general protection fault, probably for non-canonical address 0xdffffc0000000066: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000330-0x0000000000000337] CPU: 0 PID: 30215 Comm: syz-executor.5 Not tainted 5.7.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ax25_send_frame+0xe1/0x660 net/ax25/ax25_out.c:56 Code: c6 00 00 48 85 c0 0f 85 0c 04 00 00 e8 08 c3 75 fa 49 8d bc 24 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 d2 04 00 00 49 8b 84 24 30 03 00 00 48 85 c0 48 RSP: 0000:ffffc90000007ab8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88821537fc08 RCX: 1ffffffff1870537 RDX: 0000000000000066 RSI: ffffffff86fd6fa8 RDI: 0000000000000330 RBP: ffffffff8d233080 R08: 0000000000000001 R09: fffffbfff185e966 R10: ffffffff8c2f4b2f R11: fffffbfff185e965 R12: 0000000000000000 R13: 0000000000000104 R14: 0000000000000000 R15: ffff88805074bcc0 FS: 000000000131f940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e321000 CR3: 00000000a867f000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rose_send_frame+0xcc/0x2f0 net/rose/rose_link.c:106 rose_transmit_clear_request+0x1de/0x290 net/rose/rose_link.c:255 rose_rx_call_request+0x488/0x1960 net/rose/af_rose.c:996 rose_loopback_timer+0x15d/0x470 net/rose/rose_loopback.c:100 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x623/0x1600 kernel/time/timer.c:1786 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x192/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x19e/0x600 arch/x86/kernel/apic/apic.c:1140 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0033:0x411aad Code: 41 39 c1 75 e0 48 89 f8 25 ff 1f 00 00 89 3c 85 00 00 76 00 83 c5 01 e8 01 1e ff ff 41 83 c7 01 45 39 7c 24 04 76 3e 44 89 f8 <49> 8b 34 c6 4a 8d 04 2e 48 3d ff ff ff 7e 0f 86 77 ff ff ff bf 4d RSP: 002b:00007ffcf22ff960 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 00000000000209b6 RBX: 00000000282c2347 RCX: 0000001b2f320000 RDX: 00000000804aa30c RSI: 000000000000030c RDI: ffffffff804aa30c RBP: 00000000000007dd R08: 00000000804aa30c R09: 00000000804aa310 R10: 00007ffcf22ffb10 R11: 0000000000000246 R12: 000000000078bf88 R13: 0000000080000000 R14: 00007f053b754008 R15: 00000000000209b6 Modules linked in: ---[ end trace 60b32a7f70a70302 ]--- RIP: 0010:ax25_send_frame+0xe1/0x660 net/ax25/ax25_out.c:56 Code: c6 00 00 48 85 c0 0f 85 0c 04 00 00 e8 08 c3 75 fa 49 8d bc 24 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 d2 04 00 00 49 8b 84 24 30 03 00 00 48 85 c0 48 RSP: 0000:ffffc90000007ab8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88821537fc08 RCX: 1ffffffff1870537 RDX: 0000000000000066 RSI: ffffffff86fd6fa8 RDI: 0000000000000330 RBP: ffffffff8d233080 R08: 0000000000000001 R09: fffffbfff185e966 R10: ffffffff8c2f4b2f R11: fffffbfff185e965 R12: 0000000000000000 R13: 0000000000000104 R14: 0000000000000000 R15: ffff88805074bcc0 FS: 000000000131f940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e321000 CR3: 00000000a867f000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400