------------[ cut here ]------------ WARNING: CPU: 0 PID: 4817 at fs/ext4/inode.c:3327 ext4_ext_direct_IO fs/ext4/inode.c:3327 [inline]() WARNING: CPU: 0 PID: 4817 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: 0 PID: 4817 Comm: syz-executor.5 Not tainted 4.4.174+ #17 0000000000000000 de4df25092da3c19 ffff8800b95af4e8 ffffffff81aad1a1 0000000000000000 ffffffff82835ee0 ffffffff828bfa40 0000000000000cff ffffffff816417cd ffff8800b95af5c8 ffffffff813a48c2 0000000041b58ab3 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [] panic+0x1b9/0x37b kernel/panic.c:112 [] warn_slowpath_common kernel/panic.c:455 [inline] [] warn_slowpath_common.cold+0x20/0x20 kernel/panic.c:435 [] warn_slowpath_null+0x2a/0x30 kernel/panic.c:492 [] ext4_ext_direct_IO fs/ext4/inode.c:3327 [inline] [] ext4_direct_IO+0x226d/0x2a80 fs/ext4/inode.c:3405 [] generic_file_direct_write+0x276/0x4f0 mm/filemap.c:2493 [] __generic_file_write_iter+0x245/0x540 mm/filemap.c:2673 [] ext4_file_write_iter+0x9ec/0xc70 fs/ext4/file.c:171 [] aio_run_iocb+0x4ff/0x6f0 fs/aio.c:1477 [] io_submit_one fs/aio.c:1579 [inline] [] do_io_submit+0x639/0xf10 fs/aio.c:1637 [] C_SYSC_io_submit fs/compat.c:651 [inline] [] compat_SyS_io_submit+0xe4/0x140 fs/compat.c:636 [] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] [] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397 [] sysenter_flags_fixed+0xd/0x1a Kernel Offset: disabled Rebooting in 86400 seconds..