[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.412187] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.115484] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.521511] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 23.377665] random: sshd: uninitialized urandom read (32 bytes read, 92 bits of entropy available) [ 31.612315] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available) Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts. [ 37.205275] random: sshd: uninitialized urandom read (32 bytes read, 107 bits of entropy available) executing program [ 37.293911] audit: type=1400 audit(1516905091.607:5): avc: denied { create } for pid=3329 comm="syzkaller476655" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 37.320888] audit: type=1400 audit(1516905091.637:6): avc: denied { write } for pid=3329 comm="syzkaller476655" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 37.345163] kasan: CONFIG_KASAN_INLINE enabled [ 37.349551] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.362371] Dumping ftrace buffer: [ 37.365890] (ftrace buffer empty) [ 37.369573] Modules linked in: [ 37.372854] CPU: 1 PID: 3329 Comm: syzkaller476655 Not tainted 4.4.113-ge70c132 #34 [ 37.380622] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.389961] task: ffff8800b461af80 task.stack: ffff8800b47f8000 [ 37.395991] RIP: 0010:[] [] __lock_acquire+0x5c9/0x4b50 [ 37.404661] RSP: 0018:ffff8800b47ff460 EFLAGS: 00010006 [ 37.410082] RAX: dffffc0000000000 RBX: ffff8800b461af80 RCX: 0000000000000000 [ 37.417326] RDX: 0000000000000005 RSI: 0000000000000001 RDI: 0000000000000028 [ 37.424582] RBP: ffff8800b47ff600 R08: 0000000000000001 R09: 0000000000000000 [ 37.431825] R10: 0000000000000001 R11: 1ffff100168ffe9e R12: 0000000000000000 [ 37.439064] R13: ffff8800b461af80 R14: 0000000000000028 R15: 0000000000000000 [ 37.446308] FS: 0000000001566880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 37.454505] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.460358] CR2: 0000000020023000 CR3: 00000000b4d78000 CR4: 0000000000160670 [ 37.467602] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.474846] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.482088] Stack: [ 37.484207] ffffffff842bdba0 0000000000000000 ffff8800b47ff620 ffffffff81236f1f [ 37.492175] 0000000041b58ab3 ffffffff83fb1858 ffffffff812363c0 0000000082e0107b [ 37.500165] dffffc0000000000 ffff8800b461b830 ffff8800b461b7e0 ffff8800b461b7e8 [ 37.508169] Call Trace: [ 37.510731] [] ? __lock_acquire+0xb5f/0x4b50 [ 37.516764] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 37.523775] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 37.530759] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 37.537745] [] ? __lock_acquire+0xb5f/0x4b50 [ 37.543773] [] lock_acquire+0x15e/0x460 [ 37.549370] [] ? nfulnl_recv_config+0x935/0x1430 [ 37.555770] [] ? get_parent_ip+0xd/0x50 [ 37.561369] [] _raw_spin_lock_bh+0x3a/0x50 [ 37.567227] [] ? nfulnl_recv_config+0x935/0x1430 [ 37.573604] [] nfulnl_recv_config+0x935/0x1430 [ 37.579804] [] ? nfulnl_recv_config+0x7f/0x1430 [ 37.586101] [] ? nfulnl_log_packet+0x2290/0x2290 [ 37.592481] [] nfnetlink_rcv_msg+0xa63/0xbc0 [ 37.598513] [] ? nfnetlink_rcv_msg+0x3d6/0xbc0 [ 37.604722] [] netlink_rcv_skb+0x13e/0x370 [ 37.610587] [] ? nfnetlink_bind+0x250/0x250 [ 37.616529] [] nfnetlink_rcv+0x29e/0x1070 [ 37.622314] [] netlink_unicast+0x522/0x760 [ 37.628167] [] ? netlink_unicast+0x44f/0x760 [ 37.634199] [] ? netlink_attachskb+0x6c0/0x6c0 [ 37.640412] [] netlink_sendmsg+0x8e8/0xc50 [ 37.646272] [] ? netlink_unicast+0x760/0x760 [ 37.652306] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 37.658769] [] ? security_socket_sendmsg+0x89/0xb0 [ 37.665344] [] ? netlink_unicast+0x760/0x760 [ 37.671376] [] sock_sendmsg+0xca/0x110 [ 37.676892] [] ___sys_sendmsg+0x6c1/0x7c0 [ 37.682659] [] ? copy_msghdr_from_user+0x550/0x550 [ 37.689209] [] ? check_preemption_disabled+0x3b/0x200 [ 37.696025] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 37.703016] [] ? _raw_spin_unlock+0x2c/0x50 [ 37.708957] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 37.715944] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 37.722676] [] ? __fget_light+0xa1/0x1e0 [ 37.728356] [] ? __fdget+0x18/0x20 [ 37.733521] [] __sys_sendmsg+0xd3/0x190 [ 37.739113] [] ? SyS_shutdown+0x1b0/0x1b0 [ 37.744883] [] ? __do_page_fault+0x380/0xa00 [ 37.750912] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 37.757728] [] SyS_sendmsg+0x2d/0x50 [ 37.763162] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 37.769712] Code: 25 28 00 00 00 0f 85 0e 31 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 94 32 00 00 49 81 3e 20 39 a2 84 41 ba 00 00 [ 37.796554] RIP [] __lock_acquire+0x5c9/0x4b50 [ 37.802893] RSP [ 37.806495] ---[ end trace 9b5fca9472a60778 ]--- [ 37.811231] Kernel panic - not syncing: Fatal exception in interrupt [ 37.818106] Dumping ftrace buffer: [ 37.821621] (ftrace buffer empty) [ 37.825314] Kernel Offset: disabled [ 37.828923] Rebooting in 86400 seconds..