From: Catalin Marinas <catalin.marinas@arm.com>
To: Qian Cai <cai@lca.pw>
Cc: akpm@linux-foundation.org, elver@google.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH -next 1/2] mm: disable KCSAN for kmemleak
Date: Wed, 11 Mar 2020 14:18:48 +0000 [thread overview]
Message-ID: <20200311141848.GG3216816@arrakis.emea.arm.com> (raw)
In-Reply-To: <1583263716-25150-1-git-send-email-cai@lca.pw>
On Tue, Mar 03, 2020 at 02:28:35PM -0500, Qian Cai wrote:
> Kmemleak could scan task stacks while plain writes happens to those
> stack variables which could results in data races. For example, in
> sys_rt_sigaction and do_sigaction(), it could have plain writes in
> a 32-byte size. Since the kmemleak does not care about the actual values
> of a non-pointer and all do_sigaction() call sites only copy to stack
> variables, just disable KCSAN for kmemleak to avoid annotating anything
> outside Kmemleak just because Kmemleak scans everything.
>
> Suggested-by: Marco Elver <elver@google.com>
> Signed-off-by: Qian Cai <cai@lca.pw>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
prev parent reply other threads:[~2020-03-11 14:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-03 19:28 Qian Cai
2020-03-03 19:28 ` [PATCH -next 2/2] Revert "mm/kmemleak: annotate various data races obj->ptr" Qian Cai
2020-03-03 20:21 ` Marco Elver
2020-03-11 14:19 ` Catalin Marinas
2020-03-03 20:20 ` [PATCH -next 1/2] mm: disable KCSAN for kmemleak Marco Elver
2020-03-11 14:18 ` Catalin Marinas [this message]
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