kauditd_printk_skb: 9 callbacks suppressed audit: type=1804 audit(1542996654.691:562): pid=29860 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor2" name="/root/syzkaller-testdir056545513/syzkaller.Aq9Vt1/2234/file0/bus" dev="overlay" ino=378734 res=1 overlayfs: filesystem on './file0' not supported as upperdir WARNING: CPU: 0 PID: 29872 at net/netfilter/nfnetlink_cttimeout.c:478 cttimeout_default_get+0x1df/0xb30 net/netfilter/nfnetlink_cttimeout.c:478 kobject: 'kvm' (00000000593d3bc5): kobject_uevent_env Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 29872 Comm: syz-executor3 Not tainted 4.20.0-rc3+ #124 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+0x244/0x39d lib/dump_stack.c:113 panic+0x2ad/0x55c kernel/panic.c:188 kobject: 'kvm' (00000000593d3bc5): fill_kobj_path: path = '/devices/virtual/misc/kvm' __warn.cold.8+0x20/0x45 kernel/panic.c:540 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 RIP: 0010:cttimeout_default_get+0x1df/0xb30 net/netfilter/nfnetlink_cttimeout.c:478 Code: 00 0f 87 8d 00 00 00 41 80 ff 06 0f 84 94 07 00 00 41 80 ff 11 0f 84 6c 07 00 00 41 80 ff 01 0f 84 44 07 00 00 e8 11 14 15 fb <0f> 0b 41 bd a1 ff ff ff eb 06 41 bd a1 ff ff ff e8 fc 13 15 fb 48 RSP: 0018:ffff88817b99f2b0 EFLAGS: 00010216 RAX: 0000000000040000 RBX: ffffffff88c16080 RCX: ffffc9000be3a000 RDX: 00000000000004ee RSI: ffffffff866a76df RDI: 0000000000000001 RBP: ffff88817b99f3c0 R08: ffff8881b231e400 R09: ffffed103b5c5b67 R10: 0000000000000002 R11: ffff8881dae2db3b R12: 000000000000002f R13: ffff8881d1893340 R14: 0000000000000017 R15: 000000000000002f nfnetlink_rcv_msg+0xdd3/0x10c0 net/netfilter/nfnetlink.c:228 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x1c0/0x4d0 net/netfilter/nfnetlink.c:560 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2116 __sys_sendmsg+0x11d/0x280 net/socket.c:2154 __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg net/socket.c:2161 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f624e6d3c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000020dddfc8 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f624e6d46d4 R13: 00000000004c3fea R14: 00000000004d6820 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..