loop0: detected capacity change from 0 to 32768 btrfs: Deprecated parameter 'usebackuproot' BTRFS warning: 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5318) BTRFS info (device loop0): first mount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf BTRFS info (device loop0): using crc32c checksum algorithm BTRFS info (device loop0): rebuilding free space tree BTRFS info (device loop0): setting nodatasum BTRFS info (device loop0): setting nodatacow BTRFS info (device loop0): enabling ssd optimizations BTRFS info (device loop0): disabling tree log BTRFS info (device loop0): turning on flush-on-commit BTRFS info (device loop0): enabling free space tree BTRFS info (device loop0): force clearing of disk cache BTRFS info (device loop0): trying to use backup root at mount time BTRFS info (device loop0): scrub: started on devid 1 ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: fs/btrfs/block-group.c:2862 at btrfs_create_pending_block_groups+0x14db/0x1a00 fs/btrfs/block-group.c:2862, CPU#0: syz.0.0/5318 Modules linked in: CPU: 0 UID: 0 PID: 5318 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:btrfs_create_pending_block_groups+0x14de/0x1a00 fs/btrfs/block-group.c:2862 Code: 12 ba fd e9 9f 03 00 00 e8 bf 1d 9f fd 84 c0 74 23 e8 f6 11 ba fd e9 8c 03 00 00 e8 ec 11 ba fd 48 8d 3d 55 fa 0e 0c 44 89 f6 <67> 48 0f b9 3a e9 3f 04 00 00 e8 73 29 92 07 41 89 c4 31 ff 89 c6 RSP: 0018:ffffc9000c387780 EFLAGS: 00010287 RAX: ffffffff840a4b04 RBX: ffff888037ad8001 RCX: 0000000000100000 RDX: ffffc90020802000 RSI: 00000000ffffffe4 RDI: ffffffff90194560 RBP: ffffc9000c3879e8 R08: ffff8880002b4900 R09: 0000000000000003 R10: 00000000fffffffb R11: 0000000000000002 R12: dffffc0000000000 R13: fffff52001870f0c R14: 00000000ffffffe4 R15: ffff888038510858 FS: 00007f32d59f56c0(0000) GS:ffff88808cad4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f32d59d3ff0 CR3: 000000000ba1d000 CR4: 0000000000352ef0 Call Trace: __btrfs_end_transaction+0x140/0x640 fs/btrfs/transaction.c:1080 btrfs_inc_block_group_ro+0x63e/0x6f0 fs/btrfs/block-group.c:3151 scrub_enumerate_chunks+0x810/0x13d0 fs/btrfs/scrub.c:2836 btrfs_scrub_dev+0x771/0x11a0 fs/btrfs/scrub.c:3217 btrfs_ioctl_scrub+0x243/0x4a0 fs/btrfs/ioctl.c:3033 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f32d959af79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f32d59f5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f32d9815fa0 RCX: 00007f32d959af79 RDX: 0000200000000000 RSI: 00000000c400941b RDI: 0000000000000004 RBP: 00007f32d96316e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f32d9816038 R14: 00007f32d9815fa0 R15: 00007ffe6788aeb8 ---------------- Code disassembly (best guess): 0: 12 ba fd e9 9f 03 adc 0x39fe9fd(%rdx),%bh 6: 00 00 add %al,(%rax) 8: e8 bf 1d 9f fd call 0xfd9f1dcc d: 84 c0 test %al,%al f: 74 23 je 0x34 11: e8 f6 11 ba fd call 0xfdba120c 16: e9 8c 03 00 00 jmp 0x3a7 1b: e8 ec 11 ba fd call 0xfdba120c 20: 48 8d 3d 55 fa 0e 0c lea 0xc0efa55(%rip),%rdi # 0xc0efa7c 27: 44 89 f6 mov %r14d,%esi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: e9 3f 04 00 00 jmp 0x473 34: e8 73 29 92 07 call 0x79229ac 39: 41 89 c4 mov %eax,%r12d 3c: 31 ff xor %edi,%edi 3e: 89 c6 mov %eax,%esi