------------[ cut here ]------------
WARNING: CPU: 1 PID: 6974 at fs/read_write.c:504 __kernel_write_iter+0x60e/0x720 fs/read_write.c:504
Modules linked in:
CPU: 1 PID: 6974 Comm: syz-executor.5 Not tainted 6.7.0-rc2-syzkaller-00147-gf1a09972a45a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__kernel_write_iter+0x60e/0x720 fs/read_write.c:504
Code: 28 00 00 00 48 3b 84 24 e0 00 00 00 0f 85 1a 01 00 00 4c 89 f0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a3 72 94 ff 90 <0f> 0b 90 49 c7 c6 f7 ff ff ff eb a3 e8 91 72 94 ff 4c 8b 74 24 18
RSP: 0018:ffffc90016d97720 EFLAGS: 00010283
RAX: ffffffff81fa06dd RBX: 00000000000a801d RCX: 0000000000040000
RDX: ffffc90004fa2000 RSI: 0000000000000d63 RDI: 0000000000000d64
RBP: ffffc90016d97850 R08: ffffffff81fa01a9 R09: 0000000000000000
R10: ffffc90016d978c0 R11: fffff52002db2f1d R12: dffffc0000000000
R13: 1ffff92002db2ef0 R14: ffff88802de18a00 R15: 1ffff11005bc314a
FS:  00007fed8461f6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2b56d4c723 CR3: 0000000024166000 CR4: 00000000003506f0
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+0x1d8/0x350 fs/read_write.c:558
 write_buf fs/btrfs/send.c:648 [inline]
 send_header fs/btrfs/send.c:766 [inline]
 send_subvol+0x1ab/0x44a0 fs/btrfs/send.c:7936
 btrfs_ioctl_send+0x2113/0x2750 fs/btrfs/send.c:8312
 _btrfs_ioctl_send+0x2ff/0x430 fs/btrfs/ioctl.c:4369
 btrfs_ioctl+0x90a/0xd40
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fed8387cae9
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:00007fed8461f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fed8399bf80 RCX: 00007fed8387cae9
RDX: 00000000200000c0 RSI: 0000000040489426 RDI: 0000000000000003
RBP: 00007fed838c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fed8399bf80 R15: 00007ffedcdfdd78
 </TASK>