------------[ cut here ]------------
WARNING: CPU: 1 PID: 8398 at fs/ext4/inode.c:3327 ext4_ext_direct_IO fs/ext4/inode.c:3327 [inline]()
WARNING: CPU: 1 PID: 8398 at fs/ext4/inode.c:3327 ext4_direct_IO+0x226d/0x2a80 fs/ext4/inode.c:3405()
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8398 Comm: syz-executor.2 Not tainted 4.4.174+ #17
 0000000000000000 049a927427933206 ffff8801c027f4e8 ffffffff81aad1a1
 0000000000000000 ffffffff82835ee0 ffffffff828bfa40 0000000000000cff
 ffffffff816417cd ffff8801c027f5c8 ffffffff813a48c2 0000000041b58ab3
Call Trace:
 [<ffffffff81aad1a1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81aad1a1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff813a48c2>] panic+0x1b9/0x37b kernel/panic.c:112
 [<ffffffff813a4ab9>] warn_slowpath_common kernel/panic.c:455 [inline]
 [<ffffffff813a4ab9>] warn_slowpath_common.cold+0x20/0x20 kernel/panic.c:435
 [<ffffffff810d3aaa>] warn_slowpath_null+0x2a/0x30 kernel/panic.c:492
 [<ffffffff816417cd>] ext4_ext_direct_IO fs/ext4/inode.c:3327 [inline]
 [<ffffffff816417cd>] ext4_direct_IO+0x226d/0x2a80 fs/ext4/inode.c:3405
 [<ffffffff813bcae6>] generic_file_direct_write+0x276/0x4f0 mm/filemap.c:2493
 [<ffffffff813bcfa5>] __generic_file_write_iter+0x245/0x540 mm/filemap.c:2673
 [<ffffffff81633d3c>] ext4_file_write_iter+0x9ec/0xc70 fs/ext4/file.c:171
 [<ffffffff8157fdcf>] aio_run_iocb+0x4ff/0x6f0 fs/aio.c:1477
 [<ffffffff81584279>] io_submit_one fs/aio.c:1579 [inline]
 [<ffffffff81584279>] do_io_submit+0x639/0xf10 fs/aio.c:1637
 [<ffffffff81598244>] C_SYSC_io_submit fs/compat.c:651 [inline]
 [<ffffffff81598244>] compat_SyS_io_submit+0xe4/0x140 fs/compat.c:636
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] sysenter_flags_fixed+0xd/0x1a
Kernel Offset: disabled
Rebooting in 86400 seconds..