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

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Date:   Mon, 07 Jun 2021 09:47:07 -0700
From:   syzbot <syzbot+3eec59e770685e3dc879@...kaller.appspotmail.com>
To:     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, willy@...radead.org,
        yoshfuji@...ux-ipv6.org
Subject: Re: [syzbot] BUG: using smp_processor_id() in preemptible code in radix_tree_node_alloc

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

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12dfdf47d00000
start commit:   acf25aa6 Merge tag 'Smack-for-5.8' of git://github.com/csc..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=5263d9b5bce03c67
dashboard link: https://syzkaller.appspot.com/bug?extid=3eec59e770685e3dc879
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15bd4c1e100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1520c9de100000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: netfilter: arptables: use pernet ops struct during unregister

For information about bisection process see: https://goo.gl/tpsmEJ#bisection