------------[ cut here ]------------ WARNING: CPU: 1 PID: 9912 at fs/ext4/inode.c:3327 ext4_ext_direct_IO fs/ext4/inode.c:3327 [inline]() WARNING: CPU: 1 PID: 9912 at fs/ext4/inode.c:3327 ext4_direct_IO+0x22bc/0x2a60 fs/ext4/inode.c:3405() Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 9912 Comm: syz-executor2 Not tainted 4.4.155+ #34 0000000000000000 63b8afe30046bc34 ffff8801d8587500 ffffffff81a556dd ffffffff82835440 ffff8801c2215f00 ffffffff828beb80 0000000000000009 0000000000000cff ffff8801d85875c0 ffffffff8138af64 0000000041b58ab3 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] panic+0x19e/0x359 kernel/panic.c:112 [] warn_slowpath_common.cold.6+0x20/0x20 kernel/panic.c:455 [] warn_slowpath_null+0x29/0x30 kernel/panic.c:492 [] ext4_ext_direct_IO fs/ext4/inode.c:3327 [inline] [] ext4_direct_IO+0x22bc/0x2a60 fs/ext4/inode.c:3405 [] generic_file_direct_write+0x267/0x4e0 mm/filemap.c:2493 [] __generic_file_write_iter+0x254/0x550 mm/filemap.c:2673 [] ext4_file_write_iter+0x966/0xc80 fs/ext4/file.c:171 [] aio_run_iocb+0x511/0x700 fs/aio.c:1475 [] io_submit_one fs/aio.c:1577 [inline] [] do_io_submit+0x5b7/0xe50 fs/aio.c:1635 [] C_SYSC_io_submit fs/compat.c:651 [inline] [] compat_SyS_io_submit+0xe3/0x130 fs/compat.c:636 [] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline] [] do_fast_syscall_32+0x31e/0x8b0 arch/x86/entry/common.c:460 [] sysenter_flags_fixed+0xd/0x1a Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..