Page cache invalidation failure on direct I/O.  Possible data corruption due to collision with buffered I/O!
File: /root/bus PID: 8184 Comm: syz-executor756
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WARNING: CPU: 0 PID: 8207 at fs/ext4/inode.c:3892 ext4_set_page_dirty+0xe8/0x130 fs/ext4/inode.c:3892
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8207 Comm: syz-executor756 Not tainted 4.14.266-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:183
 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:964
RIP: 0010:ext4_set_page_dirty+0xe8/0x130 fs/ext4/inode.c:3892
RSP: 0018:ffff8880b2b37a58 EFLAGS: 00010297
RAX: ffff8880998c2340 RBX: ffffea00022fcec0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffea00022fcee0
RBP: ffffea00022fcec0 R08: 0000000000000001 R09: ffffed10117e77ff
R10: ffff88808bf3bfff R11: 0000000000000000 R12: ffffea000244afa0
R13: ffffea000244afa0 R14: dffffc0000000000 R15: ffffea00022fcec0
 set_page_dirty+0x148/0x2a0 mm/page-writeback.c:2586
 set_page_dirty_lock+0x61/0xa0 mm/page-writeback.c:2611
 process_vm_rw_pages mm/process_vm_access.c:51 [inline]
 process_vm_rw_single_vec mm/process_vm_access.c:124 [inline]
 process_vm_rw_core.constprop.0+0x4a1/0xa40 mm/process_vm_access.c:223
 process_vm_rw+0x1c2/0x1f0 mm/process_vm_access.c:290
 SYSC_process_vm_writev mm/process_vm_access.c:312 [inline]
 SyS_process_vm_writev+0x39/0x50 mm/process_vm_access.c:307
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f643df46b29
RSP: 002b:00007f643ded72f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000137
RAX: ffffffffffffffda RBX: 00007f643dfce438 RCX: 00007f643df46b29
RDX: 0000000000000001 RSI: 0000000020c22000 RDI: 000000000000200f
RBP: 00007f643dfce430 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000020c22fa0 R11: 0000000000000246 R12: 00007f643dfce43c
R13: 00007f643df9c074 R14: 65732f636f72702f R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..