8<--- cut here ---
Unable to handle kernel NULL pointer dereference at virtual address 00000008 when read
[00000008] *pgd=84778003, *pmd=fe4c8003
Internal error: Oops: 205 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 1 UID: 0 PID: 10106 Comm: syz.0.1075 Not tainted 6.10.0-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at path_from_stashed+0x1c/0x308 fs/libfs.c:2204
LR is at open_namespace+0x44/0xbc fs/nsfs.c:102
pc : [<8053a94c>]    lr : [<8054d0e8>]    psr: 80000013
sp : dfde5e80  ip : 84acd400  fp : dfde5ec4
r10: 84acd400  r9 : 00000005  r8 : 849420c0
r7 : 82cab250  r6 : 84acd400  r5 : 00000000  r4 : 83eaadc0
r3 : dfde5ecc  r2 : 00000008  r1 : 82c99800  r0 : 00000008
Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 30c5387d  Table: 850ce1c0  DAC: 00000000
Register r0 information: non-paged memory
Register r1 information: slab kmalloc-1k start 82c99800 pointer offset 0 size 1024
Register r2 information: non-paged memory
Register r3 information: 2-page vmalloc region starting at 0xdfde4000 allocated at kernel_clone+0xac/0x3e4 kernel/fork.c:2781
Register r4 information: slab anon_vma_chain start 83eaadc0 pointer offset 0 size 40
Register r5 information: NULL pointer
Register r6 information: slab task_struct start 84acd400 pointer offset 0 size 3072
Register r7 information: slab mnt_cache start 82cab240 pointer offset 16 size 184
Register r8 information: slab filp start 849420c0 pointer offset 0 size 160
Register r9 information: non-paged memory
Register r10 information: slab task_struct start 84acd400 pointer offset 0 size 3072
Register r11 information: 2-page vmalloc region starting at 0xdfde4000 allocated at kernel_clone+0xac/0x3e4 kernel/fork.c:2781
Register r12 information: slab task_struct start 84acd400 pointer offset 0 size 3072
Process syz.0.1075 (pid: 10106, stack limit = 0xdfde4000)
Stack: (0xdfde5e80 to 0xdfde6000)
5e80: 80551fd8 84acd400 dfde5ebc dfde5e98 8027c9dc 802ac4a4 00000000 83eaadc0
5ea0: 00000000 84acd400 84936880 849420c0 00000005 84acd400 dfde5ef4 dfde5ec8
5ec0: 8054d0e8 8053a93c dfde5ef4 00000000 00000000 3f53de76 83eaadc0 83eaadc0
5ee0: 84936000 00000008 dfde5f14 dfde5ef8 80552110 8054d0b0 0000ff07 00000000
5f00: 849420c0 00000000 dfde5fa4 dfde5f18 8051a1e8 80551f98 84acd400 00000001
5f20: ecac8b10 84acd400 dfde5f44 dfde5f38 8190dd14 8190dbe4 dfde5f5c dfde5f48
5f40: 8024b594 8027af5c 40000000 dfde5fb0 dfde5f84 dfde5f60 80202dd8 8024b550
5f60: 8261c90c dfde5fb0 0014b0d0 ecac8b10 80202cc0 3f53de76 dfde5fac 00000000
5f80: 00000000 002662e0 00000036 8020029c 84acd400 00000036 00000000 dfde5fa8
5fa0: 80200060 8051a0c0 00000000 00000000 00000005 0000ff07 00000000 00000000
5fc0: 00000000 00000000 002662e0 00000036 7ecd8766 7ecd8767 003d0f00 76be10bc
5fe0: 76be0ec8 76be0eb8 00018258 00130c20 60000010 00000005 00000000 00000000
Call trace: 
[<8053a930>] (path_from_stashed) from [<8054d0e8>] (open_namespace+0x44/0xbc fs/nsfs.c:102)
 r10:84acd400 r9:00000005 r8:849420c0 r7:84936880 r6:84acd400 r5:00000000
 r4:83eaadc0
[<8054d0a4>] (open_namespace) from [<80552110>] (pidfd_ioctl+0x184/0x4c4 fs/pidfs.c:196)
 r6:00000008 r5:84936000 r4:83eaadc0
[<80551f8c>] (pidfd_ioctl) from [<8051a1e8>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80551f8c>] (pidfd_ioctl) from [<8051a1e8>] (do_vfs_ioctl fs/ioctl.c:861 [inline])
[<80551f8c>] (pidfd_ioctl) from [<8051a1e8>] (__do_sys_ioctl fs/ioctl.c:905 [inline])
[<80551f8c>] (pidfd_ioctl) from [<8051a1e8>] (sys_ioctl+0x134/0xda4 fs/ioctl.c:893)
 r7:00000000 r6:849420c0 r5:00000000 r4:0000ff07
[<8051a0b4>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xdfde5fa8 to 0xdfde5ff0)
5fa0:                   00000000 00000000 00000005 0000ff07 00000000 00000000
5fc0: 00000000 00000000 002662e0 00000036 7ecd8766 7ecd8767 003d0f00 76be10bc
5fe0: 76be0ec8 76be0eb8 00018258 00130c20
 r10:00000036 r9:84acd400 r8:8020029c r7:00000036 r6:002662e0 r5:00000000
 r4:00000000
Code: e24dd01c e1a07001 e5911004 ee1dcf70 (e5905000) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	e24dd01c 	sub	sp, sp, #28
   4:	e1a07001 	mov	r7, r1
   8:	e5911004 	ldr	r1, [r1, #4]
   c:	ee1dcf70 	mrc	15, 0, ip, cr13, cr0, {3}
* 10:	e5905000 	ldr	r5, [r0] <-- trapping instruction