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SubjectRe: [syzbot] possible deadlock in blkdev_put (2)
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syzbot has bisected this issue to:

commit f9006acc8dfe59e25aa75729728ac57a8d84fc32
Author: Florian Westphal <fw@strlen.de>
Date: Wed Apr 21 07:51:08 2021 +0000

netfilter: arp_tables: pass table pointer via nf_hook_ops

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12500ae5b00000
start commit: 04fe99a8d936 Add linux-next specific files for 20211207
git tree: linux-next
final oops: https://syzkaller.appspot.com/x/report.txt?x=11500ae5b00000
console output: https://syzkaller.appspot.com/x/log.txt?x=16500ae5b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=4589399873466942
dashboard link: https://syzkaller.appspot.com/bug?extid=643e4ce4b6ad1347d372
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11bb96ceb00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15ad1badb00000

Reported-by: syzbot+643e4ce4b6ad1347d372@syzkaller.appspotmail.com
Fixes: f9006acc8dfe ("netfilter: arp_tables: pass table pointer via nf_hook_ops")

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

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