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Sat, 07 Jun 2025 23:58:03 -0700 (PDT) Date: Sat, 07 Jun 2025 23:58:03 -0700 In-Reply-To: <67a2b20a.050a0220.50516.0003.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6845347b.050a0220.d8705.000c.GAE@google.com> Subject: Re: [syzbot] [bcachefs?] [rcu?] BUG: unable to handle kernel NULL pointer dereference in rcu_core (3) From: syzbot To: akpm@linux-foundation.org, ayaanmirza.788@gmail.com, ayaanmirzabaig85@gmail.com, josh@joshtriplett.org, kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, luto@kernel.org, paulmck@kernel.org, peterz@infradead.org, rcu@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: E3FCD1C0009 X-Stat-Signature: 39x9ytb6jw6bghkqeq8d5uzeuxae5b8j X-Rspam-User: X-HE-Tag: 1749365883-854776 X-HE-Meta: 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 iHopTcM7 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: syzbot has bisected this issue to: commit 14152654805256d760315ec24e414363bfa19a06 Author: Kent Overstreet Date: Mon Nov 25 05:21:27 2024 +0000 bcachefs: Bad btree roots are now autofix bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12fa0a82580000 start commit: 99fa936e8e4f Merge tag 'affs-6.14-rc5-tag' of git://git.ke.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=11fa0a82580000 console output: https://syzkaller.appspot.com/x/log.txt?x=16fa0a82580000 kernel config: https://syzkaller.appspot.com/x/.config?x=523d3ff8e053340a dashboard link: https://syzkaller.appspot.com/bug?extid=80e5d6f453f14a53383a syz repro: https://syzkaller.appspot.com/x/repro.syz?x=119d35a8580000 Reported-by: syzbot+80e5d6f453f14a53383a@syzkaller.appspotmail.com Fixes: 141526548052 ("bcachefs: Bad btree roots are now autofix") For information about bisection process see: https://goo.gl/tpsmEJ#bisection