BUG: Bad page map in process syz-executor1 pte:78720007 pmd:b1a8f067 page:ffffea0002d2ac00 count:0 mapcount:-1 mapping:0000000000000000 index:0x0 flags: 0x100000000000000() raw: 0100000000000000 ffffea0002d2ac08 ffffea0002d2ac08 0000000000000000 raw: 0000000000000000 0000000000000000 00000000fffffffe 0000000000000000 raw: 0000000000000000 0000000000000000 0000000000000001 0000000000000000 page dumped because: bad pte addr:00000000cf639169 vm_flags:100400fb anon_vma: (null) mapping:000000003080045d index:1b4 file:kcov fault: (null) mmap:kcov_mmap readpage: (null) CPU: 0 PID: 7784 Comm: syz-executor1 Not tainted 4.18.0-rc8+ #35 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: 0000000000000001 R09: 00000000000a8d2a R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009 R13: 00000000000a8d2a R14: 0000000000000489 R15: badc0ffeebadface BUG: Bad rss-counter state mm:000000009bc453a6 idx:0 val:13 audit: type=1326 audit(1535453791.626:24): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=8192 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x457089 code=0x0 audit: type=1326 audit(1535453791.973:25): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=8208 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x457089 code=0x0 audit: type=1326 audit(1535453792.268:26): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=8227 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x457089 code=0x0 audit: type=1326 audit(1535453792.626:27): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=8244 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x457089 code=0x0