Hello, syzbot found the following issue on:
HEAD commit: c8bc81a52d5a Merge tag 'arm64-fixes' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16a9ce34580000 kernel config: https://syzkaller.appspot.com/x/.config?x=385d836f07b5a70d dashboard link: https://syzkaller.appspot.com/bug?extid=3bf8b0169d7fcc0ebcd5 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-c8bc81a5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9c0190a39aee/vmlinux-c8bc81a5.xz kernel image: https://storage.googleapis.com/syzbot-assets/fc2b728f9900/bzImage-c8bc81a5.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3bf8b0169d7fcc0eb...@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5373 at fs/bcachefs/recovery_passes.c:174 bch2_recovery_pass_want_ratelimit+0x1d8/0x290 fs/bcachefs/recovery_passes.c:174 Modules linked in: CPU: 0 UID: 0 PID: 5373 Comm: bch-copygc/loop Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:bch2_recovery_pass_want_ratelimit+0x1d8/0x290 fs/bcachefs/recovery_passes.c:174 Code: fd 40 20 eb eb 0e e8 17 04 6b fd eb 05 e8 10 04 6b fd 31 db 89 d8 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc e8 f9 03 6b fd 90 <0f> 0b 90 e9 d1 fe ff ff e8 eb 03 6b fd 48 c7 c7 80 c1 79 8e 48 89 RSP: 0018:ffffc9000d326cb0 EFLAGS: 00010293 RAX: ffffffff8454b747 RBX: 000000000000000e RCX: ffff888033b9a440 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff888055f8eb5c R09: 0000000000000003 R10: ffff888055f8eb5b R11: ffffed100abf1d6c R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff888052e00000 R15: 1ffff92001a64da5 FS: 0000000000000000(0000) GS:ffff88808d20d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000002140 CR3: 00000000334f3000 CR4: 0000000000352ef0 Call Trace: <TASK> recovery_pass_needs_set+0x9a/0x510 fs/bcachefs/recovery_passes.c:302 bch2_run_explicit_recovery_pass+0x3f/0xd0 fs/bcachefs/recovery_passes.c:416 bch2_check_bucket_backpointer_mismatch+0x634/0x690 fs/bcachefs/backpointers.c:1220 __bch2_move_data_phys+0x17a7/0x1c50 fs/bcachefs/move.c:922 bch2_evacuate_bucket+0x228/0x3a0 fs/bcachefs/move.c:1082 bch2_copygc+0x3be3/0x4510 fs/bcachefs/movinggc.c:234 bch2_copygc_thread+0x97a/0xe00 fs/bcachefs/movinggc.c:409 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> --- 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 syzkal...@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title 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
