linux-kernel - Re: [syzbot] BUG: using smp_processor_id() in preemptible code in radix_tree_node

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Message-ID: <YL5QQE2GnJFWI4rB@casper.infradead.org>
Date:   Mon, 7 Jun 2021 17:58:40 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     syzbot <syzbot+3eec59e770685e3dc879@...kaller.appspotmail.com>
Cc:     bjorn.andersson@...aro.org, brookebasile@...il.com,
        coreteam@...filter.org, davem@...emloft.net, dsahern@...nel.org,
        ducheng2@...il.com, ebiggers@...nel.org, fw@...len.de,
        gregkh@...uxfoundation.org, kadlec@...filter.org, kuba@...nel.org,
        linux-kernel@...r.kernel.org, manivannan.sadhasivam@...aro.org,
        netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
        pablo@...filter.org, skhan@...uxfoundation.org,
        syzkaller-bugs@...glegroups.com, yoshfuji@...ux-ipv6.org
Subject: Re: [syzbot] BUG: using smp_processor_id() in preemptible code in
 radix_tree_node_alloc

On Mon, Jun 07, 2021 at 09:47:07AM -0700, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit 43016d02cf6e46edfc4696452251d34bba0c0435
> Author: Florian Westphal <fw@...len.de>
> Date:   Mon May 3 11:51:15 2021 +0000
> 
>     netfilter: arptables: use pernet ops struct during unregister

Same wrong bisection.

#syz fix: qrtr: Convert qrtr_ports from IDR to XArray