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: 4869 Comm: kworker/u8:8 Not tainted 6.13.0-syzkaller-09690-g3f1baa91a1fd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:llc_conn_state_process+0xc5d/0x12e0
Code: 0f 94 c0 4c 8b 75 00 44 8d 64 00 01 b8 01 00 00 00 bd 07 00 00 00 0f 44 e8 4c 89 f0 48 c1 e8 03 48 ba 00 00 00 00 00 fc ff df <0f> b6 04 10 84 c0 0f 85 c1 05 00 00 45 89 26 0f b6 04 13 84 c0 0f
RSP: 0018:ffffc90000a18b68 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff1100662ac02 RCX: ffff8880349d9e00
RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000007 R08: ffffffff89db5f81 R09: ffffffff89db5d68
R10: 0000000000000005 R11: ffff8880349d9e00 R12: 0000000000000001
R13: ffff888033156000 R14: 0000000000000000 R15: ffff888033156012
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c371dbe CR3: 00000000326ea000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 llc_process_tmr_ev net/llc/llc_c_ac.c:1445 [inline]
 llc_conn_tmr_common_cb+0x34c/0x850 net/llc/llc_c_ac.c:1331
 call_timer_fn+0x187/0x650 kernel/time/timer.c:1789
 expire_timers kernel/time/timer.c:1840 [inline]
 __run_timers kernel/time/timer.c:2414 [inline]
 __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2426
 run_timer_base kernel/time/timer.c:2435 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445
 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
 do_softirq+0x11b/0x1e0 kernel/softirq.c:462
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:389
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_nc_purge_paths+0x312/0x3b0 net/batman-adv/network-coding.c:471
 batadv_nc_worker+0x328/0x610 net/batman-adv/network-coding.c:720
 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:llc_conn_state_process+0xc5d/0x12e0
Code: 0f 94 c0 4c 8b 75 00 44 8d 64 00 01 b8 01 00 00 00 bd 07 00 00 00 0f 44 e8 4c 89 f0 48 c1 e8 03 48 ba 00 00 00 00 00 fc ff df <0f> b6 04 10 84 c0 0f 85 c1 05 00 00 45 89 26 0f b6 04 13 84 c0 0f
RSP: 0018:ffffc90000a18b68 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff1100662ac02 RCX: ffff8880349d9e00
RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000007 R08: ffffffff89db5f81 R09: ffffffff89db5d68
R10: 0000000000000005 R11: ffff8880349d9e00 R12: 0000000000000001
R13: ffff888033156000 R14: 0000000000000000 R15: ffff888033156012
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c371dbe CR3: 00000000326ea000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f 94 c0             	sete   %al
   3:	4c 8b 75 00          	mov    0x0(%rbp),%r14
   7:	44 8d 64 00 01       	lea    0x1(%rax,%rax,1),%r12d
   c:	b8 01 00 00 00       	mov    $0x1,%eax
  11:	bd 07 00 00 00       	mov    $0x7,%ebp
  16:	0f 44 e8             	cmove  %eax,%ebp
  19:	4c 89 f0             	mov    %r14,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  27:	fc ff df
* 2a:	0f b6 04 10          	movzbl (%rax,%rdx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 c1 05 00 00    	jne    0x5f7
  36:	45 89 26             	mov    %r12d,(%r14)
  39:	0f b6 04 13          	movzbl (%rbx,%rdx,1),%eax
  3d:	84 c0                	test   %al,%al
  3f:	0f                   	.byte 0xf