Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 17 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffbf819058 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fffbf8190c8 RCX: 00007f098226bad9 RDX: 00000000200003c0 RSI: 00000000c4009420 RDI: 0000000000000004 RBP: 00007fffbf819060 R08: 0000000000000002 R09: 0000000000003233 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007fffbf8191a0 R14: 431bde82d7b634db R15: 00007fffbf8190a0 ------------[ cut here ]------------ kernel BUG at fs/btrfs/extent-tree.c:3252! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 5022 Comm: syz-executor168 Not tainted 6.4.0-syzkaller-11478-gd528014517f2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:btrfs_free_tree_block+0x266/0xb40 fs/btrfs/extent-tree.c:3252 Code: 00 48 8b 74 24 10 31 d2 4c 89 e7 e8 24 b1 17 00 31 ff 89 c6 89 44 24 10 e8 47 f2 1d fe 8b 44 24 10 85 c0 74 26 e8 1a f6 1d fe <0f> 0b e8 13 f6 1d fe 48 89 ee 48 c7 c7 fa ff ff ff c6 44 24 58 01 RSP: 0018:ffffc90003abf368 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888028b40000 RCX: 0000000000000000 RDX: ffff8880281cbb80 RSI: ffffffff8366e956 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000fffffff4 R11: 0000000000000001 R12: ffff8880749c2000 R13: 1ffff92000757e71 R14: 0000000000000001 R15: ffff888027498000 FS: 0000555556c7e3c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffcb171908 CR3: 000000007accf000 CR4: 0000000000350ee0 Call Trace: __btrfs_cow_block+0xf68/0x18e0 fs/btrfs/ctree.c:601 btrfs_cow_block+0x2fa/0x820 fs/btrfs/ctree.c:712 btrfs_search_slot+0x11c6/0x2dc0 fs/btrfs/ctree.c:2194 btrfs_insert_empty_items+0xbd/0x1c0 fs/btrfs/ctree.c:4376 btrfs_insert_empty_item fs/btrfs/ctree.h:635 [inline] insert_balance_item.isra.0+0x144/0x1460 fs/btrfs/volumes.c:3475 btrfs_balance+0x1145/0x4100 fs/btrfs/volumes.c:4380 btrfs_ioctl_balance fs/btrfs/ioctl.c:3604 [inline] btrfs_ioctl+0x12b7/0x5b50 fs/btrfs/ioctl.c:4637 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x19d/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f098226bad9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 17 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffbf819058 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fffbf8190c8 RCX: 00007f098226bad9 RDX: 00000000200003c0 RSI: 00000000c4009420 RDI: 0000000000000004 RBP: 00007fffbf819060 R08: 0000000000000002 R09: 0000000000003233 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007fffbf8191a0 R14: 431bde82d7b634db R15: 00007fffbf8190a0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:btrfs_free_tree_block+0x266/0xb40 fs/btrfs/extent-tree.c:3252 Code: 00 48 8b 74 24 10 31 d2 4c 89 e7 e8 24 b1 17 00 31 ff 89 c6 89 44 24 10 e8 47 f2 1d fe 8b 44 24 10 85 c0 74 26 e8 1a f6 1d fe <0f> 0b e8 13 f6 1d fe 48 89 ee 48 c7 c7 fa ff ff ff c6 44 24 58 01 RSP: 0018:ffffc90003abf368 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888028b40000 RCX: 0000000000000000 RDX: ffff8880281cbb80 RSI: ffffffff8366e956 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000fffffff4 R11: 0000000000000001 R12: ffff8880749c2000 R13: 1ffff92000757e71 R14: 0000000000000001 R15: ffff888027498000 FS: 0000555556c7e3c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffcb171908 CR3: 000000007accf000 CR4: 0000000000350ee0 ---------------- Code disassembly (best guess): 0: 28 00 sub %al,(%rax) 2: 00 00 add %al,(%rax) 4: 75 05 jne 0xb 6: 48 83 c4 28 add $0x28,%rsp a: c3 retq b: e8 d1 17 00 00 callq 0x17e1 10: 90 nop 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall * 2a: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 retq 33: 48 c7 c1 c0 ff ff ff mov $0xffffffffffffffc0,%rcx 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W