syzbot

BTRFS info (device loop0): enabling ssd optimizations
BTRFS info (device loop0): auto enabling async discard
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WARNING: CPU: 1 PID: 5029 at fs/read_write.c:504 __kernel_write_iter+0x69b/0x7c0
Modules linked in:
CPU: 1 PID: 5029 Comm: syz-executor286 Not tainted 6.6.0-rc4-syzkaller-00284-gb9ddbb0cde2a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:__kernel_write_iter+0x69b/0x7c0 fs/read_write.c:504
Code: 25 28 00 00 00 48 3b 84 24 e0 00 00 00 0f 85 2c 01 00 00 4c 89 f0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 65 0f 96 ff <0f> 0b 49 c7 c6 f7 ff ff ff eb a5 e8 55 0f 96 ff 4c 8b 74 24 18 eb
RSP: 0018:ffffc90003a1f700 EFLAGS: 00010293
RAX: ffffffff81f7fa2b RBX: 00000000000a801d RCX: ffff88807aa81dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003a1f830 R08: ffffffff81f7f46c R09: 0000000000000000
R10: ffffc90003a1f8a0 R11: fffff52000743f19 R12: 1ffff92000743eec
R13: 1ffff1100f7dc68a R14: ffff88807bee3400 R15: dffffc0000000000
FS:  0000555556283380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffec5ad37d8 CR3: 00000000767ef000 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+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/0x49b0 fs/btrfs/send.c:7936
 btrfs_ioctl_send+0x2113/0x2750 fs/btrfs/send.c:8312
 _btrfs_ioctl_send+0x2ff/0x430 fs/btrfs/ioctl.c:4364
 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:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f849e7f8649
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcf800b848 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffcf800ba18 RCX: 00007f849e7f8649
RDX: 00000000200000c0 RSI: 0000000040489426 RDI: 0000000000000003
RBP: 00007f849e870610 R08: 00007ffcf800ba18 R09: 00007ffcf800ba18
R10: 0000000000005598 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffcf800ba08 R14: 0000000000000001 R15: 0000000000000001
 </TASK>