overlayfs: filesystem on './file1' not supported as upperdir
BUG: unable to handle page fault for address: fffffbfff5555559
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 21fff3067 P4D 21fff3067 PUD 21ffb6067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4659 Comm: syz-executor.3 Not tainted 5.4.35-syzkaller-00678-gc3c84f473434 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:file_inode include/linux/fs.h:1348 [inline]
RIP: 0010:fsnotify_open include/linux/fsnotify.h:266 [inline]
RIP: 0010:do_sys_open+0x3e4/0x7d0 fs/open.c:1111
Code: 00 48 89 5c 24 10 48 8d 7c 24 60 48 89 44 24 08 48 8d 58 20 ba 10 00 00 00 be aa 00 00 00 e8 c3 36 fc ff 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 bd 61 fc ff 44 89 74 24 24 48 8b
RSP: 0018:ffff8881c7c7fe00 EFLAGS: 00010a06
RAX: 1ffffffff5555559 RBX: ffffffffaaaaaaca RCX: 0000000000000000
RDX: 0000000000000010 RSI: 00000000000000aa RDI: ffff8881c7c7fe70
RBP: ffff8881c7c7ff10 R08: dffffc0000000000 R09: ffff8881c7c7fe60
R10: ffffed1038f8ffce R11: 0000000000000000 R12: 0000000000008241
R13: ffff8881c7d9c400 R14: 0000000000000006 R15: dffffc0000000000
FS:  00007f5ab21e0700(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff5555559 CR3: 00000001cb8c4003 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c829
Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f5ab21dfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00000000004db140 RCX: 000000000045c829
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000020000940
RBP: 000000000078c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000009a R14: 00000000004c3307 R15: 00007f5ab21e06d4
Modules linked in:
CR2: fffffbfff5555559
---[ end trace 61a6d771ea1c40b1 ]---
RIP: 0010:file_inode include/linux/fs.h:1348 [inline]
RIP: 0010:fsnotify_open include/linux/fsnotify.h:266 [inline]
RIP: 0010:do_sys_open+0x3e4/0x7d0 fs/open.c:1111
Code: 00 48 89 5c 24 10 48 8d 7c 24 60 48 89 44 24 08 48 8d 58 20 ba 10 00 00 00 be aa 00 00 00 e8 c3 36 fc ff 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 bd 61 fc ff 44 89 74 24 24 48 8b
RSP: 0018:ffff8881c7c7fe00 EFLAGS: 00010a06
RAX: 1ffffffff5555559 RBX: ffffffffaaaaaaca RCX: 0000000000000000
RDX: 0000000000000010 RSI: 00000000000000aa RDI: ffff8881c7c7fe70
RBP: ffff8881c7c7ff10 R08: dffffc0000000000 R09: ffff8881c7c7fe60
R10: ffffed1038f8ffce R11: 0000000000000000 R12: 0000000000008241
R13: ffff8881c7d9c400 R14: 0000000000000006 R15: dffffc0000000000
FS:  00007f5ab21e0700(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff5555559 CR3: 00000001cb8c4003 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400