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AJvYcCVDIGf2jvZM9bW3QPy8V8CtRoEmX9VXrYv4NWd8dig955May3DkFemlT+KOUF7fNymVRan9Hyhhvly33mKhsjWYmRMC6uHaaV7qg+mTD1Y= X-Gm-Message-State: AOJu0YzXDsbdisRrOFt7baJHlkQNbnBx5zDlq1Hsvm74mLsZ48ueVpoK pcWmkvjdR9t1o/EfLMtmQgdHxJPQpQ9ry05HDlwcUz4fUHnTyHRUpV4Mv7V7ZWeq/Rh3j8F2feN 9VXkNjJnG8t+p2uUOpC/4f2SH5hIjF3y8onAbQ0d6RwIe5FMtINC2JIw= X-Google-Smtp-Source: AGHT+IHD0Yu2uE0z3DkHFtyjctSeLnLwno4ZUf7y5iKxYVCxNGFBwz0doH8a3bgchbMrsMfhmMlDrMr/wPHiSAIbtllNvK9c8iRj Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:29cd:b0:7de:e10b:859f with SMTP id ca18e2360f4ac-7e1b519d499mr68383539f.1.1715694996781; Tue, 14 May 2024 06:56:36 -0700 (PDT) Date: Tue, 14 May 2024 06:56:36 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d38be106186a5e45@google.com> Subject: [syzbot] [bcachefs?] kernel panic: bch_dev->ref underflow, last put: bch2_get_next_dev From: syzbot To: bfoster@redhat.com, boqun.feng@gmail.com, frederic@kernel.org, jiangshanlai@gmail.com, joel@joelfernandes.org, josh@joshtriplett.org, kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, mathieu.desnoyers@efficios.com, paulmck@kernel.org, qiang.zhang1211@gmail.com, quic_neeraju@quicinc.com, rcu@vger.kernel.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 75fa778d74b7 Add linux-next specific files for 20240510 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=1440d068980000 kernel config: https://syzkaller.appspot.com/x/.config?x=ccdd3ebd6715749a dashboard link: https://syzkaller.appspot.com/bug?extid=a96175a4ea467a49c546 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=128cd23f180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15244970980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ad9391835bcf/disk-75fa778d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d827b3da9a26/vmlinux-75fa778d.xz kernel image: https://storage.googleapis.com/syzbot-assets/8f32f0182388/bzImage-75fa778d.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/6a0d89f813ac/mount_0.gz The issue was bisected to: commit 552aa5486579c18b4f8e7ca03ef88fa573c517b5 Author: Kent Overstreet Date: Fri May 3 22:07:40 2024 +0000 bcachefs: Debug asserts for ca->ref bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10d08b5c980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=12d08b5c980000 console output: https://syzkaller.appspot.com/x/log.txt?x=14d08b5c980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a96175a4ea467a49c546@syzkaller.appspotmail.com Fixes: 552aa5486579 ("bcachefs: Debug asserts for ca->ref") bucket 0:19 gen 51 different types of data in same bucket: (invalid data type), sb while marking sb, shutting down bcachefs (loop0): inconsistency detected - emergency read only at journal seq 10 bcachefs (loop0): bch2_trans_mark_dev_sb(): error EIO Kernel panic - not syncing: bch_dev->ref underflow, last put: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] Kernel panic - not syncing: bch_dev->ref underflow, last put: rcu_read_lock include/linux/rcupdate.h:781 [inline] Kernel panic - not syncing: bch_dev->ref underflow, last put: bch2_get_next_dev+0x26/0x500 fs/bcachefs/sb-members.h:126 CPU: 1 PID: 5098 Comm: syz-executor215 Not tainted 6.9.0-rc7-next-20240510-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 panic+0x349/0x860 kernel/panic.c:347 __bch2_dev_put fs/bcachefs/sb-members.h:109 [inline] bch2_dev_put fs/bcachefs/sb-members.h:121 [inline] bch2_trans_mark_dev_sbs_flags+0xaa7/0xab0 fs/bcachefs/buckets.c:1467 bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:182 bch2_run_recovery_passes+0x19e/0x820 fs/bcachefs/recovery_passes.c:225 bch2_fs_recovery+0x2370/0x3700 fs/bcachefs/recovery.c:804 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1031 bch2_fs_open+0xa8d/0xdf0 fs/bcachefs/super.c:2123 bch2_mount+0x71d/0x1320 fs/bcachefs/fs.c:1917 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1780 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7f37cfa8ca Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff662e7d38 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fff662e7d50 RCX: 00007f7f37cfa8ca RDX: 0000000020011a00 RSI: 0000000020000200 RDI: 00007fff662e7d50 RBP: 0000000000000004 R08: 00007fff662e7d90 R09: 00000000000119eb R10: 000000000120041c R11: 0000000000000282 R12: 000000000120041c R13: 00007fff662e7d90 R14: 0000000000000003 R15: 0000000001000000 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup