BTRFS info (device loop0): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d BTRFS info (device loop0): at unmount dio bytes count 65536 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7292 at fs/btrfs/block-group.c:159 btrfs_put_block_group fs/btrfs/block-group.c:159 [inline] WARNING: CPU: 1 PID: 7292 at fs/btrfs/block-group.c:159 btrfs_put_block_group+0x3b6/0x450 fs/btrfs/block-group.c:146 Modules linked in: CPU: 1 PID: 7292 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 fs/btrfs/block-group.c:159 [inline] RIP: 0010:btrfs_put_block_group+0x3b6/0x450 fs/btrfs/block-group.c:146 Code: 00 00 00 4c 89 ef e8 a9 e6 d0 00 e9 9a fe ff ff e8 cf 1b 3a fe e9 f9 fc ff ff e8 c5 1b 3a fe e9 2d fd ff ff e8 8b d6 de fd 90 <0f> 0b 90 e9 77 fd ff ff e8 7d d6 de fd b9 52 02 00 00 48 c7 c2 60 RSP: 0018:ffffc900037cfb58 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88804640e000 RCX: ffffffff83aeed1c RDX: ffff88805eafda00 RSI: ffffffff83aeefa5 RDI: 0000000000000007 RBP: 0000000000010000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000010000 R11: 0000000000000002 R12: ffff88801f810000 R13: 0000000000000001 R14: ffff88804640e160 R15: ffff88804640e000 FS: 0000555576ff8480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f87ebd7d000 CR3: 000000007e95c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: btrfs_free_block_groups+0x9f5/0x13e0 fs/btrfs/block-group.c:4418 close_ctree+0xa88/0xfd0 fs/btrfs/disk-io.c:4387 generic_shutdown_super+0x159/0x3d0 fs/super.c:641 kill_anon_super+0x3a/0x60 fs/super.c:1225 btrfs_kill_super+0x3b/0x50 fs/btrfs/super.c:2091 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f26ff47f1d7 Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007fffd0bb1668 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f26ff47f1d7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffd0bb1720 RBP: 00007fffd0bb1720 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffd0bb27e0 R13: 00007f26ff4c93b9 R14: 0000000000070b15 R15: 0000000000000010