------------[ cut here ]------------
WARNING: CPU: 1 PID: 10706 at fs/read_write.c:504 __kernel_write_iter+0x600/0x710
Modules linked in:
CPU: 1 PID: 10706 Comm: syz-executor.1 Not tainted 6.1.65-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__kernel_write_iter+0x600/0x710 fs/read_write.c:504
Code: 25 28 00 00 00 48 3b 84 24 e0 00 00 00 0f 85 18 01 00 00 4c 89 f0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 f0 47 9a ff <0f> 0b 49 c7 c6 f7 ff ff ff eb a5 e8 e0 47 9a ff 4c 8b 74 24 18 eb
RSP: 0018:ffffc900050c7720 EFLAGS: 00010283
RAX: ffffffff81f04a90 RBX: 00000000000a801d RCX: 0000000000040000
RDX: ffffc9000afda000 RSI: 00000000000010aa RDI: 00000000000010ab
RBP: ffffc900050c7850 R08: ffffffff81f04565 R09: ffffc900050c78c0
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000a18ef0 R14: ffff888079abc280 R15: 1ffff1100f35785f
FS:  00007f9cac17c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe672079b13 CR3: 0000000049c8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __kernel_write fs/read_write.c:537 [inline]
 kernel_write+0x1d4/0x350 fs/read_write.c:558
 write_buf fs/btrfs/send.c:591 [inline]
 send_header fs/btrfs/send.c:709 [inline]
 send_subvol+0x1a7/0x4af0 fs/btrfs/send.c:7679
 btrfs_ioctl_send+0x21bc/0x26d0 fs/btrfs/send.c:8045
 _btrfs_ioctl_send+0x2fb/0x430 fs/btrfs/ioctl.c:5249
 btrfs_ioctl+0x5eb/0xc10
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9cab47cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9cac17c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9cab59c050 RCX: 00007f9cab47cae9
RDX: 0000000020000140 RSI: 0000000040489426 RDI: 0000000000000004
RBP: 00007f9cab4c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f9cab59c050 R15: 00007ffdc8a32e08
 </TASK>