BUG: unable to handle kernel paging request at ffffea0004903148
PGD 21f7ef067 P4D 21f7ef067 PUD 21f7ee067 PMD 0 
Oops: 0000 [#1] SMP PTI
CPU: 1 PID: 11156 Comm: syz-executor0 Not tainted 4.18.0-rc8+ #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:197 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:142 [inline]
RIP: 0010:PageAnon include/linux/page-flags.h:413 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1324 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1436 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1465 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1486 [inline]
RIP: 0010:unmap_page_range+0x17ec/0x3b60 mm/memory.c:1507
Code: 00 4c 8b b4 24 b0 00 00 00 4c 8b 64 24 40 0f 84 3f 0c 00 00 4d 8d 6c 24 08 4c 8b bc 24 80 00 00 00 4d 85 ff 0f 85 54 03 00 00 <4d> 8b 74 24 08 4c 89 ef e8 c7 36 16 00 48 8b 08 89 c8 83 e0 01 45 
RSP: 0018:ffff8801abdbf2a0 EFLAGS: 00010246
RAX: ffff8801b186f680 RBX: 0000000000000000 RCX: ffff88019d6ef680
RDX: ffff88019d6ef680 RSI: aaaaaaaaaaaab000 RDI: ffffea000a0727a0
RBP: ffff8801abdbf508 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: ffffea0004903140
R13: ffffea0004903148 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f0a6d966700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffea0004903148 CR3: 000000015d4ec000 CR4: 00000000001406e0
Call Trace:
 unmap_single_vma+0x445/0x5e0 mm/memory.c:1552
 unmap_vmas+0x241/0x370 mm/memory.c:1582
 exit_mmap+0x4d7/0x960 mm/mmap.c:3094
 __mmput+0x154/0x5f0 kernel/fork.c:994
 mmput+0xa7/0xe0 kernel/fork.c:1015
 exit_mm+0x6dd/0x790 kernel/exit.c:545
 do_exit+0xbf7/0x3890 kernel/exit.c:854
 do_group_exit+0x1a0/0x350 kernel/exit.c:970
 get_signal+0x1425/0x1ef0 kernel/signal.c:2468
 do_signal+0x120/0x2090 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop arch/x86/entry/common.c:162 [inline]
 prepare_exit_to_usermode+0x273/0x410 arch/x86/entry/common.c:197
 syscall_return_slowpath+0xdb/0x700 arch/x86/entry/common.c:268
 ret_from_fork+0x15/0x40 arch/x86/entry/entry_64.S:408
RIP: 0033:0x459a19
Code: ff 48 85 f6 0f 84 67 8b fb ff 48 83 ee 10 48 89 4e 08 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 38 00 00 00 0f 05 <48> 85 c0 0f 8c 3e 8b fb ff 74 01 c3 31 ed 48 f7 c7 00 00 01 00 75 
RSP: 002b:00007f0a6d965db0 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: 0000000000000000 RBX: 00007f0a6d966700 RCX: 0000000000459a19
RDX: 00007f0a6d9669d0 RSI: 00007f0a6d965db0 RDI: 00000000003d0f00
RBP: 0000000000a3fd00 R08: 00007f0a6d966700 R09: 00007f0a6d966700
R10: 00007f0a6d9669d0 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000a3fb9f R14: 00007f0a6d9669c0 R15: 0000000000000001
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: ffffea0004903148
---[ end trace 49fe792e792495af ]---
RIP: 0010:__read_once_size include/linux/compiler.h:197 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:142 [inline]
RIP: 0010:PageAnon include/linux/page-flags.h:413 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1324 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1436 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1465 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1486 [inline]
RIP: 0010:unmap_page_range+0x17ec/0x3b60 mm/memory.c:1507
Code: 00 4c 8b b4 24 b0 00 00 00 4c 8b 64 24 40 0f 84 3f 0c 00 00 4d 8d 6c 24 08 4c 8b bc 24 80 00 00 00 4d 85 ff 0f 85 54 03 00 00 <4d> 8b 74 24 08 4c 89 ef e8 c7 36 16 00 48 8b 08 89 c8 83 e0 01 45 
RSP: 0018:ffff8801abdbf2a0 EFLAGS: 00010246
RAX: ffff8801b186f680 RBX: 0000000000000000 RCX: ffff88019d6ef680
RDX: ffff88019d6ef680 RSI: aaaaaaaaaaaab000 RDI: ffffea000a0727a0
RBP: ffff8801abdbf508 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: ffffea0004903140
R13: ffffea0004903148 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f0a6d966700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffea0004903148 CR3: 000000015d4ec000 CR4: 00000000001406e0