From: "Fabio M. De Francesco" <fmdefrancesco@gmail.com>
To: syzbot <syzbot+d55757faa9b80590767b@syzkaller.appspotmail.com>,
syzkaller-bugs@googlegroups.com,
David Howells <dhowells@redhat.com>
Cc: dhowells@redhat.com, christophe.jaillet@wanadoo.fr,
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] KASAN: null-ptr-deref Read in __free_pages
Date: Mon, 21 Mar 2022 09:43:58 +0100 [thread overview]
Message-ID: <2113719.Icojqenx9y@leap> (raw)
In-Reply-To: <970502.1647851062@warthog.procyon.org.uk>
On lunedì 21 marzo 2022 09:24:22 CET David Howells wrote:
> It should be possible to just test for the pointer being NULL in the loop
> before calling __free_pages() since the list was allocated with kcalloc().
>
> David
>
> #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git 6d39b096627f0a1eb6e14f049d8ae3c93e0290f2
>
> --
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>
Hello David,
I had already sent a patch for this problem:
https://lore.kernel.org/lkml/20220321014246.19941-1-fmdefrancesco@gmail.com/
However, I see that you ignored mine and preferred yours. I would have appreciated
to have your review of my patch or to discuss the pros and cons of yours vs. my
solution and be CC'ed in this thread because I've spent some time on it :)
Best regards,
Fabio M. De Francesco
next prev parent reply other threads:[~2022-03-21 8:44 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-20 22:04 [syzbot] KASAN: null-ptr-deref Read in __free_pages syzbot
2022-03-20 23:32 ` Fabio M. De Francesco
2022-03-20 23:38 ` syzbot
2022-03-20 23:40 ` Fabio M. De Francesco
2022-03-20 23:50 ` syzbot
2022-03-21 0:28 ` Fabio M. De Francesco
2022-03-21 0:37 ` syzbot
2022-03-21 8:46 ` David Howells
2022-03-21 9:02 ` Fabio M. De Francesco
2022-03-21 9:37 ` David Howells
2022-03-21 8:24 ` David Howells
2022-03-21 8:34 ` syzbot
2022-03-21 8:43 ` Fabio M. De Francesco [this message]
2022-03-21 8:50 ` Fabio M. De Francesco
2022-03-21 11:19 ` David Howells
2022-03-21 11:30 ` syzbot
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