R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1c9e59e038 R14: 00007f1c9e59dfa0 R15: 00007ffd4e307088
 </TASK>
------------[ cut here ]------------
kernel BUG at fs/btrfs/extent-tree.c:3311!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4322 Comm: syz.4.7 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:btrfs_free_tree_block+0xb71/0xb80 fs/btrfs/extent-tree.c:3311
Code: e9 02 f9 ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 07 f9 ff ff be 08 00 00 00 4c 89 e7 e8 69 fb 78 fe e9 f5 f8 ff ff e8 6f b2 33 fe <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 41 57 41 56 41 55
RSP: 0018:ffffc9000305f0c0 EFLAGS: 00010246
RAX: ffffffff83457b21 RBX: 1ffff1100494e214 RCX: 0000000000080000
RDX: ffffc9000e3ea000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000305f210 R08: 00000000000000a8 R09: 1ffffffff1a3e6ea
R10: dffffc0000000000 R11: fffffbfff1a3e6eb R12: ffff88805d90c064
R13: ffff888024a710a0 R14: 00000000fffffff4 R15: 000000000000000a
FS:  00007f1c9c56e6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fedd3328dac CR3: 0000000024102000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_force_cow_block+0xc4d/0x1760 fs/btrfs/ctree.c:480
 btrfs_cow_block+0x33e/0x7d0 fs/btrfs/ctree.c:598
 btrfs_search_slot+0x9d4/0x2090 fs/btrfs/ctree.c:-1
 btrfs_search_prev_slot fs/btrfs/free-space-tree.c:121 [inline]
 remove_free_space_extent fs/btrfs/free-space-tree.c:713 [inline]
 __remove_from_free_space_tree fs/btrfs/free-space-tree.c:808 [inline]
 remove_from_free_space_tree+0x3a2/0xa50 fs/btrfs/free-space-tree.c:837
 alloc_reserved_tree_block fs/btrfs/extent-tree.c:4713 [inline]
 run_delayed_tree_ref fs/btrfs/extent-tree.c:1702 [inline]
 run_one_delayed_ref fs/btrfs/extent-tree.c:1731 [inline]
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1977 [inline]
 __btrfs_run_delayed_refs+0x1424/0x3920 fs/btrfs/extent-tree.c:2041
 btrfs_run_delayed_refs+0x133/0x480 fs/btrfs/extent-tree.c:2172
 btrfs_commit_transaction+0x23d/0x3580 fs/btrfs/transaction.c:2180
 create_snapshot+0x469/0x800 fs/btrfs/ioctl.c:785
 btrfs_mksubvol+0x64e/0x790 fs/btrfs/ioctl.c:935
 btrfs_mksnapshot+0xb1/0xf0 fs/btrfs/ioctl.c:981
 __btrfs_ioctl_snap_create+0x449/0x570 fs/btrfs/ioctl.c:1871
 btrfs_ioctl_snap_create_v2+0x1b9/0x3e0 fs/btrfs/ioctl.c:1958
 btrfs_ioctl+0x75f/0xb10 fs/btrfs/ioctl.c:-1
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1c9e317559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1c9c56e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1c9e59dfa0 RCX: 00007f1c9e317559
RDX: 0000200000005a00 RSI: 0000000050009417 RDI: 0000000000000004
RBP: 00007f1c9e3aeb50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1c9e59e038 R14: 00007f1c9e59dfa0 R15: 00007ffd4e307088
 </TASK>
Modules linked in:
---[ end trace 41b0dc14c6451d59 ]---
RIP: 0010:btrfs_free_tree_block+0xb71/0xb80 fs/btrfs/extent-tree.c:3311
Code: e9 02 f9 ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 07 f9 ff ff be 08 00 00 00 4c 89 e7 e8 69 fb 78 fe e9 f5 f8 ff ff e8 6f b2 33 fe <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 41 57 41 56 41 55
RSP: 0018:ffffc9000305f0c0 EFLAGS: 00010246
RAX: ffffffff83457b21 RBX: 1ffff1100494e214 RCX: 0000000000080000
RDX: ffffc9000e3ea000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000305f210 R08: 00000000000000a8 R09: 1ffffffff1a3e6ea
R10: dffffc0000000000 R11: fffffbfff1a3e6eb R12: ffff88805d90c064
R13: ffff888024a710a0 R14: 00000000fffffff4 R15: 000000000000000a
FS:  00007f1c9c56e6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f900e536000 CR3: 0000000024102000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400