BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1e572f067 P4D 1e572f067 PUD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1644 Comm: syz.2.336 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09cf0 EFLAGS: 00010206
RAX: ffffffff8150a590 RBX: 0000000000000100 RCX: ffff8881cac9cec0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e3a731c0
RBP: ffff8881f6f09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: 00000000ffffa500
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e3a731c0
FS:  00007f31ae6ef6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e1846000 CR4: 00000000003406a0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_timer_fn+0x3c/0x380 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x81d/0xb60 kernel/time/timer.c:1817
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x236/0x660 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x197/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:539 [inline]
 smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:__slab_alloc+0x6b/0xa0 mm/slub.c:2709
Code: 41 89 c5 83 f8 08 73 40 4e 03 24 ed 10 7f 43 85 4c 89 ff 44 89 f6 48 8b 55 c0 4c 89 e1 e8 4d d8 ff ff 48 89 5d b8 ff 75 b8 9d <65> 48 8b 0c 25 28 00 00 00 48 3b 4d d0 75 20 48 83 c4 20 5b 41 5c
RSP: 0018:ffff8881e85a7430 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: ffff8881e9052000 RBX: 0000000000000286 RCX: 002005e98188ffff
RDX: ffff8881e9054000 RSI: ffffea0007a41400 RDI: ffff8881f5c0c280
RBP: ffff8881e85a7478 R08: 0000000000000000 R09: 0000000080040004
R10: 00000000118c2d14 R11: 00000000d861fd53 R12: ffff8881f6f5b180
R13: 0000000000000001 R14: 0000000000000dc0 R15: ffff8881f5c0c280
 slab_alloc_node mm/slub.c:2792 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 __kmalloc+0x176/0x2f0 mm/slub.c:3909
 __kmalloc_node include/linux/slab.h:422 [inline]
 kmalloc_node include/linux/slab.h:599 [inline]
 kvmalloc_node+0x88/0xf0 mm/util.c:596
 kvmalloc include/linux/mm.h:761 [inline]
 kvmalloc_array include/linux/mm.h:779 [inline]
 __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:470 [inline]
 ptr_ring_init include/linux/ptr_ring.h:488 [inline]
 skb_array_init include/linux/skb_array.h:182 [inline]
 pfifo_fast_init+0x3af/0x7a0 net/sched/sch_generic.c:784
 qdisc_create_dflt+0x135/0x270 net/sched/sch_generic.c:944
 mq_init+0x2df/0x660 net/sched/sch_mq.c:90
 qdisc_create_dflt+0x135/0x270 net/sched/sch_generic.c:944
 attach_default_qdiscs net/sched/sch_generic.c:1113 [inline]
 dev_activate+0x132/0xc80 net/sched/sch_generic.c:1154
 __dev_open+0x2d3/0x3f0 net/core/dev.c:1335
 __dev_change_flags+0x20a/0x6a0 net/core/dev.c:7958
 dev_change_flags+0x88/0x1a0 net/core/dev.c:8029
 dev_ifsioc+0x110/0xa40 net/core/dev_ioctl.c:226
 dev_ioctl+0x550/0xb80 net/core/dev_ioctl.c:483
 sock_do_ioctl+0x235/0x330 net/socket.c:1081
 sock_ioctl+0x505/0x710 net/socket.c:1198
 do_vfs_ioctl+0x753/0x13f0 fs/ioctl.c:47
 ksys_ioctl fs/ioctl.c:742 [inline]
 __do_sys_ioctl fs/ioctl.c:749 [inline]
 __se_sys_ioctl fs/ioctl.c:747 [inline]
 __x64_sys_ioctl+0xe1/0x120 fs/ioctl.c:747
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f31b0086969
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f31ae6ef038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f31b02adfa0 RCX: 00007f31b0086969
RDX: 0000200000000080 RSI: 0000000000008914 RDI: 0000000000000008
RBP: 00007f31b0108ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f31b02adfa0 R15: 00007ffd5f17cbb8
Modules linked in:
CR2: 0000000000000000
---[ end trace 84f1588214f3ec2a ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09cf0 EFLAGS: 00010206
RAX: ffffffff8150a590 RBX: 0000000000000100 RCX: ffff8881cac9cec0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e3a731c0
RBP: ffff8881f6f09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: 00000000ffffa500
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e3a731c0
FS:  00007f31ae6ef6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e1846000 CR4: 00000000003406a0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	41 89 c5             	mov    %eax,%r13d
   3:	83 f8 08             	cmp    $0x8,%eax
   6:	73 40                	jae    0x48
   8:	4e 03 24 ed 10 7f 43 	add    -0x7abc80f0(,%r13,8),%r12
   f:	85
  10:	4c 89 ff             	mov    %r15,%rdi
  13:	44 89 f6             	mov    %r14d,%esi
  16:	48 8b 55 c0          	mov    -0x40(%rbp),%rdx
  1a:	4c 89 e1             	mov    %r12,%rcx
  1d:	e8 4d d8 ff ff       	call   0xffffd86f
  22:	48 89 5d b8          	mov    %rbx,-0x48(%rbp)
  26:	ff 75 b8             	push   -0x48(%rbp)
  29:	9d                   	popf
* 2a:	65 48 8b 0c 25 28 00 	mov    %gs:0x28,%rcx <-- trapping instruction
  31:	00 00
  33:	48 3b 4d d0          	cmp    -0x30(%rbp),%rcx
  37:	75 20                	jne    0x59
  39:	48 83 c4 20          	add    $0x20,%rsp
  3d:	5b                   	pop    %rbx
  3e:	41 5c                	pop    %r12