BTRFS: device fsid f90cac8b-044b-4fa8-8bee-4b8d3da88dc2 devid 1 transid 7 /dev/loop0
BTRFS info (device loop0): turning on flush-on-commit
BTRFS info (device loop0): disk space caching is enabled
BTRFS info (device loop0): has skinny extents
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8151 at fs/fs-writeback.c:2390 __writeback_inodes_sb_nr.cold+0x11/0x18 fs/fs-writeback.c:2390
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8151 Comm: btrfs-transacti Not tainted 4.19.190-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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:186
 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
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:__writeback_inodes_sb_nr.cold+0x11/0x18 fs/fs-writeback.c:2390
Code: bb e8 5d e2 6e f9 48 c7 c7 e0 f3 74 88 e8 76 ea fe ff 0f 0b e9 ac 33 ba f9 e8 45 e2 6e f9 48 c7 c7 e0 f3 74 88 e8 5e ea fe ff <0f> 0b e9 00 56 ba f9 e8 2d e2 6e f9 48 c7 c7 e0 f3 74 88 e8 46 ea
RSP: 0018:ffff88808bd5fc48 EFLAGS: 00010286
RAX: 0000000000000024 RBX: 1ffff110117abf8b RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814dde61 RDI: ffffed10117abf7b
RBP: ffff8880b257c680 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000006400
R13: ffff8880952b2bc0 R14: ffff8880b257c7b0 R15: ffff88808bd5fc88
 btrfs_start_delalloc_flush fs/btrfs/transaction.c:1925 [inline]
 btrfs_commit_transaction+0x1bb1/0x2480 fs/btrfs/transaction.c:2076
 transaction_kthread+0x385/0x490 fs/btrfs/disk-io.c:1794
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Kernel Offset: disabled
Rebooting in 86400 seconds..