[syzbot] [btrfs?] kernel BUG in btrfs_cancel_balance

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    57012c57536f Merge tag 'net-6.5-rc4' of git://git.kernel.o..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1413a086a80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5d10d93e1ae1f229
dashboard link: https://syzkaller.appspot.com/bug?extid=d6443e1f040e8d616e7b
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=137d82cea80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7336195c1d93/disk-57012c57.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e7a6562e4033/vmlinux-57012c57.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7d66531ff83b/bzImage-57012c57.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/e6f09fca3191/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d6443e1f040e8d616e7b@xxxxxxxxxxxxxxxxxxxxxxxxx

------------[ cut here ]------------
kernel BUG at fs/btrfs/volumes.c:4642!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5160 Comm: syz-executor.1 Not tainted 6.5.0-rc3-syzkaller-00123-g57012c57536f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:btrfs_cancel_balance+0x429/0x430 fs/btrfs/volumes.c:4641
Code: e8 1c 31 01 00 4c 89 ef 48 c7 c6 00 fd 4a 8b e8 ad 1a 24 07 e9 ef fe ff ff e8 a3 af 25 07 e8 3e 04 f5 fd 0f 0b e8 37 04 f5 fd <0f> 0b 0f 1f 44 00 00 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41
RSP: 0018:ffffc90004b7fdc0 EFLAGS: 00010293
RAX: ffffffff839711d9 RBX: ffff888063844010 RCX: ffff888079498000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffffc90004b7fed0 R08: ffff8880638453d3 R09: 1ffff1100c708a7a
R10: dffffc0000000000 R11: ffffed100c708a7b R12: 1ffff9200096ffc0
R13: ffff888063845468 R14: dffffc0000000000 R15: ffff888063845460
FS:  00007fab7440b6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c1abfe000 CR3: 000000007aa05000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_ioctl_balance_ctl+0x3f/0x70 fs/btrfs/ioctl.c:3632
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:856
 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: 0033:0x7fab7367cb29
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:00007fab7440b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fab7379c120 RCX: 00007fab7367cb29
RDX: 0000000000000002 RSI: 0000000040049421 RDI: 0000000000000006
RBP: 00007fab736c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fab7379c120 R15: 00007ffcf21c7038
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:btrfs_cancel_balance+0x429/0x430 fs/btrfs/volumes.c:4641
Code: e8 1c 31 01 00 4c 89 ef 48 c7 c6 00 fd 4a 8b e8 ad 1a 24 07 e9 ef fe ff ff e8 a3 af 25 07 e8 3e 04 f5 fd 0f 0b e8 37 04 f5 fd <0f> 0b 0f 1f 44 00 00 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41
RSP: 0018:ffffc90004b7fdc0 EFLAGS: 00010293

RAX: ffffffff839711d9 RBX: ffff888063844010 RCX: ffff888079498000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffffc90004b7fed0 R08: ffff8880638453d3 R09: 1ffff1100c708a7a
R10: dffffc0000000000 R11: ffffed100c708a7b R12: 1ffff9200096ffc0
R13: ffff888063845468 R14: dffffc0000000000 R15: ffff888063845460
FS:  00007fab7440b6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c22cd71e5 CR3: 000000007aa05000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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