@gmail.com?part=2
next prev parent reply other threads:[~2026-10-19 2:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-19 1:58 [PATCH 0/2] word-at-a-time: let KASAN see load_unaligned_zeropad() Qiliang Yuan
2026-10-19 1:58 ` Qiliang Yuan
2026-10-19 1:58 ` [PATCH 1/2] word-at-a-time: check the first byte in load_unaligned_zeropad() Qiliang Yuan
2026-10-19 1:58 ` Qiliang Yuan
2026-10-19 2:06 ` sashiko-bot
2026-10-19 22:30 ` Marco Elver
2026-10-19 22:30 ` Marco Elver
2026-10-20 16:58 ` Andrey Ryabinin
2026-10-20 16:58 ` Andrey Ryabinin
2026-10-19 1:58 ` [PATCH 2/2] kasan/test: cover load_unaligned_zeropad() Qiliang Yuan
2026-10-19 1:58 ` Qiliang Yuan
2026-10-19 2:06 ` sashiko-bot [this message]
2026-10-20 17:05 ` Andrey Ryabinin
2026-10-20 17:05 ` Andrey Ryabinin
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