overlayfs: at least 2 lowerdir are needed while upperdir nonexistent
No such timeout policy "syz1"
read_mapping_page failed!
ERROR: (device loop1): txAbort: 
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9149 at fs/inode.c:474 inc_nlink+0x120/0x170 fs/inode.c:474
Modules linked in:
CPU: 0 UID: 0 PID: 9149 Comm: syz.1.638 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : inc_nlink+0x120/0x170 fs/inode.c:474
lr : inc_nlink+0x120/0x170 fs/inode.c:474
sp : ffff8000a44d6fa0
x29: ffff8000a44d6fa0 x28: ffff70001489ae04 x27: dfff800000000000
x26: 1ffff00011f78d68 x25: 0000000000000000 x24: ffff80008fbc6000
x23: 1fffe0001f18c892 x22: dfff800000000000 x21: 0000000000004070
x20: ffff0000f8c64448 x19: ffff0000f8c64490 x18: 00000000ffffffff
x17: ffff800093335000 x16: ffff800082defcc0 x15: 0000000000000001
x14: 1fffe0001f18ca58 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 000000000000962f x9 : ffff8000a4cdb000
x8 : 0000000000009630 x7 : ffff800081c50c14 x6 : 0000000000000000
x5 : 0000000000000000 x4 : ffff8000a44d6da8 x3 : ffff800081bef96c
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 inc_nlink+0x120/0x170 fs/inode.c:474 (P)
 jfs_mkdir+0x664/0x8b4 fs/jfs/namei.c:286
 vfs_mkdir+0x284/0x424 fs/namei.c:4453
 ovl_do_mkdir fs/overlayfs/overlayfs.h:251 [inline]
 ovl_workdir_create+0x3a0/0x6f4 fs/overlayfs/super.c:340
 ovl_make_workdir fs/overlayfs/super.c:679 [inline]
 ovl_get_workdir+0x2b4/0x1270 fs/overlayfs/super.c:837
 ovl_fill_super+0x10d8/0x3118 fs/overlayfs/super.c:1468
 vfs_get_super fs/super.c:1331 [inline]
 get_tree_nodev+0xb4/0x144 fs/super.c:1350
 ovl_get_tree+0x28/0x38 fs/overlayfs/params.c:708
 vfs_get_tree+0x90/0x28c fs/super.c:1758
 fc_mount fs/namespace.c:1199 [inline]
 do_new_mount_fc fs/namespace.c:3642 [inline]
 do_new_mount+0x284/0x944 fs/namespace.c:3718
 path_mount+0x5b4/0xdfc fs/namespace.c:4028
 do_mount fs/namespace.c:4041 [inline]
 __do_sys_mount fs/namespace.c:4229 [inline]
 __se_sys_mount fs/namespace.c:4206 [inline]
 __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4206
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 50708
hardirqs last  enabled at (50707): [<ffff800080c8703c>] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234
hardirqs last disabled at (50708): [<ffff80008adf99f4>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412
softirqs last  enabled at (50486): [<ffff8000801f96d0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (50484): [<ffff8000801f969c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
overlayfs: upper fs needs to support d_type.
overlayfs: upper fs does not support tmpfile.
overlayfs: upper fs does not support RENAME_WHITEOUT.
ERROR: (device loop1): dbAlloc: the hint is outside the map

overlayfs: failed to set uuid (/file0, err=-5); falling back to uuid=null.
ERROR: (device loop1): dbAlloc: the hint is outside the map

overlayfs: failed to verify upper root origin