BUG: Bad page map in process syz-executor2 pte:b2a51007 pmd:10a0df067 page:ffffea00042fde60 count:0 mapcount:-1 mapping:0000000000000000 index:0x0 flags: 0x100000000000000() raw: 0100000000000000 ffffea00042fde68 ffffea00042fde68 0000000000000000 raw: 0000000000000000 0000000000000000 00000000fffffffe 0000000000000000 raw: 0000000000000000 0000000000000000 0000000000000001 0000000000000000 page dumped because: bad pte addr:00000000c8cb933a vm_flags:100400fb anon_vma: (null) mapping:00000000f8d51b69 index:91 file:kcov fault: (null) mmap:kcov_mmap readpage: (null) CPU: 1 PID: 16610 Comm: syz-executor2 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 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 do_syscall_64+0x1ab/0x220 arch/x86/entry/common.c:293 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:00007f4d24f3ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: 0000000000000af6 RBX: 00007f4d24f3f6d4 RCX: 0000000000457089 RDX: 0000000000000003 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d3728 R14: 00000000004c833d R15: 0000000000000001 BUG: Bad rss-counter state mm:00000000fa06a310 idx:0 val:13 IPVS: sh: UDP 172.20.20.170:0 - no destination available audit: type=1326 audit(1534856578.972:12): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=16637 comm="syz-executor6" exe="/root/syz-executor6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x457089 code=0x200000 IPVS: sh: UDP 172.20.20.170:0 - no destination available Unknown ioctl -1072125377 audit: type=1326 audit(1534856579.012:13): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=16637 comm="syz-executor6" exe="/root/syz-executor6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x457089 code=0x200000 Unknown ioctl -1072125377 IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: ftp: loaded support on port[0] = 21 IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: sh: UDP 172.20.20.170:0 - no destination available net_ratelimit: 1 callbacks suppressed IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: ftp: loaded support on port[0] = 21 IPVS: sh: UDP 172.20.20.170:0 - no destination available netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPVS: sh: UDP 172.20.20.170:0 - no destination available device veth0_to_bridge entered promiscuous mode device veth0_to_bridge left promiscuous mode device veth0_to_bridge entered promiscuous mode device veth0_to_bridge left promiscuous mode net_ratelimit: 5 callbacks suppressed IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: sh: UDP 172.20.20.170:0 - no destination available IPVS: sh: UDP 172.20.20.170:0 - no destination available IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready