From: Thomas Gleixner <tglx@linutronix.de>
To: paulmck@kernel.org
Cc: syzbot <syzbot+f2ceae48bb0c0ab08b9d@syzkaller.appspotmail.com>,
bp@alien8.de, dwmw@amazon.co.uk, hpa@zytor.com,
linux-kernel@vger.kernel.org, mingo@redhat.com,
syzkaller-bugs@googlegroups.com, x86@kernel.org
Subject: Re: [syzbot] WARNING in rcu_core
Date: Mon, 30 Aug 2021 21:39:54 +0200 [thread overview]
Message-ID: <875yvmhgc5.ffs@tglx> (raw)
In-Reply-To: <20210830170647.GT4156@paulmck-ThinkPad-P17-Gen-1>
On Mon, Aug 30 2021 at 10:06, Paul E. McKenney wrote:
> On Mon, Aug 30, 2021 at 12:51:39PM +0200, Thomas Gleixner wrote:
>
> This looks like a use-after-free in a structure that unions the rcu_head
> structure with something else.
>
> Would adding a mem_dump_obj() somewhere in the debug-object code be
> helpful?
At least for the case where the object is not available in the debug
objects tracking.
> (Or propagate a return value out, similar to that of
> debug_object_activate()?)
That might be useful for some callers as well.
Thanks,
tglx
prev parent reply other threads:[~2021-08-30 19:39 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-30 9:45 [syzbot] WARNING in rcu_core syzbot
2021-08-30 10:51 ` Thomas Gleixner
2021-08-30 17:06 ` Paul E. McKenney
2021-08-30 19:39 ` Thomas Gleixner [this message]
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