bcachefs (loop1): check_btree_backpointers... done
bcachefs (loop1): check_backpointers_to_extents... done
bcachefs (loop1): check_extents_to_backpointers...
------------[ cut here ]------------
kernel BUG at fs/bcachefs/backpointers.c:841!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 6706 Comm: syz.1.34 Not tainted 6.14.0-syzkaller-gd6b13dbd03b7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : data_type_to_alloc_counter fs/bcachefs/backpointers.c:832 [inline]
pc : check_bucket_backpointer_mismatch fs/bcachefs/backpointers.c:892 [inline]
pc : bch2_check_extents_to_backpointers+0x42f0/0x4334 fs/bcachefs/backpointers.c:1087
lr : data_type_to_alloc_counter fs/bcachefs/backpointers.c:832 [inline]
lr : check_bucket_backpointer_mismatch fs/bcachefs/backpointers.c:892 [inline]
lr : bch2_check_extents_to_backpointers+0x42f0/0x4334 fs/bcachefs/backpointers.c:1087
sp : ffff8000a5055f40
x29: ffff8000a5056fd0 x28: dfff800000000000 x27: ffff0000f8c0e428
x26: ffff8000a5056c10 x25: ffff8000a5056e08 x24: 0000000000000008
x23: ffff0000ef2a01d2 x22: ffff8000a5056df0 x21: 0000000000000022
x20: 000000000000000d x19: ffff700014a0ac34 x18: ffff8000a5056c20
x17: 4d5f534f5020303a x16: ffff80008b7cc4c8 x15: 000000000000000d
x14: 1ffff00014a0ab18 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 000000000007ffff x9 : ffff8000a585b000
x8 : 0000000000080000 x7 : 0000000000000000 x6 : 0088200000000000
x5 : ffff0000d0478418 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000008 x1 : 000000000000000d x0 : 0000000000000005
Call trace:
 data_type_to_alloc_counter fs/bcachefs/backpointers.c:832 [inline] (P)
 check_bucket_backpointer_mismatch fs/bcachefs/backpointers.c:892 [inline] (P)
 bch2_check_extents_to_backpointers+0x42f0/0x4334 fs/bcachefs/backpointers.c:1087 (P)
 bch2_run_recovery_pass+0xe4/0x1d4 fs/bcachefs/recovery_passes.c:226
 bch2_run_recovery_passes+0x260/0x92c fs/bcachefs/recovery_passes.c:291
 bch2_fs_recovery+0x20e0/0x32ec fs/bcachefs/recovery.c:936
 bch2_fs_start+0x32c/0x570 fs/bcachefs/super.c:1041
 bch2_fs_get_tree+0xa50/0x11d4 fs/bcachefs/fs.c:2203
 vfs_get_tree+0x90/0x28c fs/super.c:1814
 do_new_mount+0x278/0x900 fs/namespace.c:3560
 path_mount+0x590/0xe04 fs/namespace.c:3887
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount fs/namespace.c:4088 [inline]
 __arm64_sys_mount+0x4f4/0x5d0 fs/namespace.c:4088
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: d4210000 9775310d d4210000 9775310b (d4210000) 
---[ end trace 0000000000000000 ]---