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charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: ad26fc09dabf Merge tag 'mm-hotfixes-stable-2025-01-16-21-1.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=104fe1f8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=aadf89e2f6db86cc dashboard link: https://syzkaller.appspot.com/bug?extid=a3885f6d294f83923567 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=17ceba18580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=137ee9df980000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-ad26fc09.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e8c59e9a573f/vmlinux-ad26fc09.xz kernel image: https://storage.googleapis.com/syzbot-assets/8bfa2df81410/bzImage-ad26fc09.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/8485647a2ac3/mount_1.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a3885f6d294f83923567@syzkaller.appspotmail.com new u64s 5 type deleted 14293651161087:U64_MAX:U32_MAX len 0 ver 0 bcachefs (loop0): bch2_btree_update_start(): error EIO bcachefs (loop0): bch2_btree_update_start(): error EIO ------------[ cut here ]------------ kernel BUG at fs/bcachefs/recovery.c:130! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5306 Comm: syz-executor276 Not tainted 6.13.0-rc7-syzkaller-00160-gad26fc09dabf #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:replay_now_at fs/bcachefs/recovery.c:130 [inline] RIP: 0010:bch2_journal_replay+0x2a09/0x2a40 fs/bcachefs/recovery.c:346 Code: cd 35 7e 07 e8 68 9e 54 fd 90 0f 0b e8 60 9e 54 fd 90 0f 0b e8 58 9e 54 fd 90 0f 0b e8 50 9e 54 fd 90 0f 0b e8 48 9e 54 fd 90 <0f> 0b e8 40 9e 54 fd 90 0f 0b e8 38 9e 54 fd 90 0f 0b e8 30 9e 54 RSP: 0018:ffffc9000d297180 EFLAGS: 00010293 RAX: ffffffff844ae428 RBX: ff0000000000000b RCX: ffff88801f6b0000 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ff0000000000000b RBP: ffffc9000d297478 R08: ffffffff844ad999 R09: ffffffff84beba5f R10: 0000000000000004 R11: ffff88801f6b0000 R12: ffff888044a4abb8 R13: dffffc0000000000 R14: 00000000ffffffff R15: ffff888044a4abc0 FS: 000055555a053380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fd59292098 CR3: 0000000043c6e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:191 bch2_run_recovery_passes+0x3a7/0x880 fs/bcachefs/recovery_passes.c:244 bch2_fs_recovery+0x25cc/0x39d0 fs/bcachefs/recovery.c:861 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1037 bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2170 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3511 do_mount fs/namespace.c:3851 [inline] __do_sys_mount fs/namespace.c:4061 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4038 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1e71c47dfa 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:00007ffde82bfb88 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffde82bfba0 RCX: 00007f1e71c47dfa RDX: 00000000200058c0 RSI: 0000000020000140 RDI: 00007ffde82bfba0 RBP: 0000000000004800 R08: 00007ffde82bfbe0 R09: 0000000000005a2b R10: 0000000000004800 R11: 0000000000000282 R12: 0000000000000005 R13: 00007ffde82bfbe0 R14: 0000000000000004 R15: 0000000001000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:replay_now_at fs/bcachefs/recovery.c:130 [inline] RIP: 0010:bch2_journal_replay+0x2a09/0x2a40 fs/bcachefs/recovery.c:346 Code: cd 35 7e 07 e8 68 9e 54 fd 90 0f 0b e8 60 9e 54 fd 90 0f 0b e8 58 9e 54 fd 90 0f 0b e8 50 9e 54 fd 90 0f 0b e8 48 9e 54 fd 90 <0f> 0b e8 40 9e 54 fd 90 0f 0b e8 38 9e 54 fd 90 0f 0b e8 30 9e 54 RSP: 0018:ffffc9000d297180 EFLAGS: 00010293 RAX: ffffffff844ae428 RBX: ff0000000000000b RCX: ffff88801f6b0000 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ff0000000000000b RBP: ffffc9000d297478 R08: ffffffff844ad999 R09: ffffffff84beba5f R10: 0000000000000004 R11: ffff88801f6b0000 R12: ffff888044a4abb8 R13: dffffc0000000000 R14: 00000000ffffffff R15: ffff888044a4abc0 FS: 000055555a053380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fd59292098 CR3: 0000000043c6e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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.