From: Matheus Alves de Almeida <matheus.aalmeida@inf.ufrgs.br>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
syzbot+5585f47221c0de04168d@syzkaller.appspotmail.com
Subject: Re: [PATCH] ufs: validate block and fragment shifts
Date: Thu, 08 Oct 2026 00:27:26 -0300 [thread overview]
Message-ID: <fd6fe797394ecb5d64439cb87611e730@inf.ufrgs.br> (raw)
In-Reply-To: <20260925043337.87879-1-matheus.aalmeida@inf.ufrgs.br>
Em 2026-09-25 01:33, Matheus Alves de Almeida escreveu:
> Currently, ufs_fill_super() accepts images with an fs_bshift and an
> fs_fshift that do not match their respective size fields. This causes
> UBSAN shift-out-of-bounds issues in the bad fs_bshift case and an
> out-of-bounds read and kernel oops in the bad fs_fshift case.
>
> Make the ufs_fill_super() function check that these fields agree with
> their size counterparts.
>
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Reported-by: syzbot+5585f47221c0de04168d@syzkaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=5585f47221c0de04168d
> Cc: stable@vger.kernel.org
> Signed-off-by: Matheus Alves de Almeida <matheus.aalmeida@inf.ufrgs.br>
Hi,
Gentle ping on this. Has anyone been able to take a look at it yet?
Matheus
prev parent reply other threads:[~2026-10-08 3:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-25 4:33 Matheus Alves de Almeida
2026-10-08 3:27 ` Matheus Alves de Almeida [this message]
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