------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 0 PID: 3665 at fs/buffer.c:1145 __brelse fs/buffer.c:1145 [inline] WARNING: CPU: 0 PID: 3665 at fs/buffer.c:1145 brelse+0x78/0xa0 include/linux/buffer_head.h:326 Modules linked in: CPU: 0 PID: 3665 Comm: syz-executor.1 Not tainted 6.1.0-rc7-syzkaller-00123-ga4412fdd49dc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__brelse fs/buffer.c:1145 [inline] RIP: 0010:brelse+0x78/0xa0 include/linux/buffer_head.h:326 Code: df be 04 00 00 00 e8 a7 84 e0 ff f0 ff 0b eb 1c e8 ed 66 8c ff eb 15 e8 e6 66 8c ff 48 c7 c7 c0 ff fd 8a 31 c0 e8 98 05 54 ff <0f> 0b 5b 5d c3 89 d9 80 e1 07 80 c1 03 38 c1 7c af 48 89 df e8 af RSP: 0018:ffffc90004dff7c8 EFLAGS: 00010046 RAX: 854dd5dfe3685400 RBX: ffff88802c3cab40 RCX: ffff8880229c8000 RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff816e560d R09: ffffed1017304f1c R10: ffffed1017304f1c R11: 1ffff11017304f1b R12: ffff8880b983ae80 R13: 0000000000000000 R14: ffff8880b9835d38 R15: dffffc0000000000 FS: 000055555727b400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f277ecdee28 CR3: 00000000444e3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __invalidate_bh_lrus+0x37/0x3c0 fs/buffer.c:1380 invalidate_bh_lru+0x66/0xb0 fs/buffer.c:1393 smp_call_function_many_cond+0xcb2/0x13d0 kernel/smp.c:978 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155 invalidate_bdev+0x8a/0xb0 block/bdev.c:85 btrfs_close_bdev fs/btrfs/volumes.c:1106 [inline] btrfs_close_one_device fs/btrfs/volumes.c:1130 [inline] close_fs_devices+0x443/0x8b0 fs/btrfs/volumes.c:1172 btrfs_close_devices+0xc9/0x420 fs/btrfs/volumes.c:1187 close_ctree+0x711/0xbde fs/btrfs/disk-io.c:4720 generic_shutdown_super+0x130/0x310 fs/super.c:492 kill_anon_super+0x36/0x60 fs/super.c:1086 btrfs_kill_super+0x3d/0x50 fs/btrfs/super.c:2441 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x494/0x520 fs/namespace.c:1186 task_work_run+0x243/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fad1968d547 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 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 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff2f5d6708 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fad1968d547 RDX: 00007fff2f5d67db RSI: 000000000000000a RDI: 00007fff2f5d67d0 RBP: 00007fff2f5d67d0 R08: 00000000ffffffff R09: 00007fff2f5d65a0 R10: 000055555727c8b3 R11: 0000000000000246 R12: 00007fad196e6b24 R13: 00007fff2f5d7890 R14: 000055555727c810 R15: 00007fff2f5d78d0