Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 1333 Comm: kworker/u8:6 Not tainted 6.14.0-rc6-syzkaller-00022-gb7f94fcf5546 #0
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 30 aa f2 f7 4d 89 ec 49 c1 ec 03 <43> 80 3c 3c 00 74 08 4c 89 ef e8 da ef 59 f8 4d 8b 75 00 49 8d 7d
RSP: 0018:ffffc90000007af8 EFLAGS: 00010256
RAX: ffffffff89cf34e0 RBX: 0000000000000001 RCX: ffff888027e88000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 1ffffffff1caa64a R08: ffffffff8a781db9 R09: 1ffff1100a3bf0c0
R10: dffffc0000000000 R11: ffffed100a3bf0c1 R12: 0000000000000000
R13: 0000000000000001 R14: 00000000fffffff8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3f019f CR3: 000000007c1a8000 CR4: 0000000000350ef0
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
 fib_nh_release net/ipv4/fib_semantics.c:224 [inline]
 free_fib_info_rcu+0xdc/0x4a0 net/ipv4/fib_semantics.c:236
 rcu_do_batch kernel/rcu/tree.c:2546 [inline]
 rcu_core+0xaac/0x17a0 kernel/rcu/tree.c:2802
 handle_softirqs+0x2d6/0x9b0 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 2e 4f 1d f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 73 ad 83 f5 65 8b 05 c4 00 f8 73 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc90004787160 EFLAGS: 00000206
RAX: a5bbccc61822c200 RBX: 1ffff920008f0e30 RCX: ffffffff819d4b5a
RDX: dffffc0000000000 RSI: ffffffff8c2ab3a0 RDI: 0000000000000001
RBP: ffffc900047871f0 R08: ffffffff9454c84f R09: 1ffffffff28a9909
R10: dffffc0000000000 R11: fffffbfff28a990a R12: dffffc0000000000
R13: 1ffff920008f0e2c R14: ffffc90004787180 R15: 0000000000000246
 debug_object_activate+0x3f7/0x580 lib/debugobjects.c:836
 debug_rcu_head_queue kernel/rcu/rcu.h:224 [inline]
 __call_rcu_common kernel/rcu/tree.c:3050 [inline]
 call_rcu+0x97/0xac0 kernel/rcu/tree.c:3172
 kernfs_put+0x1dc/0x370 fs/kernfs/dir.c:578
 kernfs_remove_by_name_ns+0xe4/0x160 fs/kernfs/dir.c:1696
 kernfs_remove_by_name include/linux/kernfs.h:625 [inline]
 remove_files fs/sysfs/group.c:28 [inline]
 sysfs_remove_group+0xfe/0x2c0 fs/sysfs/group.c:322
 sysfs_remove_groups+0x54/0xb0 fs/sysfs/group.c:346
 device_remove_groups drivers/base/core.c:2820 [inline]
 device_remove_attrs+0x1dc/0x290 drivers/base/core.c:2950
 device_del+0x572/0x9b0 drivers/base/core.c:3854
 unregister_netdevice_many_notify+0x19b4/0x1f10 net/core/dev.c:11920
 unregister_netdevice_many net/core/dev.c:11948 [inline]
 default_device_exit_batch+0x7ff/0x880 net/core/dev.c:12431
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x8af/0xd60 net/core/net_namespace.c:652
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac0/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd30 kernel/workqueue.c:3400
 kthread+0x7ab/0x920 kernel/kthread.c:464
 ret_from_fork+0x4d/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 30 aa f2 f7 4d 89 ec 49 c1 ec 03 <43> 80 3c 3c 00 74 08 4c 89 ef e8 da ef 59 f8 4d 8b 75 00 49 8d 7d
RSP: 0018:ffffc90000007af8 EFLAGS: 00010256
RAX: ffffffff89cf34e0 RBX: 0000000000000001 RCX: ffff888027e88000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 1ffffffff1caa64a R08: ffffffff8a781db9 R09: 1ffff1100a3bf0c0
R10: dffffc0000000000 R11: ffffed100a3bf0c1 R12: 0000000000000000
R13: 0000000000000001 R14: 00000000fffffff8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3f019f CR3: 000000007c1a8000 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 30 aa f2 f7       	call   0xf7f2aa53
  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 da ef 59 f8       	call   0xf859f013
  39:	4d 8b 75 00          	mov    0x0(%r13),%r14
  3d:	49                   	rex.WB
  3e:	8d                   	.byte 0x8d
  3f:	7d                   	.byte 0x7d