BUG: kernel NULL pointer dereference, address: 0000000000000350
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 11dde2067 P4D 11dde2067 PUD 128f54067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rose_send_frame+0x2c/0xc0 net/rose/rose_link.c:101
Code: 49 89 fc 48 c7 c7 80 3b 8c 86 55 53 48 89 f3 48 c7 c6 40 13 99 83 e8 f3 39 00 00 4c 8b 4b 20 48 c7 c2 80 3b 8c 86 85 c0 75 07 <49> 8b 91 50 03 00 00 48 8b 6b 18 48 8d 4b 08 be 04 01 00 00 4c 89
RSP: 0018:ffffc90000d08d58 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88821710c400 RCX: 0000000000000000
RDX: ffffffff868c3b80 RSI: ffffffff83991340 RDI: ffffffff868c3b80
RBP: 0000000000000032 R08: 00000000000000c0 R09: 0000000000000000
R10: 0000000000000001 R11: 439461d9a0a5d4d8 R12: ffff88811f155500
R13: 0000000000000078 R14: 0000000000000005 R15: ffffffff82c49060
FS:  0000000000000000(0000) GS:ffff88812c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000350 CR3: 0000000121fae000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rose_transmit_clear_request+0x79/0xa0 net/rose/rose_link.c:255
 rose_rx_call_request+0x172/0x623 net/rose/af_rose.c:998
 rose_loopback_timer+0x81/0x150 net/rose/rose_loopback.c:100
 call_timer_fn+0xa7/0x330 kernel/time/timer.c:1413
 expire_timers kernel/time/timer.c:1458 [inline]
 __run_timers kernel/time/timer.c:1755 [inline]
 run_timer_softirq+0x20d/0x580 kernel/time/timer.c:1768
 __do_softirq+0xf6/0x508 kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x73/0x90 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0xbd/0xe0 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x57/0xe0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
Code: 5b c3 65 48 8b 04 25 c0 7e 01 00 f0 80 48 02 20 48 8b 00 a8 08 75 c3 e9 7c ff ff ff e9 07 00 00 00 0f 00 2d 7c de 5d 00 fb f4 <c3> 90 e9 07 00 00 00 0f 00 2d 6c de 5d 00 f4 c3 cc cc 41 55 41 54
RSP: 0018:ffffc90000cd3e30 EFLAGS: 00000286
RAX: 000000000002a8d7 RBX: ffff88812ab78400 RCX: 0000000000000034
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83042ddc
RBP: ffff88812ab78464 R08: 0000000000000001 R09: 0000000000000001
R10: ffff88812c12c464 R11: ffff88812c12c444 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:150 [inline]
 acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline]
 acpi_idle_do_entry+0x4b/0x70 drivers/acpi/processor_idle.c:524
 acpi_idle_enter+0xfa/0x300 drivers/acpi/processor_idle.c:650
 cpuidle_enter_state+0x62/0x420 drivers/cpuidle/cpuidle.c:235
 cpuidle_enter+0x24/0x40 drivers/cpuidle/cpuidle.c:346
 call_cpuidle kernel/sched/idle.c:126 [inline]
 cpuidle_idle_call kernel/sched/idle.c:214 [inline]
 do_idle+0x278/0x360 kernel/sched/idle.c:276
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:372
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243
Modules linked in:
CR2: 0000000000000350
---[ end trace 175419cb8e2be872 ]---
RIP: 0010:rose_send_frame+0x2c/0xc0 net/rose/rose_link.c:101
Code: 49 89 fc 48 c7 c7 80 3b 8c 86 55 53 48 89 f3 48 c7 c6 40 13 99 83 e8 f3 39 00 00 4c 8b 4b 20 48 c7 c2 80 3b 8c 86 85 c0 75 07 <49> 8b 91 50 03 00 00 48 8b 6b 18 48 8d 4b 08 be 04 01 00 00 4c 89
RSP: 0018:ffffc90000d08d58 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88821710c400 RCX: 0000000000000000
RDX: ffffffff868c3b80 RSI: ffffffff83991340 RDI: ffffffff868c3b80
RBP: 0000000000000032 R08: 00000000000000c0 R09: 0000000000000000
R10: 0000000000000001 R11: 439461d9a0a5d4d8 R12: ffff88811f155500
R13: 0000000000000078 R14: 0000000000000005 R15: ffffffff82c49060
FS:  0000000000000000(0000) GS:ffff88812c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000350 CR3: 0000000121fae000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400