Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 1 UID: 0 PID: 6026 Comm: kworker/u8:20 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:dst_dev_put+0x27/0x2b0 net/core/dst.c:147
Code: 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 e0 39 20 f8 49 89 dd 49 c1 ed 03 <43> 80 7c 25 00 00 74 08 48 89 df e8 09 c5 8d f8 4c 8b 33 48 8d 7b
RSP: 0000:ffffc90000a08d48 EFLAGS: 00010202
RAX: ffffffff89a637a0 RBX: 0000000000000020 RCX: ffff88807ca03e00
RDX: 0000000000000100 RSI: 0000000000000008 RDI: 0000000000000020
RBP: dffffc0000000000 R08: ffffe8ffffd5e00f R09: 1ffffd1ffffabc01
R10: dffffc0000000000 R11: fffff91ffffabc02 R12: dffffc0000000000
R13: 0000000000000004 R14: 0000607edad06008 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125058000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f833033f790 CR3: 0000000053b76000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 fib6_nh_release_dsts net/ipv6/route.c:3756 [inline]
 fib6_nh_release+0x33e/0x400 net/ipv6/route.c:3737
 fib6_info_destroy_rcu+0xca/0x1c0 net/ipv6/ip6_fib.c:177
 rcu_do_batch kernel/rcu/tree.c:2645 [inline]
 rcu_core+0x78b/0x10a0 kernel/rcu/tree.c:2897
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 do_softirq+0x76/0xd0 kernel/softirq.c:523
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 __alloc_skb+0x1ad/0x7a0 net/core/skbuff.c:699
 alloc_skb include/linux/skbuff.h:1384 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:819 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline]
 nsim_dev_trap_report_work+0x25f/0xb40 drivers/net/netdevsim/dev.c:922
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dst_dev_put+0x27/0x2b0 net/core/dst.c:147
Code: 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 e0 39 20 f8 49 89 dd 49 c1 ed 03 <43> 80 7c 25 00 00 74 08 48 89 df e8 09 c5 8d f8 4c 8b 33 48 8d 7b
RSP: 0000:ffffc90000a08d48 EFLAGS: 00010202
RAX: ffffffff89a637a0 RBX: 0000000000000020 RCX: ffff88807ca03e00
RDX: 0000000000000100 RSI: 0000000000000008 RDI: 0000000000000020
RBP: dffffc0000000000 R08: ffffe8ffffd5e00f R09: 1ffffd1ffffabc01
R10: dffffc0000000000 R11: fffff91ffffabc02 R12: dffffc0000000000
R13: 0000000000000004 R14: 0000607edad06008 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125058000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f833033f790 CR3: 0000000053b76000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	f3 0f 1e fa          	endbr64
   7:	55                   	push   %rbp
   8:	41 57                	push   %r15
   a:	41 56                	push   %r14
   c:	41 55                	push   %r13
   e:	41 54                	push   %r12
  10:	53                   	push   %rbx
  11:	48 89 fb             	mov    %rdi,%rbx
  14:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  1b:	fc ff df
  1e:	e8 e0 39 20 f8       	call   0xf8203a03
  23:	49 89 dd             	mov    %rbx,%r13
  26:	49 c1 ed 03          	shr    $0x3,%r13
* 2a:	43 80 7c 25 00 00    	cmpb   $0x0,0x0(%r13,%r12,1) <-- trapping instruction
  30:	74 08                	je     0x3a
  32:	48 89 df             	mov    %rbx,%rdi
  35:	e8 09 c5 8d f8       	call   0xf88dc543
  3a:	4c 8b 33             	mov    (%rbx),%r14
  3d:	48                   	rex.W
  3e:	8d                   	.byte 0x8d
  3f:	7b                   	.byte 0x7b