BUG: Bad page map in process syz-executor1  pte:44698007 pmd:1225ff067
page:ffffea00019a7900 count:0 mapcount:-1 mapping:0000000000000000 index:0x0
flags: 0x100000000000000()
raw: 0100000000000000 ffffea00019a7908 ffffea00019a7908 0000000000000000
raw: 0000000000000000 0000000000000000 00000000fffffffe 0000000000000000
raw: 0000000000000000 0000000000000000 0000000000000001 0000000000000000
page dumped because: bad pte
addr:00000000cd0162c9 vm_flags:100400fb anon_vma:          (null) mapping:0000000073dda955 index:e9
file:kcov fault:          (null) mmap:kcov_mmap readpage:          (null)
CPU: 1 PID: 7593 Comm: syz-executor1 Not tainted 4.19.0-rc1+ #36
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+0x14b/0x190 lib/dump_stack.c:113
 print_bad_pte+0xc47/0xd40 mm/memory.c:774
 zap_pte_range mm/memory.c:1341 [inline]
 zap_pmd_range mm/memory.c:1441 [inline]
 zap_pud_range mm/memory.c:1470 [inline]
 zap_p4d_range mm/memory.c:1491 [inline]
 unmap_page_range+0x1ee7/0x4170 mm/memory.c:1512
 unmap_single_vma+0x445/0x5e0 mm/memory.c:1557
 unmap_vmas+0x251/0x380 mm/memory.c:1587
 exit_mmap+0x4b7/0x940 mm/mmap.c:3093
 __mmput+0x154/0x5f0 kernel/fork.c:1003
 mmput+0xa7/0xe0 kernel/fork.c:1024
 exit_mm+0x6dd/0x790 kernel/exit.c:546
 do_exit+0xbf7/0x3890 kernel/exit.c:856
 do_group_exit+0x1a0/0x350 kernel/exit.c:972
 __do_sys_exit_group+0x21/0x30 kernel/exit.c:983
 __se_sys_exit_group+0x14/0x20 kernel/exit.c:981
 __x64_sys_exit_group+0x4c/0x50 kernel/exit.c:981
 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: 0000000000000001 R09: 0000000000039873
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 0000000000039873 R14: 000000000000001a R15: badc0ffeebadface
BUG: Bad rss-counter state mm:00000000e8bb5a6e idx:0 val:6
sit: non-ECT from 0.0.0.0 with TOS=0x2
sit: non-ECT from 0.0.0.0 with TOS=0x2
netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'.
kernel msg: ebtables bug: please report to author: entries_size too small
IPVS: ftp: loaded support on port[0] = 21
netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'.
capability: warning: `syz-executor4' uses 32-bit capabilities (legacy support in use)
netlink: 'syz-executor0': attribute type 27 has an invalid length.
netlink: 'syz-executor0': attribute type 27 has an invalid length.
nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based  firewall rule not found. Use the iptables CT target to attach helpers instead.