------------[ cut here ]------------
WARNING: CPU: 0 PID: 8597 at fs/overlayfs/dir.c:212 ovl_create_real+0x272/0x520 fs/overlayfs/dir.c:212
Modules linked in:
CPU: 0 PID: 8597 Comm: syz-executor.2 Not tainted 5.14.0-rc7-next-20210827-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ovl_create_real+0x272/0x520 fs/overlayfs/dir.c:212
Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 80 02 00 00 49 83 7c 24 68 00 0f 85 7a fe ff ff e8 de d8 c2 fe <0f> 0b 4c 89 e5 49 c7 c4 fb ff ff ff e9 57 fe ff ff 66 81 eb 00 10
RSP: 0018:ffffc900113b7958 EFLAGS: 00010212
RAX: 00000000000266fe RBX: 0000000000004000 RCX: ffffc9000d42f000
RDX: 0000000000040000 RSI: ffffffff82b33092 RDI: ffff888071c8fdc8
RBP: ffff888071c8fd60 R08: 0000000000000000 R09: ffff88801f5d87d7
R10: ffffffff82b3311b R11: 0000000000000000 R12: ffff888071c8fd60
R13: 0000000000004000 R14: ffff8880733fa370 R15: ffff8880733fa450
FS:  00007f8fe574f700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0b49691018 CR3: 0000000030318000 CR4: 00000000001506f0
Call Trace:
 ovl_workdir_create+0x3a9/0x5b0 fs/overlayfs/super.c:790
 ovl_make_workdir fs/overlayfs/super.c:1364 [inline]
 ovl_get_workdir fs/overlayfs/super.c:1511 [inline]
 ovl_fill_super+0x199a/0x5fb0 fs/overlayfs/super.c:2067
 mount_nodev+0x60/0x110 fs/super.c:1414
 legacy_get_tree+0x105/0x220 fs/fs_context.c:610
 vfs_get_tree+0x89/0x2f0 fs/super.c:1498
 do_new_mount fs/namespace.c:2988 [inline]
 path_mount+0x1320/0x1fa0 fs/namespace.c:3318
 do_mount fs/namespace.c:3331 [inline]
 __do_sys_mount fs/namespace.c:3539 [inline]
 __se_sys_mount fs/namespace.c:3516 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3516
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8fe574f188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000020000100 RSI: 0000000020000000 RDI: 0000000000400002
RBP: 00000000004bfcc4 R08: 0000000020000400 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffc202624bf R14: 00007f8fe574f300 R15: 0000000000022000