EXT4-fs (loop0): couldn't mount as ext3 due to feature incompatibilities
BTRFS info (device loop3): clearing free space tree
BTRFS info (device loop3): clearing 1 ro feature flag
BTRFS info (device loop3): clearing 2 ro feature flag
------------[ cut here ]------------
WARNING: CPU: 1 PID: 14078 at fs/fs-writeback.c:2370 __writeback_inodes_sb_nr.cold+0x11/0x18 fs/fs-writeback.c:2370
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 14078 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (14154)
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:__writeback_inodes_sb_nr.cold+0x11/0x18 fs/fs-writeback.c:2370
Code: e1 e8 36 ba 6d f9 48 c7 c7 c0 f9 74 88 e8 95 eb fe ff 0f 0b e9 75 12 b9 f9 e8 1e ba 6d f9 48 c7 c7 c0 f9 74 88 e8 7d eb fe ff <0f> 0b e9 c9 34 b9 f9 e8 06 ba 6d f9 48 c7 c7 c0 f9 74 88 e8 65 eb
RSP: 0018:ffff888028847400 EFLAGS: 00010282
RAX: 0000000000000024 RBX: 1ffff11005108e82 RCX: 0000000000000000
RDX: 000000000000db64 RSI: ffffffff814dff01 RDI: ffffed1005108e72
RBP: ffff888090b102c0 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000006400
R13: ffff88809260aac0 R14: ffff888090b103f0 R15: ffff888028847440
 btrfs_start_delalloc_flush fs/btrfs/transaction.c:1927 [inline]
 btrfs_commit_transaction+0x1bb1/0x2480 fs/btrfs/transaction.c:2078
 insert_balance_item.isra.0+0x11be/0x1430 fs/btrfs/volumes.c:3082
 btrfs_balance+0xd8f/0x3f30 fs/btrfs/volumes.c:3865
 btrfs_ioctl_balance+0x66c/0x750 fs/btrfs/ioctl.c:5141
 btrfs_ioctl+0xd80/0x76d0 fs/btrfs/ioctl.c:6001
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f021fbb50f9
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:00007f021e127168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f021fcd4f80 RCX: 00007f021fbb50f9
RDX: 0000000020000e80 RSI: 00000000c4009420 RDI: 0000000000000006
RBP: 00007f021fc10ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff0a2cb51f R14: 00007f021e127300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..