[ 20.612537] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 20.997650] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 21.222413] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.092213] random: sshd: uninitialized urandom read (32 bytes read, 95 bits of entropy available) [ 22.266888] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available) Warning: Permanently added '10.128.0.34' (ECDSA) to the list of known hosts. [ 27.685754] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) executing program [ 27.781438] audit: type=1400 audit(1521402469.465:5): avc: denied { create } for pid=3769 comm="syzkaller165316" 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 [ 27.806545] audit: type=1400 audit(1521402469.495:6): avc: denied { write } for pid=3769 comm="syzkaller165316" 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 [ 27.834308] kasan: CONFIG_KASAN_INLINE enabled [ 27.839130] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.852028] Dumping ftrace buffer: [ 27.855542] (ftrace buffer empty) [ 27.859226] Modules linked in: [ 27.862514] CPU: 1 PID: 3769 Comm: syzkaller165316 Not tainted 4.4.120-gd63fdf6 #28 [ 27.870280] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.879607] task: ffff8801c5e24800 task.stack: ffff8801d2550000 [ 27.885638] RIP: 0010:[] [] netlink_unicast+0x1c0/0x760 [ 27.894313] RSP: 0018:ffff8801d2557778 EFLAGS: 00010293 [ 27.899733] RAX: dffffc0000000048 RBX: dffffc0000000000 RCX: ffffffff82f89d89 [ 27.906980] RDX: 0000000000000000 RSI: 00000000024000c0 RDI: ffff8801d9067998 [ 27.914223] RBP: ffff8801d2557838 R08: ffffed0038ef5b76 R09: ffffed0038ef5b76 [ 27.921467] R10: 0000000000000004 R11: ffffed0038ef5b75 R12: 0000000000000000 [ 27.928710] R13: dffffc0000000000 R14: ffff8801d90678c0 R15: dffffc0000000006 [ 27.935954] FS: 00000000009bc880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 27.944152] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.950004] CR2: 0000000020000c80 CR3: 00000001d9824000 CR4: 0000000000160670 [ 27.957252] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.964498] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.971745] Stack: [ 27.973865] 1ffff1003a4aaef6 ffff8801c77adb80 0000000000000240 0000000000000030 [ 27.981859] 1ffff1003a4aaef6 dffffc0000000048 0000000000000eb9 0000000041b58ab3 [ 27.989852] ffffffff84001503 ffffffff82f89bd0 ffff8801d90678c0 0000000000000000 [ 27.997849] Call Trace: [ 28.000410] [] ? netlink_attachskb+0x6c0/0x6c0 [ 28.006618] [] ? __nlmsg_put+0x14c/0x1b0 [ 28.012299] [] netlink_ack+0x231/0x4b0 [ 28.017808] [] nfnetlink_rcv+0xaa2/0x1070 [ 28.023577] [] netlink_unicast+0x522/0x760 [ 28.029435] [] ? netlink_unicast+0x44f/0x760 [ 28.035465] [] ? netlink_attachskb+0x6c0/0x6c0 [ 28.041668] [] netlink_sendmsg+0x8e8/0xc50 [ 28.047525] [] ? netlink_unicast+0x760/0x760 [ 28.053555] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 28.060025] [] ? security_socket_sendmsg+0x89/0xb0 [ 28.066575] [] ? netlink_unicast+0x760/0x760 [ 28.072613] [] sock_sendmsg+0xca/0x110 [ 28.078133] [] ___sys_sendmsg+0x6c1/0x7c0 [ 28.083903] [] ? copy_msghdr_from_user+0x550/0x550 [ 28.090456] [] ? check_preemption_disabled+0x3b/0x200 [ 28.097274] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 28.104263] [] ? _raw_spin_unlock+0x2c/0x50 [ 28.110208] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 28.117197] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 28.123925] [] ? __fget_light+0xa3/0x1e0 [ 28.129607] [] ? __fdget+0x18/0x20 [ 28.134770] [] __sys_sendmsg+0xd3/0x190 [ 28.140366] [] ? SyS_shutdown+0x1b0/0x1b0 [ 28.146140] [] ? vmacache_update+0xfe/0x130 [ 28.152086] [] ? __do_page_fault+0x380/0xa00 [ 28.158121] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 28.165342] [] SyS_sendmsg+0x2d/0x50 [ 28.170680] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 28.177228] Code: e7 6f 3d fe 48 8d 55 98 4c 89 e1 4c 89 f6 48 89 df e8 95 f7 ff ff 83 f8 01 0f 85 e1 03 00 00 e8 c7 6f 3d fe 48 8b 85 68 ff ff ff <0f> b6 00 84 c0 74 08 3c 03 0f 8e 63 05 00 00 41 80 3f 00 41 0f [ 28.204125] RIP [] netlink_unicast+0x1c0/0x760 [ 28.210460] RSP [ 28.214575] ---[ end trace e7d2833f3108d685 ]--- [ 28.219361] Kernel panic - not syncing: Fatal exception [ 28.225147] Dumping ftrace buffer: [ 28.228667] (ftrace buffer empty) [ 28.232349] Kernel Offset: disabled [ 28.235949] Rebooting in 86400 seconds..