RDX: 0000000000000020 RSI: 000000000004827e RDI: 0000200000007840
RBP: 00007f4286ba9b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4286d98038 R14: 00007f4286d97fa0 R15: 00007ffd8cd01e68
 </TASK>
------------[ cut here ]------------
kernel BUG at fs/btrfs/extent-tree.c:3311!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4754 Comm: syz.3.84 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
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:ffffc9000151f020 EFLAGS: 00010246
RAX: ffffffff83457b21 RBX: 1ffff110040dafc6 RCX: 0000000000080000
RDX: ffffc9000e20a000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000151f170 R08: 00000000000000a8 R09: 1ffffffff1a3e6ea
R10: dffffc0000000000 R11: fffffbfff1a3e6eb R12: ffff88805cd2e064
R13: ffff8880206d7e30 R14: 00000000fffffff4 R15: 0000000000000005
FS:  00007f4284d686c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f27f2723000 CR3: 0000000061b03000 CR4: 00000000003506f0
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_truncate_inode_items+0x712/0x21e0 fs/btrfs/inode.c:4829
 btrfs_truncate fs/btrfs/inode.c:9199 [inline]
 btrfs_setsize fs/btrfs/inode.c:5471 [inline]
 btrfs_setattr+0x91a/0xe20 fs/btrfs/inode.c:5506
 notify_change+0xbc6/0xee0 fs/attr.c:505
 do_truncate+0x1ac/0x240 fs/open.c:65
 handle_truncate fs/namei.c:3316 [inline]
 do_open fs/namei.c:3663 [inline]
 path_openat+0x293b/0x2fb0 fs/namei.c:3793
 do_filp_open+0x1df/0x400 fs/namei.c:3820
 do_sys_openat2+0x14b/0x500 fs/open.c:1255
 do_sys_open fs/open.c:1271 [inline]
 __do_sys_open fs/open.c:1279 [inline]
 __se_sys_open fs/open.c:1275 [inline]
 __x64_sys_open+0x11b/0x140 fs/open.c:1275
 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: 0033:0x7f4286b11b19
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:00007f4284d68028 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f4286d97fa0 RCX: 00007f4286b11b19
RDX: 0000000000000020 RSI: 000000000004827e RDI: 0000200000007840
RBP: 00007f4286ba9b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4286d98038 R14: 00007f4286d97fa0 R15: 00007ffd8cd01e68
 </TASK>
Modules linked in:
---[ end trace 272f23f33af504e4 ]---
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:ffffc9000151f020 EFLAGS: 00010246
RAX: ffffffff83457b21 RBX: 1ffff110040dafc6 RCX: 0000000000080000
RDX: ffffc9000e20a000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000151f170 R08: 00000000000000a8 R09: 1ffffffff1a3e6ea
R10: dffffc0000000000 R11: fffffbfff1a3e6eb R12: ffff88805cd2e064
R13: ffff8880206d7e30 R14: 00000000fffffff4 R15: 0000000000000005
FS:  00007f4284d686c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f27f2723000 CR3: 0000000061b03000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400