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: 8119 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: 8119 Comm: btrfs-transacti Not tainted 4.19.184-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 9d 02 6f f9 48 c7 c7 a0 f3 74 88 e8 76 ea fe ff 0f 0b e9 6c 50 ba f9 e8 85 02 6f f9 48 c7 c7 a0 f3 74 88 e8 5e ea fe ff <0f> 0b e9 c0 72 ba f9 e8 6d 02 6f f9 48 c7 c7 a0 f3 74 88 e8 46 ea RSP: 0018:ffff88809ce67c48 EFLAGS: 00010286 RAX: 0000000000000024 RBX: 1ffff110139ccf8b RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff814ddd51 RDI: ffffed10139ccf7b RBP: ffff8880b0c8e300 R08: 0000000000000024 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000006400 R13: ffff8880957ba480 R14: ffff8880b0c8e430 R15: ffff88809ce67c88 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..