------------[ cut here ]------------
WARNING: CPU: 1 PID: 6113 at fs/read_write.c:536 __kernel_write+0x740/0x950 fs/read_write.c:539
Modules linked in:
CPU: 1 PID: 6113 Comm: syz-executor.0 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:__kernel_write+0x740/0x950 fs/read_write.c:536
Code: fe ff ff 48 c7 c6 c0 f6 d6 88 48 c7 c7 20 dd cb 8a e8 d4 7c e1 01 85 c0 0f 85 ce 92 81 06 49 c7 c6 ea ff ff ff e9 96 fe ff ff <0f> 0b 49 c7 c6 f7 ff ff ff e9 88 fe ff ff 4c 89 04 24 e8 39 40 f7
RSP: 0018:ffffc900017d77c8 EFLAGS: 00010246
RAX: 00000000000a801d RBX: ffff88801dad2040 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffc900017d7b00 RDI: ffff88801dad20c4
RBP: 1ffff920002faefc R08: 0000000000000011 R09: ffffc900017d7b0c
R10: fffff520002faf61 R11: 0000000000000001 R12: ffff88801dad2040
R13: ffff88802ba7c008 R14: ffff88802ba7c008 R15: ffff88801dad2060
FS:  00007fa7a8842700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b02abf9ee CR3: 000000001d6c6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kernel_write fs/read_write.c:579 [inline]
 kernel_write+0xaf/0x420 fs/read_write.c:569
 write_buf fs/btrfs/send.c:555 [inline]
 send_header fs/btrfs/send.c:674 [inline]
 send_subvol fs/btrfs/send.c:7075 [inline]
 btrfs_ioctl_send+0x1ae9/0x3f00 fs/btrfs/send.c:7413
 _btrfs_ioctl_send+0x1ee/0x280 fs/btrfs/ioctl.c:4875
 btrfs_ioctl+0x4082/0x6850 fs/btrfs/ioctl.c:4989
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:739
 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fa7a94d00d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa7a8842168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa7a95eff80 RCX: 00007fa7a94d00d9
RDX: 00000000200003c0 RSI: 0000000040489426 RDI: 0000000000000003
RBP: 00007fa7a952bae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd18fb223f R14: 00007fa7a8842300 R15: 0000000000022000