Re: BUG: using smp_processor_id() in preemptible code in radix_tree_node_alloc

[syzbot]

syzbot has bisected this bug to:

commit e42671084361302141a09284fde9bbc14fdd16bf
Author: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Date:   Thu May 7 12:53:06 2020 +0000

    net: qrtr: Do not depend on ARCH_QCOM

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17e22212100000
start commit:   acf25aa6 Merge tag 'Smack-for-5.8' of git://github.com/csc..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=14122212100000
console output: https://syzkaller.appspot.com/x/log.txt?x=10122212100000
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

Reported-by: syzbot+3eec59e770685e3dc879@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: e42671084361 ("net: qrtr: Do not depend on ARCH_QCOM")

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