linux-kernel - Re: [syzbot] KASAN: use-after-free Read in post_one

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Message-ID: <1826222d84f.7e796357131272.8568477361906857088@siddh.me>
Date:   Wed, 03 Aug 2022 10:47:07 +0530
From:   Siddh Raman Pant <code@...dh.me>
To:     "Eric Biggers" <ebiggers@...nel.org>
Cc:     "syzbot" <syzbot+c70d87ac1d001f29a058@...kaller.appspotmail.com>,
        "hdanton" <hdanton@...a.com>,
        "linux-kernel" <linux-kernel@...r.kernel.org>,
        "syzkaller-bugs" <syzkaller-bugs@...glegroups.com>
Subject: Re: [syzbot] KASAN: use-after-free Read in post_one_notification

On Wed, 03 Aug 2022 09:39:34 +0530  Eric Biggers <ebiggers@...nel.org> wrote:
 > I don't think that's true; the pointer doesn't get dereferenced after
 > watch_queue::defunct is set.  See my message on the other thread where I
 > explained this: https://lore.kernel.org/lkml/YunKlJCDlmyn2hJ4@sol.localdomain
 > 
 > Of course, if you actually have a reproducer, or a KASAN report, or anything at
 > all that shows there is still a problem, then please post it.
 > 
 > - Eric

Replying to the other thread.

Thanks,
Siddh