From: Linus Torvalds <torvalds@linux-foundation.org>
To: syzbot <syzbot+3f1ca6a6fec34d601788@syzkaller.appspotmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>,
ath9k-devel@qca.qualcomm.com, chouhan.shreyansh630@gmail.com,
David Miller <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Kalle Valo <kvalo@codeaurora.org>,
Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"open list:USB GADGET/PERIPHERAL SUBSYSTEM"
<linux-usb@vger.kernel.org>,
linux-wireless <linux-wireless@vger.kernel.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Michal Marek <michal.lkml@markovi.net>,
Nick Desaulniers <ndesaulniers@google.com>,
Netdev <netdev@vger.kernel.org>,
syzkaller-bugs <syzkaller-bugs@googlegroups.com>
Subject: Re: [syzbot] KASAN: out-of-bounds Read in ath9k_hif_usb_rx_cb (3)
Date: Tue, 15 Mar 2022 10:08:36 -0700 [thread overview]
Message-ID: <CAHk-=wj4HBk7o8_dbpk=YiTOFxvE9LTiH8Gk=1kgVxOq1jaH7g@mail.gmail.com> (raw)
In-Reply-To: <00000000000003887a05da3e872c@google.com>
On Tue, Mar 15, 2022 at 2:36 AM syzbot
<syzbot+3f1ca6a6fec34d601788@syzkaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit
> 09688c0166e7 ("Linux 5.17-rc8")
No, I'm afraid that means that the bisection is broken:
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=140283ad700000
and yeah, looking at that log it looks like every single run has
testing commit [...]
run #0: crashed: KASAN: use-after-free Read in ath9k_hif_usb_rx_cb
...
# git bisect good [...]
and you never saw a "bad" commit that didn't have the issue, so the
top-of-tree gets marked "good" (and I suspect you intentionally mark
the broken case "good" in order to find where it got fixed, so you're
using "git bisect" in a reverse way).
I didn't look closer, but it does seem to not reproduce very reliably,
maybe that is what confused the bot originally.
Linus
next prev parent reply other threads:[~2022-03-15 17:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-05 16:03 KASAN: out-of-bounds Read in ath9k_hif_usb_rx_cb (3) syzbot
2021-06-06 21:16 ` [syzbot] " syzbot
2022-03-15 9:36 ` syzbot
2022-03-15 17:08 ` Linus Torvalds [this message]
2022-03-16 7:45 ` Dmitry Vyukov
2022-03-16 16:01 ` Linus Torvalds
[not found] <20220317111127.2117-1-hdanton@sina.com>
2022-03-17 11:11 ` syzbot
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