Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 10682 Comm: syz.8.442 Not tainted 6.16.0-rc7-syzkaller-00018-g01a412d06bc5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 d0 e9 6d f8 49 89 dd 49 c1 ed 03 <43> 80 7c 25 00 00 74 08 48 89 df e8 f9 d0 cd f8 4c 8b 33 48 8d 7b
RSP: 0018:ffffc90000007b38 EFLAGS: 00010246
RAX: ffffffff89523be0 RBX: 0000000000000002 RCX: ffff88802bd61e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffffffff1b75260 R08: ffff8880542f460b R09: 1ffff1100a85e8c1
R10: dffffc0000000000 R11: ffffed100a85e8c2 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000607ed9ffde00 R15: 0000000000000001
FS:  00007fb3f5b6a6c0(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f263a5af000 CR3: 00000000785a4000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:195 [inline]
 fib_nh_common_release+0x1ed/0x420 net/ipv4/fib_semantics.c:206
 fib6_info_destroy_rcu+0xca/0x1c0 net/ipv6/ip6_fib.c:177
 rcu_do_batch kernel/rcu/tree.c:2576 [inline]
 rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2832
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch+0x26b/0x950 kernel/sched/core.c:5265
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 0f 1b d7 09 e8 da b7 35 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900041feb98 EFLAGS: 00000282
RAX: 72fa43f17b9e9700 RBX: 0000000000000000 RCX: 72fa43f17b9e9700
RDX: 0000000000000006 RSI: ffffffff8d982fe4 RDI: ffffffff8be1ba00
RBP: ffffc900041febf0 R08: ffffffff8fa0b2f7 R09: 1ffffffff1f4165e
R10: dffffc0000000000 R11: fffffbfff1f4165f R12: ffff88802bd61e00
R13: dffffc0000000000 R14: ffff88802fe58000 R15: ffff8880b863a9d8
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x16b2/0x4c90 kernel/sched/core.c:6786
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7109
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5875
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 7b 55 fe 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc900041fef98 EFLAGS: 00000206
RAX: 72fa43f17b9e9700 RBX: 0000000000000000 RCX: 72fa43f17b9e9700
RDX: 0000000000000000 RSI: ffffffff8db6fce0 RDI: ffffffff8be1ba00
RBP: ffffffff8172aae5 R08: 0000000000000000 R09: ffffffff8172aae5
R10: ffffc900041ff158 R11: ffffffff81acfd30 R12: 0000000000000002
R13: ffffffff8e13f0e0 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 save_stack+0xf7/0x1f0 mm/page_owner.c:156
 __set_page_owner+0x8d/0x4a0 mm/page_owner.c:329
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704
 prep_new_page mm/page_alloc.c:1712 [inline]
 get_page_from_freelist+0x21d5/0x22b0 mm/page_alloc.c:3669
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419
 folio_alloc_mpol_noprof+0x39/0x70 mm/mempolicy.c:2438
 shmem_alloc_folio mm/shmem.c:1851 [inline]
 shmem_alloc_and_add_folio+0x447/0xf60 mm/shmem.c:1890
 shmem_get_folio_gfp+0x59d/0x1660 mm/shmem.c:2536
 shmem_get_folio mm/shmem.c:2642 [inline]
 shmem_write_begin+0xf7/0x2b0 mm/shmem.c:3292
 generic_perform_write+0x2c7/0x910 mm/filemap.c:4112
 shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3467
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x548/0xa90 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb3f4d8d45f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007fb3f5b69df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007fb3f4d8d45f
RDX: 0000000001000000 RSI: 00007fb3ea600000 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000061b0
R10: 0000000000000794 R11: 0000000000000293 R12: 0000000000000005
R13: 00007fb3f5b69ef0 R14: 00007fb3f5b69eb0 R15: 00007fb3ea600000
 </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 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 d0 e9 6d f8 49 89 dd 49 c1 ed 03 <43> 80 7c 25 00 00 74 08 48 89 df e8 f9 d0 cd f8 4c 8b 33 48 8d 7b
RSP: 0018:ffffc90000007b38 EFLAGS: 00010246
RAX: ffffffff89523be0 RBX: 0000000000000002 RCX: ffff88802bd61e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffffffff1b75260 R08: ffff8880542f460b R09: 1ffff1100a85e8c1
R10: dffffc0000000000 R11: ffffed100a85e8c2 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000607ed9ffde00 R15: 0000000000000001
FS:  00007fb3f5b6a6c0(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f263a5af000 CR3: 00000000785a4000 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 d0 e9 6d f8       	call   0xf86de9f3
  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 f9 d0 cd f8       	call   0xf8cdd133
  3a:	4c 8b 33             	mov    (%rbx),%r14
  3d:	48                   	rex.W
  3e:	8d                   	.byte 0x8d
  3f:	7b                   	.byte 0x7b