Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 35 Comm: kworker/u8:2 Not tainted 6.14.0-rc1-next-20250207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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 d0 b7 f9 f7 4d 89 ec 49 c1 ec 03 <43> 80 3c 3c 00 74 08 4c 89 ef e8 aa 93 60 f8 4d 8b 75 00 49 8d 7d
RSP: 0018:ffffc90000a18b38 EFLAGS: 00010247
RAX: ffffffff89c5d120 RBX: 0000000000000006 RCX: ffff888143ec1e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 1ffffffff1c6404a R08: ffffffff8a6e5bf9 R09: 1ffff11006465cc0
R10: dffffc0000000000 R11: ffffed1006465cc1 R12: 0000000000000000
R13: 0000000000000006 R14: 00000000fffffff8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fac14885ba8 CR3: 0000000025020000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:201 [inline]
 fib_nh_common_release+0x1fc/0x420 net/ipv4/fib_semantics.c:212
 fib6_info_destroy_rcu+0xc0/0x1b0 net/ipv6/ip6_fib.c:177
 rcu_do_batch kernel/rcu/tree.c:2546 [inline]
 rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2802
 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 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:check_preemption_disabled+0x42/0x120 lib/smp_processor_id.c:55
Code: 08 65 8b 1d 0c af 09 74 65 8b 05 01 af 09 74 a9 ff ff ff 7f 74 26 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 ce 00 00 00 <89> d8 48 83 c4 10 5b 41 5c 41 5e 41 5f c3 cc cc cc cc 48 c7 04 24
RSP: 0018:ffffc90000ab6928 EFLAGS: 00000246
RAX: ceb327664aba5b00 RBX: 0000000000000001 RCX: ffffffff819b0c40
RDX: 0000000000000000 RSI: ffffffff8c60ca00 RDI: ffffffff8c60c9c0
RBP: ffffc90000ab6ab8 R08: ffffffff901bb677 R09: 1ffffffff20376ce
R10: dffffc0000000000 R11: fffffbfff20376cf R12: 1ffff92000156d3c
R13: ffffffff816bc248 R14: ffffc90000ab7180 R15: dffffc0000000000
 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
 rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:716
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0xbf/0xa30 kernel/locking/lockdep.c:5862
 rcu_lock_release include/linux/rcupdate.h:347 [inline]
 rcu_read_unlock include/linux/rcupdate.h:880 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1164 [inline]
 unwind_next_frame+0x1a77/0x2380 arch/x86/kernel/unwind_orc.c:680
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4339
 kmalloc_noprof include/linux/slab.h:902 [inline]
 kzalloc_noprof include/linux/slab.h:1038 [inline]
 mld_add_delrec net/ipv6/mcast.c:746 [inline]
 igmp6_leave_group net/ipv6/mcast.c:2671 [inline]
 igmp6_group_dropped+0x3a6/0xef0 net/ipv6/mcast.c:726
 __ipv6_dev_mc_dec+0x2c1/0x370 net/ipv6/mcast.c:1018
 addrconf_leave_solict net/ipv6/addrconf.c:2252 [inline]
 __ipv6_ifa_notify+0x8af/0x1160 net/ipv6/addrconf.c:6278
 addrconf_ifdown+0xef0/0x1bd0 net/ipv6/addrconf.c:3973
 addrconf_notify+0x3cb/0x1020
 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2179 [inline]
 call_netdevice_notifiers net/core/dev.c:2193 [inline]
 dev_close_many+0x33c/0x4c0 net/core/dev.c:1717
 unregister_netdevice_many_notify+0x52d/0x1f10 net/core/dev.c:11781
 unregister_netdevice_many net/core/dev.c:11873 [inline]
 default_device_exit_batch+0xa1f/0xaa0 net/core/dev.c:12358
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x8ad/0xd60 net/core/net_namespace.c:652
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </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 d0 b7 f9 f7 4d 89 ec 49 c1 ec 03 <43> 80 3c 3c 00 74 08 4c 89 ef e8 aa 93 60 f8 4d 8b 75 00 49 8d 7d
RSP: 0018:ffffc90000a18b38 EFLAGS: 00010247
RAX: ffffffff89c5d120 RBX: 0000000000000006 RCX: ffff888143ec1e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 1ffffffff1c6404a R08: ffffffff8a6e5bf9 R09: 1ffff11006465cc0
R10: dffffc0000000000 R11: ffffed1006465cc1 R12: 0000000000000000
R13: 0000000000000006 R14: 00000000fffffff8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fac14885ba8 CR3: 0000000025020000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
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 d0 b7 f9 f7       	call   0xf7f9b7f3
  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 aa 93 60 f8       	call   0xf86093e3
  39:	4d 8b 75 00          	mov    0x0(%r13),%r14
  3d:	49                   	rex.WB
  3e:	8d                   	.byte 0x8d
  3f:	7d                   	.byte 0x7d