BUG: Bad page map in process syz-executor0  pte:5a77020fd5c18d00 pmd:19d0c0067
addr:000000008a501924 vm_flags:100400fb anon_vma:          (null) mapping:0000000021c7f476 index:72
PANIC: double fault, error_code: 0x0
file:kcov fault:          (null) mmap:kcov_mmap readpage:          (null)
CPU: 0 PID: 11605 Comm: syz-executor3 Not tainted 4.18.0-rc3+ #58
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
CPU: 1 PID: 11594 Comm: syz-executor0 Not tainted 4.18.0-rc3+ #58
RIP: 0010:__lock_acquire+0x2e/0x5020 kernel/locking/lockdep.c:3294
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Code: 41 
Call Trace:
57 41 
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
89 cf 
41 56 
41 55 
49 89 
fd 41 
 print_bad_pte.cold.116+0x1cd/0x22b mm/memory.c:774
54 45 
89 cc 
53 65 
4c 8b 
 _vm_normal_page+0x29a/0x320 mm/memory.c:856
34 25 
40 ee 
01 00 
48 83 
 zap_pte_range mm/memory.c:1306 [inline]
 zap_pmd_range mm/memory.c:1437 [inline]
 zap_pud_range mm/memory.c:1466 [inline]
 zap_p4d_range mm/memory.c:1487 [inline]
 unmap_page_range+0xa6c/0x2220 mm/memory.c:1508
e4 f0 
48 81 
ec 60 
03 00 
00 48 
8b 45 
10 <89> 
94 24 
80 00 
00 00 
48 ba 
00 00 
00 00 
00 fc 
ff df 
48 89 
84 24 
98 
RSP: 0018:ffff88019c1ffea0 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 1ffff10033840050 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620
RBP: ffff88019c200228 R08: 0000000000000000 R09: 0000000000000000
R10: ffff88019d9c7be0 R11: ffff8801c9ce8cbb R12: 0000000000000000
 unmap_single_vma+0x1a0/0x310 mm/memory.c:1553
R13: ffffffff88f92620 R14: ffff8801c9ce8540 R15: 0000000000000002
FS:  00000000025fc940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
 unmap_vmas+0x120/0x1f0 mm/memory.c:1583
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88019c1ffe98 CR3: 00000001d8f53000 CR4: 00000000001406f0
 exit_mmap+0x2c2/0x5b0 mm/mmap.c:3105
DR0: 0000000000000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace: