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: 6852 Comm: syz-fuzzer Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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 34 f1 57 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: 0000:ffffc90000da8ac0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88821487f008 RCX: 0000000000000002
RDX: 0000000000000066 RSI: ffffffff871c4ddc RDI: 0000000000000330
RBP: ffffffff8d53b1a0 R08: 0000000000000001 R09: ffffffff8c5f7b17
R10: fffffbfff18bef62 R11: 1ffffffff183c6a1 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000104 R15: 0000000000000000
FS:  000000c00003e790(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000052c338 CR3: 00000000a8f38000 CR4: 00000000001506e0
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:1413
 expire_timers kernel/time/timer.c:1458 [inline]
 __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
 __run_timers kernel/time/timer.c:1736 [inline]
 run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
 __do_softirq+0x2de/0xa24 kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </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+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0033:0x41ff69
Code: 0a 48 8b 6c 24 20 48 83 c4 28 c3 48 89 14 24 48 89 74 24 08 e8 58 3f 00 00 eb e6 0f 83 6c 01 00 00 48 89 74 c3 18 48 ff 43 10 <b8> 01 00 00 00 eb cc 31 c0 eb c8 ff c1 83 f9 08 19 db 0f b6 3a 40
RSP: 002b:000000c000049e78 EFLAGS: 00000207
RAX: 0000000000000077 RBX: 000000c00c1b5000 RCX: 0000000000000003
RDX: 000000c00002d698 RSI: 000000c0080f7a10 RDI: 0000000000000003
RBP: 000000c000049e98 R08: 0000000000000048 R09: 0000000000000008
R10: 00007fb9941a7a38 R11: 0000000000000018 R12: 000000c0080f7a10
R13: 0000000000e937a0 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace ff89f3caa312ba14 ]---
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 34 f1 57 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: 0000:ffffc90000da8ac0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88821487f008 RCX: 0000000000000002
RDX: 0000000000000066 RSI: ffffffff871c4ddc RDI: 0000000000000330
RBP: ffffffff8d53b1a0 R08: 0000000000000001 R09: ffffffff8c5f7b17
R10: fffffbfff18bef62 R11: 1ffffffff183c6a1 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000104 R15: 0000000000000000
FS:  000000c00003e790(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000052c338 CR3: 00000000a8f38000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400