general protection fault, probably for non-canonical address 0xdffffc000000006c: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000360-0x0000000000000367]
CPU: 1 PID: 7756 Comm: syz-executor.5 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:ax25_dev_ax25dev include/net/ax25.h:342 [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 64 7b 28 f9 49 8d bd 60 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 60 03 00 00 4d 85 ed 0f 84
RSP: 0000:ffffc900001f0ab8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888026483808 RCX: 0000000000000100
RDX: 000000000000006c RSI: ffffffff88529a0c RDI: 0000000000000360
RBP: ffffffff91580360 R08: 0000000000000001 R09: ffffffff90903ab7
R10: 0000000000000001 R11: 1ffffffff200e135 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000104 R15: 0000000000000000
FS:  0000555556cdf400(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc97b02c78 CR3: 000000003ae6e000 CR4: 00000000003506e0
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+0x4c0/0x1bc0 net/rose/af_rose.c:1009
 rose_loopback_timer+0x19e/0x590 net/rose/rose_loopback.c:111
 call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1519 [inline]
 __run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790
 __run_timers kernel/time/timer.c:1768 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
 __do_softirq+0x1d0/0x9c8 kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:200
Code: 4c 00 5d be 03 00 00 00 e9 b6 09 83 02 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 c9 59 87 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 6f 02 00 a9
RSP: 0000:ffffc9000efb7ca0 EFLAGS: 00000246
RAX: 0000000080000001 RBX: ffffea0001a50540 RCX: ffffffff81b4697a
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea0001a50540
RBP: ffffc9000efb7d88 R08: 0000000000000000 R09: ffffea0001a50577
R10: fffff9400034a0ae R11: 0000000000000000 R12: ffff88803e42b948
R13: ffffc9000efb7dd8 R14: ffffea0001a50540 R15: ffffea0001a50540
 _compound_head+0xc/0x150 include/linux/page-flags.h:253
 PageSwapCache include/linux/page-flags.h:549 [inline]
 do_wp_page+0xdf7/0x1910 mm/memory.c:3436
 handle_pte_fault mm/memory.c:4935 [inline]
 __handle_mm_fault+0x1813/0x39b0 mm/memory.c:5059
 handle_mm_fault+0x1c8/0x780 mm/memory.c:5157
 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1407
 handle_page_fault arch/x86/mm/fault.c:1498 [inline]
 exc_page_fault+0x94/0x170 arch/x86/mm/fault.c:1554
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f987224873d
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 48 89 e5 41 57 41 56 49 89 d6 41 55 49 89 f5 41 54 49 89 fc 53 48 81 ec 28 05 00 00 <89> 8d 38 fb ff ff 64 48 8b 04 25 28 00 00 00 48 89 45 c8 48 c7 c0
RSP: 002b:00007ffc97b02bf0 EFLAGS: 00010206
RAX: 00000000fbad8001 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 00007ffc97b032e0 RSI: 00007f98722e54a2 RDI: 00007ffc97b03160
RBP: 00007ffc97b03140 R08: 0000000000000000 R09: 00007ffc97b03250
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc97b03160
R13: 00007f98722e54a2 R14: 00007ffc97b032e0 R15: 00007ffc97b032e0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ax25_dev_ax25dev include/net/ax25.h:342 [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 64 7b 28 f9 49 8d bd 60 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 60 03 00 00 4d 85 ed 0f 84
RSP: 0000:ffffc900001f0ab8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888026483808 RCX: 0000000000000100
RDX: 000000000000006c RSI: ffffffff88529a0c RDI: 0000000000000360
RBP: ffffffff91580360 R08: 0000000000000001 R09: ffffffff90903ab7
R10: 0000000000000001 R11: 1ffffffff200e135 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000104 R15: 0000000000000000
FS:  0000555556cdf400(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc97b02c78 CR3: 000000003ae6e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 48 85             	add    %cl,-0x7b(%rax)
   3:	c0 49 89 c4          	rorb   $0xc4,-0x77(%rcx)
   7:	0f 85 fb 03 00 00    	jne    0x408
   d:	e8 64 7b 28 f9       	callq  0xf9287b76
  12:	49 8d bd 60 03 00 00 	lea    0x360(%r13),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 b1 04 00 00    	jne    0x4e5
  34:	4d 8b ad 60 03 00 00 	mov    0x360(%r13),%r13
  3b:	4d 85 ed             	test   %r13,%r13
  3e:	0f                   	.byte 0xf
  3f:	84                   	.byte 0x84