[ 21.190965] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [ 21.340891] random: sshd: uninitialized urandom read (32 bytes read, 32 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. [ 21.618391] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.604641] random: sshd: uninitialized urandom read (32 bytes read, 108 bits of entropy available) [ 22.778257] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) Warning: Permanently added '10.128.10.4' (ECDSA) to the list of known hosts. [ 28.210734] random: sshd: uninitialized urandom read (32 bytes read, 120 bits of entropy available) executing program [ 28.310563] audit: type=1400 audit(1521745231.996:5): avc: denied { create } for pid=3779 comm="syzkaller067201" 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 [ 28.336330] audit: type=1400 audit(1521745232.026:6): avc: denied { write } for pid=3779 comm="syzkaller067201" 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 [ 28.360450] kasan: CONFIG_KASAN_INLINE enabled [ 28.364837] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.377762] Dumping ftrace buffer: [ 28.381270] (ftrace buffer empty) [ 28.384950] Modules linked in: [ 28.388227] CPU: 0 PID: 3779 Comm: syzkaller067201 Not tainted 4.4.120-gd63fdf6 #28 [ 28.396006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.405332] task: ffff8801d95c0000 task.stack: ffff8801d9350000 [ 28.411355] RIP: 0010:[] [] netlink_unicast+0x1c0/0x760 [ 28.420024] RSP: 0018:ffff8801d9357778 EFLAGS: 00010293 [ 28.425439] RAX: dffffc0000000048 RBX: dffffc0000000000 RCX: ffffffff82f89d89 [ 28.432680] RDX: 0000000000000000 RSI: 00000000024000c0 RDI: ffff8801cc57c0d8 [ 28.439920] RBP: ffff8801d9357838 R08: ffffed003b258a14 R09: ffffed003b258a14 [ 28.447157] R10: 0000000000000000 R11: ffffed003b258a13 R12: 0000000000000000 [ 28.454410] R13: dffffc0000000000 R14: ffff8801cc57c000 R15: dffffc0000000006 [ 28.461651] FS: 00000000014db880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 28.469855] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.475705] CR2: 0000000020000080 CR3: 00000001c9a90000 CR4: 0000000000160670 [ 28.482947] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.490187] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.497428] Stack: [ 28.499544] 1ffff1003b26aef6 ffff8801d92c4400 0000000000000240 0000000000000030 [ 28.507506] 1ffff1003b26aef6 dffffc0000000048 0000000000000ec3 0000000041b58ab3 [ 28.515471] ffffffff84001503 ffffffff82f89bd0 ffff8801cc57c000 0000000000000000 [ 28.523450] Call Trace: [ 28.526020] [] ? netlink_attachskb+0x6c0/0x6c0 [ 28.532306] [] ? __nlmsg_put+0x14c/0x1b0 [ 28.537984] [] netlink_ack+0x231/0x4b0 [ 28.543491] [] nfnetlink_rcv+0xaa2/0x1070 [ 28.549268] [] netlink_unicast+0x522/0x760 [ 28.555118] [] ? netlink_unicast+0x44f/0x760 [ 28.561143] [] ? netlink_attachskb+0x6c0/0x6c0 [ 28.567346] [] netlink_sendmsg+0x8e8/0xc50 [ 28.573199] [] ? netlink_unicast+0x760/0x760 [ 28.579237] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 28.585706] [] ? security_socket_sendmsg+0x89/0xb0 [ 28.592260] [] ? netlink_unicast+0x760/0x760 [ 28.598292] [] sock_sendmsg+0xca/0x110 [ 28.603797] [] ___sys_sendmsg+0x6c1/0x7c0 [ 28.609565] [] ? copy_msghdr_from_user+0x550/0x550 [ 28.616114] [] ? check_preemption_disabled+0x3b/0x200 [ 28.622927] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 28.629911] [] ? _raw_spin_unlock+0x2c/0x50 [ 28.635873] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 28.642856] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 28.649576] [] ? __fget_light+0xa3/0x1e0 [ 28.655263] [] ? __fdget+0x18/0x20 [ 28.660425] [] __sys_sendmsg+0xd3/0x190 [ 28.666021] [] ? SyS_shutdown+0x1b0/0x1b0 [ 28.671788] [] ? vmacache_update+0xfe/0x130 [ 28.677733] [] ? __do_page_fault+0x380/0xa00 [ 28.683765] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 28.690573] [] SyS_sendmsg+0x2d/0x50 [ 28.695905] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 28.702453] 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 [ 28.729033] RIP [] netlink_unicast+0x1c0/0x760 [ 28.735356] RSP [ 28.739081] ---[ end trace 3b622da6e06078ff ]--- [ 28.743818] Kernel panic - not syncing: Fatal exception [ 28.749595] Dumping ftrace buffer: [ 28.753111] (ftrace buffer empty) [ 28.756790] Kernel Offset: disabled [ 28.760385] Rebooting in 86400 seconds..