Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 0 UID: 0 PID: 23206 Comm: syz.0.5958 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:ax25_output+0x8cc/0xa60 net/ax25/ax25_out.c:199
Code: 19 e0 fe 49 8d 5d 28 48 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 32 bf 16 f8 48 8b 1b 4c 8d 73 60 4c 89 f0 48 c1 e8 03 <0f> b6 04 28 84 c0 0f 85 f2 00 00 00 45 8b 36 4c 89 f7 48 c7 c6 b0
RSP: 0018:ffffc90004927910 EFLAGS: 00010206
RAX: 000000000000000c RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8d636c43 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: ffffffff8f8bcef7 R09: 1ffffffff1f179de
R10: dffffc0000000000 R11: fffffbfff1f179df R12: ffff8880320b92f0
R13: ffff88802ab5f000 R14: 0000000000000060 R15: ffff8880320b9280
FS:  00007fbaa73656c0(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe31c6656b8 CR3: 0000000072e10000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ax25_send_frame+0x310/0x9f0 net/ax25/ax25_out.c:-1
 rose_send_frame net/rose/rose_link.c:106 [inline]
 rose_transmit_restart_request net/rose/rose_link.c:198 [inline]
 rose_transmit_link+0x729/0xac0 net/rose/rose_link.c:284
 rose_write_internal+0x1256/0x1b60 net/rose/rose_subr.c:198
 rose_connect+0x95c/0x10b0 net/rose/af_rose.c:886
 __sys_connect_file net/socket.c:2148 [inline]
 __sys_connect+0x315/0x450 net/socket.c:2167
 __do_sys_connect net/socket.c:2173 [inline]
 __se_sys_connect net/socket.c:2170 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:2170
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbaa912c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbaa7365028 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007fbaa93a6090 RCX: 00007fbaa912c819
RDX: 0000000000000040 RSI: 00002000000000c0 RDI: 0000000000000009
RBP: 00007fbaa91c2c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbaa93a6128 R14: 00007fbaa93a6090 R15: 00007fff1461bcc8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ax25_output+0x8cc/0xa60 net/ax25/ax25_out.c:199
Code: 19 e0 fe 49 8d 5d 28 48 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 32 bf 16 f8 48 8b 1b 4c 8d 73 60 4c 89 f0 48 c1 e8 03 <0f> b6 04 28 84 c0 0f 85 f2 00 00 00 45 8b 36 4c 89 f7 48 c7 c6 b0
RSP: 0018:ffffc90004927910 EFLAGS: 00010206
RAX: 000000000000000c RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8d636c43 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: ffffffff8f8bcef7 R09: 1ffffffff1f179de
R10: dffffc0000000000 R11: fffffbfff1f179df R12: ffff8880320b92f0
R13: ffff88802ab5f000 R14: 0000000000000060 R15: ffff8880320b9280
FS:  00007fbaa73656c0(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe31c6656b8 CR3: 0000000072e10000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	19 e0                	sbb    %esp,%eax
   2:	fe 49 8d             	decb   -0x73(%rcx)
   5:	5d                   	pop    %rbp
   6:	28 48 89             	sub    %cl,-0x77(%rax)
   9:	d8 48 c1             	fmuls  -0x3f(%rax)
   c:	e8 03 80 3c 28       	call   0x283c8014
  11:	00 74 08 48          	add    %dh,0x48(%rax,%rcx,1)
  15:	89 df                	mov    %ebx,%edi
  17:	e8 32 bf 16 f8       	call   0xf816bf4e
  1c:	48 8b 1b             	mov    (%rbx),%rbx
  1f:	4c 8d 73 60          	lea    0x60(%rbx),%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 f2 00 00 00    	jne    0x128
  36:	45 8b 36             	mov    (%r14),%r14d
  39:	4c 89 f7             	mov    %r14,%rdi
  3c:	48                   	rex.W
  3d:	c7                   	.byte 0xc7
  3e:	c6                   	(bad)
  3f:	b0                   	.byte 0xb0