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