Messages in this thread | | | Date | Mon, 21 Jun 2021 15:41:19 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [syzbot] KASAN: use-after-free Read in check_all_holdout_tasks_trace |
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On Sat, Jun 19, 2021 at 09:54:06AM -0700, syzbot wrote: > 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=10dceae8300000 > start commit: 0c38740c selftests/bpf: Fix ringbuf test fetching map FD > git tree: bpf-next > final oops: https://syzkaller.appspot.com/x/report.txt?x=12dceae8300000 > console output: https://syzkaller.appspot.com/x/log.txt?x=14dceae8300000 > kernel config: https://syzkaller.appspot.com/x/.config?x=a6380da8984033f1 > dashboard link: https://syzkaller.appspot.com/bug?extid=7b2b13f4943374609532 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1264c2d7d00000 > > Reported-by: syzbot+7b2b13f4943374609532@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
I am not seeing any mention of check_all_holdout_tasks_trace() in the console output, but I again suggest the following two patches:
6a04a59eacbd ("rcu-tasks: Don't delete holdouts within trc_inspect_reader()" dd5da0a9140e ("rcu-tasks: Don't delete holdouts within trc_wait_for_one_reader()")
Thanx, Paul
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