BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1e2fd2067 P4D 1e2fd2067 PUD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 3085 Comm: syz.8.766 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09cf0 EFLAGS: 00010202
RAX: ffffffff8150a590 RBX: 0000000000000101 RCX: ffff8881e903af40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881d863b1c0
RBP: ffff8881f6e09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: 00000000ffffacd8
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881d863b1c0
FS:  00007f6d157406c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001da7a7000 CR4: 00000000003406b0
DR0: 0010000010000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_timer_fn+0x3c/0x380 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x81d/0xb60 kernel/time/timer.c:1817
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x236/0x660 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x197/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:539 [inline]
 smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:pte_none arch/x86/include/asm/pgtable.h:725 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1069 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1222 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1251 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1272 [inline]
RIP: 0010:unmap_page_range+0xa44/0x1b20 mm/memory.c:1293
Code: 00 00 49 89 dc 49 c1 ec 03 48 b8 00 00 00 00 00 fc ff df 41 80 3c 04 00 74 08 48 89 df e8 44 de 08 00 4c 89 7c 24 20 4d 8b 3f <4c> 89 fe 48 83 e6 9f 31 ff e8 ce e7 da ff 4c 89 f8 48 83 e0 9f 0f
RSP: 0018:ffff8881da8ef620 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffff8881db32bc40 RCX: ffff8881e903af40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881da8ef770 R08: dffffc0000000000 R09: fffff94000eec8df
R10: fffff94000eec8df R11: 1ffffd4000eec8de R12: 1ffff1103b665788
R13: 00007f6d17200000 R14: 00007f6d17189000 R15: 0000000000000000
 unmap_single_vma mm/memory.c:1338 [inline]
 unmap_vmas+0x245/0x340 mm/memory.c:1370
 exit_mmap+0x2bb/0x520 mm/mmap.c:3191
 __mmput+0x92/0x2e0 kernel/fork.c:1101
 mmput+0x47/0x60 kernel/fork.c:1122
 exit_mm kernel/exit.c:538 [inline]
 do_exit+0x99f/0x2660 kernel/exit.c:848
 do_group_exit+0x13e/0x300 kernel/exit.c:984
 get_signal+0xdee/0x13d0 kernel/signal.c:2738
 do_signal+0xad/0xda0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0xc4/0x1b0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode+0x18e/0x1f0 arch/x86/entry/common.c:194
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x13e/0x170 arch/x86/entry/common.c:300
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f6d170f8969
Code: Bad RIP value.
RSP: 002b:00007f6d157400e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f6d17320088 RCX: 00007f6d170f8969
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6d17320088
RBP: 00007f6d17320080 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6d1732008c
R13: 0000000000000000 R14: 00007fff0815c080 R15: 00007fff0815c168
Modules linked in:
CR2: 0000000000000000
---[ end trace 968dc23a2036b4d1 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09cf0 EFLAGS: 00010202
RAX: ffffffff8150a590 RBX: 0000000000000101 RCX: ffff8881e903af40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881d863b1c0
RBP: ffff8881f6e09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: 00000000ffffacd8
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881d863b1c0
FS:  00007f6d157406c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001da7a7000 CR4: 00000000003406b0
DR0: 0010000010000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	49 89 dc             	mov    %rbx,%r12
   5:	49 c1 ec 03          	shr    $0x3,%r12
   9:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  10:	fc ff df
  13:	41 80 3c 04 00       	cmpb   $0x0,(%r12,%rax,1)
  18:	74 08                	je     0x22
  1a:	48 89 df             	mov    %rbx,%rdi
  1d:	e8 44 de 08 00       	call   0x8de66
  22:	4c 89 7c 24 20       	mov    %r15,0x20(%rsp)
  27:	4d 8b 3f             	mov    (%r15),%r15
* 2a:	4c 89 fe             	mov    %r15,%rsi <-- trapping instruction
  2d:	48 83 e6 9f          	and    $0xffffffffffffff9f,%rsi
  31:	31 ff                	xor    %edi,%edi
  33:	e8 ce e7 da ff       	call   0xffdae806
  38:	4c 89 f8             	mov    %r15,%rax
  3b:	48 83 e0 9f          	and    $0xffffffffffffff9f,%rax
  3f:	0f                   	.byte 0xf