general protection fault, probably for non-canonical address 0xdffffc0000000066: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000330-0x0000000000000337]
CPU: 1 PID: 16451 Comm: kworker/u4:9 Not tainted 5.8.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:ax25_dev_ax25dev include/net/ax25.h:337 [inline]
RIP: 0010:ax25_send_frame+0xe4/0x640 net/ax25/ax25_out.c:56
Code: 00 48 85 c0 49 89 c4 0f 85 fb 03 00 00 e8 94 04 64 fa 49 8d bd 30 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 b1 04 00 00 4d 8b ad 30 03 00 00 4d 85 ed 0f 84
RSP: 0018:ffffc90000da8ad0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888214f20808 RCX: 1ffffffff155cb82
RDX: 0000000000000066 RSI: ffffffff870f4bbc RDI: 0000000000000330
RBP: ffffffff8d4cd180 R08: 0000000000000000 R09: 0000000000000001
R10: fffffbfff18b176e R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000104 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004ff1b0 CR3: 000000008e8fc000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rose_send_frame+0xcc/0x2f0 net/rose/rose_link.c:106
 rose_transmit_clear_request+0x1d5/0x290 net/rose/rose_link.c:255
 rose_rx_call_request+0x4bd/0x1978 net/rose/af_rose.c:998
 rose_loopback_timer+0x15d/0x470 net/rose/rose_loopback.c:100
 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers.part.0+0x54c/0xa20 kernel/time/timer.c:1773
 __run_timers kernel/time/timer.c:1745 [inline]
 run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1786
 __do_softirq+0x34c/0xa60 kernel/softirq.c:292
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x111/0x170 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:387 [inline]
 __irq_exit_rcu kernel/softirq.c:417 [inline]
 irq_exit_rcu+0x229/0x270 kernel/softirq.c:429
 sysvec_apic_timer_interrupt+0x12d/0x220 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline]
RIP: 0010:lock_acquire+0x270/0xad0 kernel/locking/lockdep.c:4962
Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 f8 06 00 00 48 83 3d 1d 0c 5b 08 00 0f 84 a6 05 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7
RSP: 0018:ffffc900051b7b80 EFLAGS: 00000286
RAX: 1ffffffff13696a8 RBX: ffff88805c8fa2c0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0735991c2cd44f92 RDI: 0000000000000286
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8c58ba27
R10: fffffbfff18b1744 R11: 0000000000000000 R12: 0000000000000002
R13: ffffffff89bbe640 R14: 0000000000000000 R15: ffff88805c8fa2c0
 rcu_lock_acquire include/linux/rcupdate.h:241 [inline]
 rcu_read_lock include/linux/rcupdate.h:634 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:407 [inline]
 batadv_nc_worker+0x12d/0xe50 net/batman-adv/network-coding.c:718
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Modules linked in:
---[ end trace 8eef0cdbc506a930 ]---
RIP: 0010:ax25_dev_ax25dev include/net/ax25.h:337 [inline]
RIP: 0010:ax25_send_frame+0xe4/0x640 net/ax25/ax25_out.c:56
Code: 00 48 85 c0 49 89 c4 0f 85 fb 03 00 00 e8 94 04 64 fa 49 8d bd 30 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 b1 04 00 00 4d 8b ad 30 03 00 00 4d 85 ed 0f 84
RSP: 0018:ffffc90000da8ad0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888214f20808 RCX: 1ffffffff155cb82
RDX: 0000000000000066 RSI: ffffffff870f4bbc RDI: 0000000000000330
RBP: ffffffff8d4cd180 R08: 0000000000000000 R09: 0000000000000001
R10: fffffbfff18b176e R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000104 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004ff1b0 CR3: 000000008e8fc000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400