BTRFS info (device loop2): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d BTRFS info (device loop2): at unmount dio bytes count 438272 ------------[ cut here ]------------ WARNING: CPU: 3 PID: 5233 at fs/btrfs/block-group.c:159 btrfs_put_block_group fs/btrfs/block-group.c:159 [inline] WARNING: CPU: 3 PID: 5233 at fs/btrfs/block-group.c:159 btrfs_put_block_group+0x3b6/0x450 fs/btrfs/block-group.c:146 Modules linked in: CPU: 3 PID: 5233 Comm: syz-executor.2 Not tainted 6.10.0-rc2-syzkaller-00235-g8a92980606e3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 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 08 d2 00 e9 9a fe ff ff e8 3f 8c 38 fe e9 f9 fc ff ff e8 35 8c 38 fe e9 2d fd ff ff e8 7b ba dc fd 90 <0f> 0b 90 e9 77 fd ff ff e8 6d ba dc fd b9 5b 02 00 00 48 c7 c2 80 RSP: 0000:ffffc9000337fb58 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8880498a3000 RCX: ffffffff83b127ec RDX: ffff888022f14880 RSI: ffffffff83b12a75 RDI: 0000000000000007 RBP: 000000000006b000 R08: 0000000000000007 R09: 0000000000000000 R10: 000000000006b000 R11: 0000000000000002 R12: ffff8880239b0000 R13: 0000000000000001 R14: ffff8880498a3160 R15: ffff8880498a3000 FS: 000055556f61f480(0000) GS:ffff88806b300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f08e6ec7000 CR3: 0000000024478000 CR4: 0000000000350ef0 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+0xa54/0xf90 fs/btrfs/disk-io.c:4381 generic_shutdown_super+0x159/0x3d0 fs/super.c:642 kill_anon_super+0x3a/0x60 fs/super.c:1226 btrfs_kill_super+0x3b/0x50 fs/btrfs/super.c:2096 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 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+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe4c367e217 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:00007ffe53909618 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe4c367e217 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe539096d0 RBP: 00007ffe539096d0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe5390a790 R13: 00007fe4c36c8336 R14: 0000000000014dd6 R15: 0000000000000008