Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
  ESR = 0x0000000086000006
  EC = 0x21: IABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
user pgtable: 4k pages, 48-bit VAs, pgdp=0000000123180000
[0000000000000000] pgd=0800000127937003, p4d=0800000127937003, pud=0800000132bf2003, pmd=0000000000000000
Internal error: Oops: 0000000086000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 5740 Comm: syz.8.229 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : 0x0
lr : __lookup_slow+0x250/0x388 fs/namei.c:1663
sp : ffff800020e76ae0
x29: ffff800020e76bc0 x28: 0000000010000000 x27: 1fffe0001e08082f
x26: dfff800000000000 x25: ffff7000041ced60 x24: ffff800020e76b20
x23: ffff0000e8cd4018 x22: ffff800020e76c40 x21: ffff800011d46400
x20: 0000000000000000 x19: ffff0000f0404178 x18: ffff800020e76640
x17: 0000000000000000 x16: ffff800011b4c298 x15: 0000000000000004
x14: 0000000063cb8519 x13: dfff800000000000 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff0000cd0151c0
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff800017a61fe0 x4 : 0000000000000000 x3 : ffff8000089e2334
x2 : 0000000000000000 x1 : ffff0000f0404178 x0 : ffff0000e8cd4018
Call trace:
 0x0
 lookup_slow fs/namei.c:1680 [inline]
 lookup_one_unlocked+0x144/0x254 fs/namei.c:2779
 lookup_one_len_unlocked+0x3c/0x50 fs/namei.c:2833
 ovl_lookup_positive_unlocked fs/overlayfs/namei.c:205 [inline]
 ovl_lookup_single+0x84/0x6c4 fs/overlayfs/namei.c:230
 ovl_lookup_layer+0x368/0x454 fs/overlayfs/namei.c:314
 ovl_lookup+0x840/0x1928 fs/overlayfs/namei.c:914
 lookup_open fs/namei.c:3440 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0xd9c/0x26cc fs/namei.c:3739
 do_filp_open+0x1a8/0x3b4 fs/namei.c:3769
 file_open_name fs/open.c:1198 [inline]
 filp_open+0x1f4/0x258 fs/open.c:1218
 do_coredump+0x1d18/0x2890 fs/coredump.c:767
 get_signal+0x3dc/0x1550 kernel/signal.c:2886
 do_signal arch/arm64/kernel/signal.c:890 [inline]
 do_notify_resume+0x320/0x32b8 arch/arm64/kernel/signal.c:943
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: bad PC value
---[ end trace 2127f3b9d1d4b5f6 ]---