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From: Jakub Kicinski <>
To: YueHaibing <>
Cc: <>, <>,
	<>, Jiri Pirko <>
Subject: Re: [PATCH] netdevsim: Fix error handling in nsim_fib_init and nsim_fib_exit
Date: Sat, 12 Oct 2019 15:31:56 -0700
Message-ID: <> (raw)
In-Reply-To: <>

On Fri, 11 Oct 2019 17:46:53 +0800, YueHaibing wrote:
> In nsim_fib_init(), if register_fib_notifier failed, nsim_fib_net_ops
> should be unregistered before return.
> In nsim_fib_exit(), unregister_fib_notifier should be called before
> nsim_fib_net_ops be unregistered, otherwise may cause use-after-free:
> BUG: KASAN: use-after-free in nsim_fib_event_nb+0x342/0x570 [netdevsim]
> Read of size 8 at addr ffff8881daaf4388 by task kworker/0:3/3499

> Reported-by: Hulk Robot <>
> Fixes: 59c84b9fcf42 ("netdevsim: Restore per-network namespace accounting for fib entries")
> Signed-off-by: YueHaibing <>

Acked-by: Jakub Kicinski <>

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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-11  9:46 YueHaibing
2019-10-12 22:31 ` Jakub Kicinski [this message]
2019-10-13 21:15 ` David Miller

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