------------[ cut here ]------------
WARNING: CPU: 0 PID: 20397 at fs/read_write.c:504 __kernel_write_iter+0x5b2/0x7b0 fs/read_write.c:504
Modules linked in:
CPU: 0 PID: 20397 Comm: syz-executor.5 Not tainted 6.7.0-rc2-next-20231121-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__kernel_write_iter+0x5b2/0x7b0 fs/read_write.c:504
Code: a0 b6 17 8d e8 ff 72 87 08 31 ff 89 c5 89 c6 e8 04 0b 9a ff 85 ed 75 21 48 c7 c5 ea ff ff ff e9 0b ff ff ff e8 7f 0f 9a ff 90 <0f> 0b 90 48 c7 c5 f7 ff ff ff e9 f6 fe ff ff e8 6a 0f 9a ff 48 b8
RSP: 0018:ffffc9000372f6a8 EFLAGS: 00010287
RAX: 0000000000002847 RBX: ffff88801c637680 RCX: ffffc90003ca1000
RDX: 0000000000040000 RSI: ffffffff81edfde1 RDI: 0000000000000005
RBP: 00000000000a801d R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801ff66808
R13: 1ffff920006e5ed7 R14: 0000000000000000 R15: ffff88801c6376d0
FS:  00007f9dccc896c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000206b8000 CR3: 000000002831a000 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 fs/read_write.c:558 [inline]
 kernel_write+0x1f8/0x6c0 fs/read_write.c:548
 write_buf fs/btrfs/send.c:648 [inline]
 send_header fs/btrfs/send.c:766 [inline]
 send_subvol fs/btrfs/send.c:7936 [inline]
 btrfs_ioctl_send+0x2310/0x6710 fs/btrfs/send.c:8312
 _btrfs_ioctl_send+0x117/0x2f0 fs/btrfs/ioctl.c:4369
 btrfs_ioctl+0x2bf5/0x61e0 fs/btrfs/ioctl.c:4660
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7f9dcbe7cae9
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:00007f9dccc890c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9dcbf9c050 RCX: 00007f9dcbe7cae9
RDX: 0000000020000140 RSI: 0000000040489426 RDI: 0000000000000004
RBP: 00007f9dcbec847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f9dcbf9c050 R15: 00007fffe15a69e8
 </TASK>