------------[ cut here ]------------
WARNING: CPU: 1 PID: 25814 at fs/overlayfs/file.c:66 ovl_change_flags fs/overlayfs/file.c:66 [inline]
WARNING: CPU: 1 PID: 25814 at fs/overlayfs/file.c:66 ovl_real_fdget_meta+0x49c/0x530 fs/overlayfs/file.c:117
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 25814 Comm: syz-executor.5 Not tainted 5.6.0-next-20200407-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:175 [inline]
 fixup_bug arch/x86/kernel/traps.c:170 [inline]
 do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:ovl_change_flags fs/overlayfs/file.c:66 [inline]
RIP: 0010:ovl_real_fdget_meta+0x49c/0x530 fs/overlayfs/file.c:117
Code: ff 4c 89 ff e8 25 bc 2d ff e9 ff fc ff ff e8 1b bc 2d ff e9 c5 fc ff ff 4c 89 f7 e8 7e bc 2d ff e9 5d fd ff ff e8 e4 b2 ef fe <0f> 0b 41 bd fb ff ff ff e9 fd fc ff ff e8 02 bc 2d ff e9 84 fb ff
RSP: 0018:ffffc9000737fdd0 EFLAGS: 00010206
RAX: 0000000000040000 RBX: 0000000000002000 RCX: ffffc90013fcd000
RDX: 0000000000000040 RSI: ffffffff828383ec RDI: 0000000000000005
RBP: 0000000004048001 R08: ffff888037698240 R09: fffffbfff15125a1
R10: ffffffff8a892d07 R11: fffffbfff15125a0 R12: ffff88809a7fea80
R13: ffff8880868425b8 R14: 000000000000a001 R15: ffff88809a7feb00
 ovl_fsync+0x8f/0x220 fs/overlayfs/file.c:422
 vfs_fsync_range+0x138/0x220 fs/sync.c:197
 vfs_fsync fs/sync.c:211 [inline]
 do_fsync+0x4d/0x90 fs/sync.c:221
 __do_sys_fdatasync fs/sync.c:234 [inline]
 __se_sys_fdatasync fs/sync.c:232 [inline]
 __x64_sys_fdatasync+0x32/0x40 fs/sync.c:232
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c889
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa8f1832c78 EFLAGS: 00000246 ORIG_RAX: 000000000000004b
RAX: ffffffffffffffda RBX: 00007fa8f18336d4 RCX: 000000000045c889
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000000c6 R14: 00000000004c356f R15: 000000000076bfac
Kernel Offset: disabled
Rebooting in 86400 seconds..