Oops: general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097]
CPU: 0 UID: 0 PID: 6257 Comm: kworker/u8:12 Not tainted 6.15.0-rc7-syzkaller-01658-gea15e046263b #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: bat_events batadv_nc_worker
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 ea 7a f8 49 89 dd 49 c1 ed 03 <43> 80 7c 25 00 00 74 08 48 89 df e8 59 e6 dc f8 4c 8b 33 48 8d 7b
RSP: 0018:ffffc90000007b08 EFLAGS: 00010207
RAX: ffffffff89450700 RBX: 0000000000000094 RCX: ffff888025f6bc00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000094
RBP: 1ffffffff1b2f466 R08: ffff88802771c60b R09: 1ffff11004ee38c1
R10: dffffc0000000000 R11: ffffed1004ee38c2 R12: dffffc0000000000
R13: 0000000000000012 R14: 0000607ed9b72888 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881260b2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe6e3ce7d60 CR3: 000000000dd38000 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:195 [inline]
 fib_nh_common_release+0x1ed/0x420 net/ipv4/fib_semantics.c:206
 fib_nh_release net/ipv4/fib_semantics.c:218 [inline]
 free_fib_info_rcu+0xdf/0x310 net/ipv4/fib_semantics.c:230
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xca8/0x1710 kernel/rcu/tree.c:2824
 handle_softirqs+0x286/0x870 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: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:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5870
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 8b 9f d8 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:ffffc9000da7f9b0 EFLAGS: 00000206
RAX: ebd845935b940800 RBX: 0000000000000000 RCX: ebd845935b940800
RDX: 0000000000000000 RSI: ffffffff8d941511 RDI: ffffffff8bc1f600
RBP: ffffffff8b26f34a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8b26f34a R12: 0000000000000002
R13: ffffffff8df3dee0 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 batadv_nc_process_nc_paths+0xdb/0x3a0 net/batman-adv/network-coding.c:687
 batadv_nc_worker+0x429/0x610 net/batman-adv/network-coding.c:728
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/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 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 d0 ea 7a f8 49 89 dd 49 c1 ed 03 <43> 80 7c 25 00 00 74 08 48 89 df e8 59 e6 dc f8 4c 8b 33 48 8d 7b
RSP: 0018:ffffc90000007b08 EFLAGS: 00010207
RAX: ffffffff89450700 RBX: 0000000000000094 RCX: ffff888025f6bc00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000094
RBP: 1ffffffff1b2f466 R08: ffff88802771c60b R09: 1ffff11004ee38c1
R10: dffffc0000000000 R11: ffffed1004ee38c2 R12: dffffc0000000000
R13: 0000000000000012 R14: 0000607ed9b72888 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881260b2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe6e3ce7d60 CR3: 000000000dd38000 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:	48 89 fb             	mov    %rdi,%rbx
  14:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  1b:	fc ff df
  1e:	e8 d0 ea 7a f8       	call   0xf87aeaf3
  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 59 e6 dc f8       	call   0xf8dce693
  3a:	4c 8b 33             	mov    (%rbx),%r14
  3d:	48                   	rex.W
  3e:	8d                   	.byte 0x8d
  3f:	7b                   	.byte 0x7b