u64s 9 type backpointer 0:11010048:0 len 0 ver 0: bucket=0:42:0 btree=deleted_inodes level=1 suboffset=0 len=256 gen=0 pos=SPOS_MAX, fixing
 done
bcachefs (loop2): check_backpointers_to_extents... done
bcachefs (loop2): 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: 0 UID: 0 PID: 8611 Comm: syz.2.356 Not tainted 6.14.0-rc6-syzkaller-ga5618886fdab #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 : ffff80009bb15f40
x29: ffff80009bb16fd0 x28: dfff800000000000 x27: ffff0000e79c0b60
x26: ffff80009bb16c10 x25: ffff80009bb16e08 x24: 0000000000000008
x23: ffff0000ee1a01d2 x22: ffff80009bb16df0 x21: 0000000000000021
x20: 00000000fffffffd x19: ffff700013762c34 x18: ffff80009bb16c20
x17: 4d5f534f5020303a x16: ffff80008b732588 x15: 000000000000000d
x14: 1ffff00013762b18 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 000000000007ffff x9 : ffff8000a9fba000
x8 : 0000000000080000 x7 : 0000000000000000 x6 : 0088200000000000
x5 : ffff0000e7da8390 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000008 x1 : 00000000000000fd 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 977525fe d4210000 977525fc (d4210000) 
---[ end trace 0000000000000000 ]---