From: Yu Zhao <yuzhao@google.com>
To: Purva Yeshi <purvayeshi550@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/vmscan: Initialize dirty to prevent uninitialized use
Date: Tue, 25 Mar 2025 14:35:53 -0600 [thread overview]
Message-ID: <CAOUHufaFz=G+0o5c+u9YY-4n1KExS6_tOFATY1TMyWWcrAQ8Ng@mail.gmail.com> (raw)
In-Reply-To: <20250325194920.53307-1-purvayeshi550@gmail.com>
On Tue, Mar 25, 2025 at 1:49 PM Purva Yeshi <purvayeshi550@gmail.com> wrote:
>
> Fix Smatch-detected error:
> mm/vmscan.c:3509 walk_pte_range() error: uninitialized symbol 'dirty'.
> mm/vmscan.c:3522 walk_pte_range() error: uninitialized symbol 'dirty'.
> mm/vmscan.c:3600 walk_pmd_range_locked() error: uninitialized symbol 'dirty'.
> mm/vmscan.c:3614 walk_pmd_range_locked() error: uninitialized symbol 'dirty'.
> mm/vmscan.c:4220 lru_gen_look_around() error: uninitialized symbol 'dirty'.
> mm/vmscan.c:4232 lru_gen_look_around() error: uninitialized symbol 'dirty'.
>
> Smatch reports 'dirty' as uninitialized, leading to potential
> undefined behavior.
Thanks -- this seems like false positives from Smatch, where the
problem should be fixed.
> Explicitly initialize dirty to 0 in walk_pte_range(),
> walk_pmd_range_locked(), and lru_gen_look_around() in mm/vmscan.c
> to fix Smatch error.
>
> Signed-off-by: Purva Yeshi <purvayeshi550@gmail.com>
next prev parent reply other threads:[~2025-03-25 20:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-25 19:49 Purva Yeshi
2025-03-25 20:35 ` Yu Zhao [this message]
2025-03-26 6:48 ` Purva Yeshi
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