* Re: [syzbot] KASAN: use-after-free Read in check_all_holdout_tasks_trace [not found] <000000000000f034fc05c2da6617@google.com> @ 2021-06-19 16:54 ` syzbot 2021-06-21 22:41 ` Paul E. McKenney 0 siblings, 1 reply; 3+ messages in thread From: syzbot @ 2021-06-19 16:54 UTC (permalink / raw) To: akpm, andrii, ast, axboe, bpf, christian, coreteam, daniel, davem, dsahern, dvyukov, fw, jiangshanlai, joel, john.fastabend, josh, kadlec, kafai, kpsingh, kuba, linux-kernel, mathieu.desnoyers, netdev, netfilter-devel, pablo, paulmck, peterz, rcu, rostedt, shakeelb, songliubraving, syzkaller-bugs, yanfei.xu, yhs, yoshfuji 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 ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] KASAN: use-after-free Read in check_all_holdout_tasks_trace 2021-06-19 16:54 ` [syzbot] KASAN: use-after-free Read in check_all_holdout_tasks_trace syzbot @ 2021-06-21 22:41 ` Paul E. McKenney 2021-06-28 8:43 ` Dmitry Vyukov 0 siblings, 1 reply; 3+ messages in thread From: Paul E. McKenney @ 2021-06-21 22:41 UTC (permalink / raw) To: syzbot Cc: akpm, andrii, ast, axboe, bpf, christian, coreteam, daniel, davem, dsahern, dvyukov, fw, jiangshanlai, joel, john.fastabend, josh, kadlec, kafai, kpsingh, kuba, linux-kernel, mathieu.desnoyers, netdev, netfilter-devel, pablo, peterz, rcu, rostedt, shakeelb, songliubraving, syzkaller-bugs, yanfei.xu, yhs, yoshfuji 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 ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] KASAN: use-after-free Read in check_all_holdout_tasks_trace 2021-06-21 22:41 ` Paul E. McKenney @ 2021-06-28 8:43 ` Dmitry Vyukov 0 siblings, 0 replies; 3+ messages in thread From: Dmitry Vyukov @ 2021-06-28 8:43 UTC (permalink / raw) To: paulmck Cc: syzbot, akpm, andrii, ast, axboe, bpf, christian, coreteam, daniel, davem, dsahern, fw, jiangshanlai, joel, john.fastabend, josh, kadlec, kafai, kpsingh, kuba, linux-kernel, mathieu.desnoyers, netdev, netfilter-devel, pablo, peterz, rcu, rostedt, shakeelb, songliubraving, syzkaller-bugs, yanfei.xu, yhs, yoshfuji On Tue, Jun 22, 2021 at 12:41 AM Paul E. McKenney <paulmck@kernel.org> wrote: > > 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()") Let's tell syzbot about these fixes, then it will tell us if they help or not. #syz fix: rcu-tasks: Don't delete holdouts within trc_inspect_reader() ^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-06-19 16:54 ` [syzbot] KASAN: use-after-free Read in check_all_holdout_tasks_trace syzbot
2021-06-21 22:41 ` Paul E. McKenney
2021-06-28 8:43 ` Dmitry Vyukov
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