BTRFS info (device loop1): last unmount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf BTRFS info (device loop1): at unmount dio bytes count 20480 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 16004 at fs/btrfs/block-group.c:159 btrfs_put_block_group+0x2ed/0x340 fs/btrfs/block-group.c:159 Modules linked in: CPU: 1 PID: 16004 Comm: syz-executor Not tainted 6.10.0-rc5-syzkaller-00175-g6d6444ba8205 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 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 0e 54 28 fe bf 38 16 00 00 49 03 3e 4c 89 f6 e8 de 8b 01 00 e9 c4 fe ff ff e8 04 e8 c5 fd 90 <0f> 0b 90 e9 88 fe ff ff e8 f6 e7 c5 fd e9 7e fe ff ff e8 ec e7 c5 RSP: 0018:ffffc9000b0b7ac8 EFLAGS: 00010293 RAX: ffffffff83d0414c RBX: 0000000000005000 RCX: ffff88802a6a8000 RDX: 0000000000000000 RSI: 0000000000005000 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff83d03fcf R09: 1ffff1100d82b349 R10: dffffc0000000000 R11: ffffed100d82b34a R12: dffffc0000000000 R13: 1ffff1100fafad2e R14: ffff88807d7d6800 R15: ffff88806c158188 FS: 000055558f263500(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc2ab9dff8 CR3: 000000006a75e000 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:4425 close_ctree+0x741/0xd20 fs/btrfs/disk-io.c:4381 generic_shutdown_super+0x136/0x2d0 fs/super.c:642 kill_anon_super+0x3b/0x70 fs/super.c:1226 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2096 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1267 task_work_run+0x24f/0x310 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+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fce04576e57 Code: a8 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 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffe37d58908 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fce04576e57 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe37d589c0 RBP: 00007ffe37d589c0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe37d59a70 R13: 00007fce045e364a R14: 0000000000206ff5 R15: 00007ffe37d59ab0