Starting mcstransd: [ 22.755481] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.301990] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 26.644016] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 27.581347] random: nonblocking pool is initialized Warning: Permanently added '10.128.15.201' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" executing program [ 34.429607] kasan: CONFIG_KASAN_INLINE enabled [ 34.434028] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 34.446858] Dumping ftrace buffer: [ 34.450370] (ftrace buffer empty) [ 34.454051] Modules linked in: [ 34.457327] CPU: 0 PID: 4027 Comm: syzkaller610587 Not tainted 4.4.114-gfe09418 #3 [ 34.465001] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.474326] task: ffff8800baa397c0 task.stack: ffff8801d73d0000 [ 34.480351] RIP: 0010:[] [] udp_queue_rcv_skb+0x191/0x1560 [ 34.489278] RSP: 0018:ffff8801d73d7928 EFLAGS: 00010206 [ 34.494695] RAX: dffffc0000000000 RBX: ffff8800b9848000 RCX: ffffffff831a8558 [ 34.501936] RDX: 000000000000000c RSI: ffff8801d84dbb40 RDI: 0000000000000060 [ 34.509187] RBP: ffff8801d73d7968 R08: 0000000000000001 R09: 0000000000000001 [ 34.516435] R10: 0000000000000000 R11: 1ffff1003ae7aef6 R12: ffff8801d84dbb40 [ 34.523672] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801d84dbb98 [ 34.530915] FS: 0000000000a3b880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 34.539109] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.544958] CR2: 0000000020319ff0 CR3: 00000001d80ce000 CR4: 0000000000160670 [ 34.552225] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.559463] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.566699] Stack: [ 34.568818] ffff8800b9848088 ffff880000000001 ffff8800b9848088 dffffc0000000000 [ 34.576781] ffff8800b9848000 0000000000000000 ffffed0017309086 ffff8801d84dbb40 [ 34.584745] ffff8801d73d79d8 ffffffff82df7b26 ffff8800b9848188 ffff8800b9848190 [ 34.592712] Call Trace: [ 34.595270] [] release_sock+0x176/0x510 [ 34.600861] [] udp_sendmsg+0x15c4/0x1c30 [ 34.606546] [] ? avc_has_perm_noaudit+0x460/0x460 [ 34.613007] [] ? udp_push_pending_frames+0xe0/0xe0 [ 34.619556] [] ? udp_seq_next+0x80/0x80 [ 34.625153] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 34.632139] [] ? sock_has_perm+0x1c2/0x3e0 [ 34.637991] [] ? sock_has_perm+0x292/0x3e0 [ 34.643843] [] ? sock_has_perm+0x9f/0x3e0 [ 34.649608] [] ? inet_sendmsg+0x201/0x4c0 [ 34.655371] [] inet_sendmsg+0x2bc/0x4c0 [ 34.660965] [] ? inet_sendmsg+0x73/0x4c0 [ 34.666643] [] ? inet_recvmsg+0x4c0/0x4c0 [ 34.672408] [] sock_sendmsg+0xca/0x110 [ 34.677911] [] SYSC_sendto+0x2c8/0x340 [ 34.683414] [] ? SYSC_connect+0x310/0x310 [ 34.689183] [] ? _raw_spin_unlock+0x2c/0x50 [ 34.695129] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 34.702112] [] ? handle_mm_fault+0x3f2/0x3190 [ 34.708224] [] ? SYSC_bind+0x1ad/0x280 [ 34.713730] [] ? __do_page_fault+0x380/0xa00 [ 34.719756] [] ? retint_user+0x18/0x3c [ 34.725259] [] SyS_sendto+0x40/0x50 [ 34.730502] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 34.737046] Code: 74 24 58 41 f6 c6 01 0f 85 7f 07 00 00 e8 38 7d 1b fe 49 83 e6 fe 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 60 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 01 0f 8e 9f 0b 00 00 41 f6 46 60 04 [ 34.763572] RIP [] udp_queue_rcv_skb+0x191/0x1560 [ 34.770152] RSP [ 34.773770] ---[ end trace 53c49469d11cfd9c ]--- [ 34.778504] Kernel panic - not syncing: Fatal exception in interrupt [ 34.785390] Dumping ftrace buffer: [ 34.788912] (ftrace buffer empty) [ 34.792590] Kernel Offset: disabled [ 34.796184] Rebooting in 86400 seconds..