------------[ cut here ]------------ WARNING: CPU: 1 PID: 1885 at fs/direct-io.c:293 dio_complete+0x578/0x800 fs/direct-io.c:293 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 1885 Comm: syz-executor756 Not tainted 4.14.85+ #15 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 panic+0x1bf/0x3a4 kernel/panic.c:181 __warn.cold.7+0x2f/0x35 kernel/panic.c:542 report_bug+0x1f7/0x26c lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:177 [inline] do_error_trap+0x1ba/0x2c0 arch/x86/kernel/traps.c:295 invalid_op+0x18/0x40 arch/x86/entry/entry_64.S:944 RIP: 0010:dio_complete+0x578/0x800 fs/direct-io.c:293 RSP: 0018:ffff8881c53b7070 EFLAGS: 00010297 RAX: ffff8881ce1b4680 RBX: ffff8881cf1af740 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881ce1b46a4 RBP: 0000000000010000 R08: 1ffff11021ee8c00 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881c4026508 R13: 0000000000010000 R14: 0000000000000002 R15: ffff8881cf1af7d8 do_blockdev_direct_IO fs/direct-io.c:1373 [inline] __blockdev_direct_IO+0x7614/0xc4e0 fs/direct-io.c:1399 ext4_direct_IO_write fs/ext4/inode.c:3710 [inline] ext4_direct_IO+0x905/0x27f0 fs/ext4/inode.c:3863 generic_file_direct_write+0x225/0x430 mm/filemap.c:2940 __generic_file_write_iter+0x213/0x540 mm/filemap.c:3119 ext4_file_write_iter+0x4f6/0xe20 fs/ext4/file.c:264 call_write_iter include/linux/fs.h:1784 [inline] do_iter_readv_writev+0x3a4/0x560 fs/read_write.c:678 do_iter_write+0x156/0x530 fs/read_write.c:957 vfs_iter_write+0x70/0xa0 fs/read_write.c:970 iter_file_splice_write+0x5b4/0xab0 fs/splice.c:749 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x116/0x160 fs/splice.c:1018 splice_direct_to_actor+0x28c/0x750 fs/splice.c:973 do_splice_direct+0x17b/0x220 fs/splice.c:1061 do_sendfile+0x4a1/0xb50 fs/read_write.c:1438 SYSC_sendfile64 fs/read_write.c:1499 [inline] SyS_sendfile64+0x11f/0x140 fs/read_write.c:1485 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x446609 RSP: 002b:00007f0597498da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000446609 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 R10: 00008000fffffffe R11: 0000000000000246 R12: 00000000006dbc4c R13: 0000040000006100 R14: 00008000fffffffe R15: 0000000000000000 Kernel Offset: 0x11200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) Rebooting in 86400 seconds..