BTRFS info (device loop0): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d BTRFS info (device loop0): at unmount dio bytes count 57344 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5974 at fs/btrfs/block-group.c:159 btrfs_put_block_group+0x2ed/0x340 fs/btrfs/block-group.c:159 Modules linked in: CPU: 0 PID: 5974 Comm: syz-executor.0 Not tainted 6.9.0-rc6-syzkaller-00053-g0106679839f7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:btrfs_put_block_group+0x2ed/0x340 fs/btrfs/block-group.c:159 Code: 42 80 3c 20 00 74 08 4c 89 f7 e8 ae 30 29 fe bf c8 15 00 00 49 03 3e 4c 89 f6 e8 0e 88 01 00 e9 c4 fe ff ff e8 a4 e0 c7 fd 90 <0f> 0b 90 e9 88 fe ff ff e8 96 e0 c7 fd e9 7e fe ff ff e8 8c e0 c7 RSP: 0018:ffffc90009bb7928 EFLAGS: 00010293 RAX: ffffffff83ce308c RBX: 000000000000e000 RCX: ffff88801e889e00 RDX: 0000000000000000 RSI: 000000000000e000 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff83ce2f0f R09: 1ffff1100be42b3b R10: dffffc0000000000 R11: ffffed100be42b3c R12: dffffc0000000000 R13: 1ffff1100f73f82e R14: ffff88807b9fc000 R15: ffff88805f214188 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd217a1cd8 CR3: 000000005fdbc000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: btrfs_free_block_groups+0xb77/0x1070 fs/btrfs/block-group.c:4418 close_ctree+0x75a/0xd40 fs/btrfs/disk-io.c:4387 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_anon_super+0x3b/0x70 fs/super.c:1225 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2091 deactivate_locked_super+0xc4/0x130 fs/super.c:472 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267 task_work_run+0x24f/0x310 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa1b/0x27e0 kernel/exit.c:878 do_group_exit+0x207/0x2c0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [inline] __se_sys_exit_group kernel/exit.c:1036 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f79dce7dea9 Code: Unable to access opcode bytes at 0x7f79dce7de7f. RSP: 002b:00007ffc0947c808 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f79dcec942b RCX: 00007f79dce7dea9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000016 R08: 00007ffc0947a5a6 R09: 00007ffc0947dac0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc0947dac0 R13: 00007f79dcec93b9 R14: 000055555daf7430 R15: 000000000000001e