kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 14188 Comm: syz-executor.3 Not tainted 5.1.0-rc6 #79
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ax25_send_frame+0xe5/0x580 net/ax25/ax25_out.c:59
Code: 89 00 00 48 85 c0 0f 85 d4 03 00 00 e8 a4 0b 2f fb 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 fb 03 00 00 49 8b 84 24 30 03 00 00 48 85 c0 48
RSP: 0018:ffff8880ae807a98 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88821661d348 RCX: 1ffff11010934d3e
RDX: 0000000000000066 RSI: ffffffff8641814c RDI: 0000000000000330
RBP: ffff8880ae807ad8 R08: ffff8880849a6100 R09: ffff8880849a69f0
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8b14f600 R14: 0000000000000104 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000008871000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rose_send_frame+0xda/0x280 net/rose/rose_link.c:109
 rose_transmit_clear_request+0x1de/0x2a0 net/rose/rose_link.c:258
 rose_rx_call_request+0x4ea/0x1990 net/rose/af_rose.c:1001
 rose_loopback_timer+0x26a/0x3f0 net/rose/rose_loopback.c:100
 call_timer_fn+0x190/0x720 kernel/time/timer.c:1325
 expire_timers kernel/time/timer.c:1362 [inline]
 __run_timers kernel/time/timer.c:1681 [inline]
 __run_timers kernel/time/timer.c:1649 [inline]
 run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1694
 __do_softirq+0x266/0x95a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:374 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:414
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x14a/0x570 arch/x86/kernel/apic/apic.c:1062
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:rcu_read_lock+0x29/0x70 include/linux/rcupdate.h:596
Code: 00 55 48 89 e5 e8 57 5f b1 ff 31 d2 45 31 c9 45 31 c0 31 f6 68 f0 d9 ac 81 b9 02 00 00 00 48 c7 c7 c0 5b 9a 88 e8 37 bc aa ff <e8> a2 e8 b0 ff 5a 85 c0 74 09 80 3d 29 91 ad 07 00 74 02 c9 c3 e8
RSP: 0018:ffff88804be07658 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11252ee RBX: ffffea0002459d80 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286
RBP: ffff88804be07660 R08: 000000000ccf22f7 R09: ffffffff895e6714
R10: ffff8880849a69a8 R11: ffff8880849a6100 R12: ffffea0002459d80
R13: ffffea0002459d88 R14: 0000000000000000 R15: dead000000000100
 lock_page_memcg+0x19/0x1d0 mm/memcontrol.c:1897
 page_remove_file_rmap mm/rmap.c:1217 [inline]
 page_remove_rmap+0x53d/0x12c0 mm/rmap.c:1302
 zap_pte_range mm/memory.c:1091 [inline]
 zap_pmd_range mm/memory.c:1193 [inline]
 zap_pud_range mm/memory.c:1222 [inline]
 zap_p4d_range mm/memory.c:1243 [inline]
 unmap_page_range+0xd70/0x2330 mm/memory.c:1264
 unmap_single_vma+0x19d/0x300 mm/memory.c:1309
 unmap_vmas+0x115/0x250 mm/memory.c:1340
 exit_mmap+0x2c2/0x530 mm/mmap.c:3143
 __mmput kernel/fork.c:1046 [inline]
 mmput+0x15f/0x4c0 kernel/fork.c:1067
 exit_mm kernel/exit.c:546 [inline]
 do_exit+0x816/0x2fa0 kernel/exit.c:863
 do_group_exit+0x135/0x370 kernel/exit.c:980
 get_signal+0x399/0x1d50 kernel/signal.c:2577
 do_signal+0x87/0x1940 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458c29
Code: Bad RIP value.
RSP: 002b:00007f5a1fab4cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000073bfa8 RCX: 0000000000458c29
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000073bfa8
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000073bfac
R13: 00007ffe0ca8fc6f R14: 00007f5a1fab59c0 R15: 000000000073bfac
Modules linked in:
---[ end trace 37447522c860b4b4 ]---
RIP: 0010:ax25_send_frame+0xe5/0x580 net/ax25/ax25_out.c:59
Code: 89 00 00 48 85 c0 0f 85 d4 03 00 00 e8 a4 0b 2f fb 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 fb 03 00 00 49 8b 84 24 30 03 00 00 48 85 c0 48
RSP: 0018:ffff8880ae807a98 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88821661d348 RCX: 1ffff11010934d3e
RDX: 0000000000000066 RSI: ffffffff8641814c RDI: 0000000000000330
RBP: ffff8880ae807ad8 R08: ffff8880849a6100 R09: ffff8880849a69f0
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8b14f600 R14: 0000000000000104 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000458bff CR3: 0000000008871000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600