Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 0 UID: 0 PID: 5996 Comm: kworker/u8:10 Not tainted 6.15.0-rc1-syzkaller-00301-g3bde70a2c827 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: netns cleanup_net
RIP: 0010:dst_dev_put+0x27/0x290 net/core/dst.c:146
Code: 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 49 89 fd 49 bf 00 00 00 00 00 fc ff df e8 a0 1b d3 f7 4d 89 ec 49 c1 ec 03 <43> 80 3c 3c 00 74 08 4c 89 ef e8 1a 43 3d f8 4d 8b 75 00 49 8d 7d
RSP: 0018:ffffc90000007b18 EFLAGS: 00010212
RAX: ffffffff89f03990 RBX: 0000000000000010 RCX: ffff888050371e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000010
RBP: 1ffffffff1cf3264 R08: ffffffff8a9b12d9 R09: 1ffff110062024c1
R10: dffffc0000000000 R11: ffffed10062024c2 R12: 0000000000000002
R13: 0000000000000010 R14: 00000000fffffff8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888124f94000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc4b2c5048 CR3: 000000000eb38000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:195 [inline]
 fib_nh_common_release+0x1fc/0x420 net/ipv4/fib_semantics.c:206
 fib6_info_destroy_rcu+0xc0/0x1b0 net/ipv6/ip6_fib.c:177
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xaae/0x17a0 kernel/rcu/tree.c:2824
 handle_softirqs+0x2d8/0x9b0 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:stack_trace_consume_entry+0xf5/0x280 kernel/stacktrace.c:93
Code: 00 fc ff df 48 8b 1b 45 8d 70 01 41 0f b6 04 17 84 c0 0f 85 31 01 00 00 45 89 31 4a 8d 1c c3 48 89 d8 48 c1 e8 03 80 3c 10 00 <74> 1a 4d 89 cf 48 89 df 49 89 d6 49 89 f5 e8 f8 93 7e 00 4d 89 f9
RSP: 0018:ffffc90004836f50 EFLAGS: 00000246
RAX: 1ffff92000906e33 RBX: ffffc90004837198 RCX: ffffffff91bfe000
RDX: dffffc0000000000 RSI: ffffffff816278fd RDI: ffffc9000483708c
RBP: ffffc90004837088 R08: 000000000000000d R09: ffffc90004837090
R10: dffffc0000000000 R11: ffffffff81aee8b0 R12: 1ffff92000906e11
R13: 1ffff92000906e11 R14: 000000000000000e R15: 1ffff92000906e12
 arch_stack_walk+0x112/0x150 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
 kasan_record_aux_stack+0xbf/0xd0 mm/kasan/generic.c:548
 kvfree_call_rcu+0xac/0x3f0 mm/slab_common.c:1962
 in6_ifa_put include/net/addrconf.h:456 [inline]
 addrconf_ifdown+0x1372/0x1b10 net/ipv6/addrconf.c:3990
 addrconf_notify+0x3cb/0x1020 net/ipv6/addrconf.c:-1
 notifier_call_chain+0x1a7/0x3f0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2212 [inline]
 call_netdevice_notifiers net/core/dev.c:2226 [inline]
 dev_close_many+0x33e/0x4c0 net/core/dev.c:1729
 unregister_netdevice_many_notify+0x628/0x2510 net/core/dev.c:11940
 unregister_netdevice_many net/core/dev.c:12035 [inline]
 default_device_exit_batch+0x7ff/0x880 net/core/dev.c:12527
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x8b1/0xd60 net/core/net_namespace.c:654
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac5/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd50 kernel/workqueue.c:3400
 kthread+0x7b9/0x940 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
 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+0x27/0x290 net/core/dst.c:146
Code: 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 49 89 fd 49 bf 00 00 00 00 00 fc ff df e8 a0 1b d3 f7 4d 89 ec 49 c1 ec 03 <43> 80 3c 3c 00 74 08 4c 89 ef e8 1a 43 3d f8 4d 8b 75 00 49 8d 7d
RSP: 0018:ffffc90000007b18 EFLAGS: 00010212
RAX: ffffffff89f03990 RBX: 0000000000000010 RCX: ffff888050371e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000010
RBP: 1ffffffff1cf3264 R08: ffffffff8a9b12d9 R09: 1ffff110062024c1
R10: dffffc0000000000 R11: ffffed10062024c2 R12: 0000000000000002
R13: 0000000000000010 R14: 00000000fffffff8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888124f94000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc4b2c5048 CR3: 000000000eb38000 CR4: 0000000000350ef0
----------------
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:	49 89 fd             	mov    %rdi,%r13
  14:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
  1b:	fc ff df
  1e:	e8 a0 1b d3 f7       	call   0xf7d31bc3
  23:	4d 89 ec             	mov    %r13,%r12
  26:	49 c1 ec 03          	shr    $0x3,%r12
* 2a:	43 80 3c 3c 00       	cmpb   $0x0,(%r12,%r15,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ef             	mov    %r13,%rdi
  34:	e8 1a 43 3d f8       	call   0xf83d4353
  39:	4d 8b 75 00          	mov    0x0(%r13),%r14
  3d:	49                   	rex.WB
  3e:	8d                   	.byte 0x8d
  3f:	7d                   	.byte 0x7d