NILFS (loop0): discard dirty block: blocknr=9, size=1024
NILFS (loop5): discard dirty block: blocknr=251, size=1024
NILFS (loop5): discard dirty block: blocknr=252, size=1024
------------[ cut here ]------------
NILFS (loop5): discard dirty page: offset=188416, ino=12
WARNING: CPU: 1 PID: 8008 at fs/buffer.c:1149 mark_buffer_dirty+0x347/0x480 fs/buffer.c:1149
Kernel panic - not syncing: kernel: panic_on_warn set ...

NILFS (loop5): discard dirty block: blocknr=0, size=1024
CPU: 1 PID: 8008 Comm: syz-executor.0 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x21d/0x451 kernel/panic.c:247
 check_panic_on_warn.cold+0x19/0x35 kernel/panic.c:171
NILFS (loop5): discard dirty block: blocknr=0, size=1024
 __warn+0xdf/0x1e0 kernel/panic.c:603
 report_bug+0x208/0x250 lib/bug.c:183
NILFS (loop5): discard dirty block: blocknr=0, size=1024
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967
RIP: 0010:mark_buffer_dirty+0x347/0x480 fs/buffer.c:1149
RSP: 0018:ffff8880b10379b8 EFLAGS: 00010297
NILFS (loop5): discard dirty block: blocknr=0, size=1024
RAX: ffff88809d7e6300 RBX: ffff8880635821f8 RCX: 0000000000001e79
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880635821f8
RBP: ffff8880634f3898 R08: ffffffff8b9b4f48 R09: 0000000000040831
R10: ffff88809d7e6bd8 R11: ffff88809d7e6300 R12: dffffc0000000000
R13: ffff8880a01e5378 R14: ffff8880635821f8 R15: ffff8880634f38a8
 nilfs_segctor_collect_dirty_files fs/nilfs2/segment.c:1979 [inline]
 nilfs_segctor_do_construct+0x2af/0x79c0 fs/nilfs2/segment.c:2038
NILFS (loop3): discard dirty block: blocknr=9, size=1024
 nilfs_segctor_construct+0x6db/0x8e0 fs/nilfs2/segment.c:2394
 nilfs_segctor_write_out fs/nilfs2/segment.c:2717 [inline]
 nilfs_segctor_destroy fs/nilfs2/segment.c:2750 [inline]
 nilfs_detach_log_writer+0x398/0x980 fs/nilfs2/segment.c:2830
NILFS (loop3): discard dirty page: offset=0, ino=5
 nilfs_put_super+0x3f/0x190 fs/nilfs2/super.c:489
 generic_shutdown_super+0x144/0x370 fs/super.c:446
 kill_block_super+0x95/0xe0 fs/super.c:1161
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 deactivate_super+0x7f/0xa0 fs/super.c:350
 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
NILFS (loop3): discard dirty block: blocknr=11, size=1024
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fed45fe6567
NILFS (loop3): discard dirty block: blocknr=18446744073709551615, size=1024
RSP: 002b:00007ffd79329298 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fed45fe6567
RDX: 00007ffd7932936b RSI: 000000000000000a RDI: 00007ffd79329360
RBP: 00007ffd79329360 R08: 00000000ffffffff R09: 00007ffd79329130
R10: 00005555558fd903 R11: 0000000000000246 R12: 00007fed4603fb24
R13: 00007ffd7932a420 R14: 00005555558fd810 R15: 00007ffd7932a460
Kernel Offset: disabled
Rebooting in 86400 seconds..