From: David Howells <dhowells@redhat.com>
To: asmadeus@codewreck.org
Cc: dhowells@redhat.com,
syzbot <syzbot+df038d463cca332e8414@syzkaller.appspotmail.com>,
ericvh@kernel.org, linux-kernel@vger.kernel.org,
linux_oss@crudebyte.com, lucho@ionkov.net,
syzkaller-bugs@googlegroups.com, v9fs@lists.linux.dev
Subject: Re: [syzbot] [v9fs?] KASAN: slab-use-after-free Write in v9fs_free_request
Date: Wed, 22 May 2024 11:56:52 +0100 [thread overview]
Message-ID: <371419.1716375412@warthog.procyon.org.uk> (raw)
In-Reply-To: <Zkr8i9XxpkJ9AABZ@codewreck.org>
asmadeus@codewreck.org wrote:
> That's a tough one: netfs took a ref in v9fs_init_request (netfs op's
> init_request) and expects to be able to use it until v9fs_free_request
> (net op's free_request()), but the fs was dismounted first and we kill
> the kmem cache at this point so we aggressively drop any dangling ref
> there as there's no way of waiting.
Which kmem cache are we talking about? I can see two in net/9p/ and one in
fs/9p/. And took a ref on what?
David
next prev parent reply other threads:[~2024-05-22 10:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-12 19:42 [syzbot] [v9fs?] KASAN: slab-use-after-free Write in v9fs_free_request syzbot
2024-05-20 7:32 ` asmadeus
2024-05-21 14:24 ` David Howells
2024-05-22 10:56 ` David Howells [this message]
2024-05-22 21:09 ` David Howells
2024-05-22 21:09 ` syzbot
-- strict thread matches above, loose matches on Subject: below --
2024-05-13 11:50 lee bruce
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