BUG: Bad page map in process syz-executor3  pte:521fa007 pmd:12c7df067
page:ffffea0001ecbdc0 count:0 mapcount:-1 mapping:0000000000000000 index:0x0
flags: 0x100000000000000()
raw: 0100000000000000 ffffea0001ecbdc8 ffffea0001ecbdc8 0000000000000000
raw: 0000000000000000 0000000000000000 00000000fffffffe 0000000000000000
raw: 0000000000000000 0000000000000000 0000000000000001 0000000000000000
page dumped because: bad pte
addr:0000000065f05977 vm_flags:100400fb anon_vma:          (null) mapping:00000000b0382249 index:f7
file:kcov fault:          (null) mmap:kcov_mmap readpage:          (null)
CPU: 1 PID: 7700 Comm: syz-executor3 Not tainted 4.18.0-rc8+ #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x17c/0x1c0 lib/dump_stack.c:113
 print_bad_pte+0xcae/0xde0 mm/memory.c:775
 zap_pte_range mm/memory.c:1336 [inline]
 zap_pmd_range mm/memory.c:1436 [inline]
 zap_pud_range mm/memory.c:1465 [inline]
 zap_p4d_range mm/memory.c:1486 [inline]
 unmap_page_range+0x2119/0x3b60 mm/memory.c:1507
 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
 __do_sys_exit_group+0x21/0x30 kernel/exit.c:981
 __se_sys_exit_group+0x14/0x20 kernel/exit.c:979
 __x64_sys_exit_group+0x4c/0x50 kernel/exit.c:979
 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457089
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:0000000000a3fda8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000457089
RDX: 0000000000410c41 RSI: fffffffffffffff7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffff R09: 0000000000036b43
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 0000000000036b43 R14: 0000000000000020 R15: badc0ffeebadface
BUG: Bad rss-counter state mm:000000005f9e7f26 idx:0 val:6
audit: type=1326 audit(1534777235.668:3): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=7744 comm="syz-executor2" exe="/root/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x457089 code=0x0
devpts: called with bogus options
devpts: called with bogus options
audit: type=1326 audit(1534777235.976:4): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=7744 comm="syz-executor2" exe="/root/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x457089 code=0x0
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
Unknown ioctl 21531
Unknown ioctl 21531
kernel msg: ebtables bug: please report to author: Wrong len argument
misc userio: Invalid payload size
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: Scheduler module ip_vs_non not found