linux-kernel - Re: [PATCH] net: qrtr: ns: Protect radix_tree_deref

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Message-Id: <20200928.155603.134441435973191115.davem@davemloft.net>
Date:   Mon, 28 Sep 2020 15:56:03 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     manivannan.sadhasivam@...aro.org
Cc:     kuba@...nel.org, bjorn.andersson@...aro.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        sboyd@...nel.org
Subject: Re: [PATCH] net: qrtr: ns: Protect radix_tree_deref_slot() using
 rcu read locks

From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Date: Sat, 26 Sep 2020 22:26:25 +0530

> The rcu read locks are needed to avoid potential race condition while
> dereferencing radix tree from multiple threads. The issue was identified
> by syzbot. Below is the crash report:
 ...
> Fixes: 0c2204a4ad71 ("net: qrtr: Migrate nameservice to kernel from userspace")
> Reported-and-tested-by: syzbot+0f84f6eed90503da72fc@...kaller.appspotmail.com
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Applied and queued up for -stable, thank you.