[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.239774] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.407185] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.697556] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.581219] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) [ 22.746242] random: sshd: uninitialized urandom read (32 bytes read, 100 bits of entropy available) Warning: Permanently added '10.128.0.11' (ECDSA) to the list of known hosts. [ 28.139425] random: sshd: uninitialized urandom read (32 bytes read, 108 bits of entropy available) executing program [ 28.232101] audit: type=1400 audit(1514973603.227:5): avc: denied { create } for pid=3315 comm="syzkaller022846" 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 [ 28.257140] audit: type=1400 audit(1514973603.257:6): avc: denied { write } for pid=3315 comm="syzkaller022846" path="socket:[8801]" dev="sockfs" ino=8801 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 [ 28.284982] kasan: CONFIG_KASAN_INLINE enabled [ 28.289362] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.302359] Dumping ftrace buffer: [ 28.305864] (ftrace buffer empty) [ 28.309540] Modules linked in: [ 28.312817] CPU: 0 PID: 3315 Comm: syzkaller022846 Not tainted 4.4.107-g610c835 #4 [ 28.320487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.329808] task: ffff8800b5558000 task.stack: ffff8801d0220000 [ 28.335829] RIP: 0010:[] [] netlink_unicast+0x1c0/0x760 [ 28.344487] RSP: 0018:ffff8801d0227780 EFLAGS: 00010293 [ 28.349897] RAX: dffffc0000000048 RBX: dffffc0000000000 RCX: ffffffff82f89609 [ 28.357131] RDX: 0000000000000000 RSI: 00000000024000c0 RDI: ffff8801d1b12718 [ 28.364364] RBP: ffff8801d0227840 R08: ffffed003a28bad7 R09: ffffed003a28bad7 [ 28.371597] R10: 0000000000000005 R11: ffffed003a28bad6 R12: 0000000000000000 [ 28.378829] R13: dffffc0000000000 R14: ffff8801d1b12640 R15: dffffc0000000006 [ 28.386065] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000089f2840 [ 28.394258] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.400104] CR2: 0000000020f81000 CR3: 00000001d3280000 CR4: 00000000001406f0 [ 28.407342] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.414579] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.421812] Stack: [ 28.423924] 1ffff1003a044ef7 ffff8801d145d680 0000000000000240 0000000000000030 [ 28.431867] 1ffff1003a044ef7 dffffc0000000048 0000000000000cf3 0000000041b58ab3 [ 28.439807] ffffffff83ffe7ee ffffffff82f89450 ffff8801d02277f8 0000000000000000 [ 28.447746] Call Trace: [ 28.450300] [] ? netlink_attachskb+0x6c0/0x6c0 [ 28.456498] [] ? __nlmsg_put+0x14c/0x1b0 [ 28.462171] [] netlink_ack+0x231/0x4b0 [ 28.467673] [] nfnetlink_rcv+0xaa2/0x1070 [ 28.473437] [] netlink_unicast+0x522/0x760 [ 28.479285] [] ? netlink_unicast+0x44f/0x760 [ 28.485308] [] ? netlink_attachskb+0x6c0/0x6c0 [ 28.491504] [] netlink_sendmsg+0x8e8/0xc50 [ 28.497350] [] ? netlink_unicast+0x760/0x760 [ 28.503373] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 28.509832] [] ? security_socket_sendmsg+0x89/0xb0 [ 28.516375] [] ? netlink_unicast+0x760/0x760 [ 28.522403] [] sock_sendmsg+0xca/0x110 [ 28.527908] [] sock_write_iter+0x226/0x3b0 [ 28.533754] [] ? avc_has_perm_noaudit+0x460/0x460 [ 28.540208] [] ? sock_sendmsg+0x110/0x110 [ 28.545968] [] ? iov_iter_init+0xaf/0x1d0 [ 28.551729] [] __vfs_write+0x33c/0x450 [ 28.557228] [] ? __vfs_read+0x440/0x440 [ 28.562816] [] ? selinux_file_permission+0x348/0x460 [ 28.569534] [] ? rw_verify_area+0x100/0x2f0 [ 28.575476] [] vfs_write+0x18a/0x530 [ 28.580801] [] SyS_write+0xd9/0x1b0 [ 28.586047] [] ? SyS_read+0x1b0/0x1b0 [ 28.591462] [] ? vmacache_update+0xfe/0x130 [ 28.597397] [] ? do_fast_syscall_32+0xd7/0x890 [ 28.603592] [] ? SyS_read+0x1b0/0x1b0 [ 28.609005] [] do_fast_syscall_32+0x314/0x890 [ 28.615113] [] sysenter_flags_fixed+0xd/0x17 [ 28.621129] Code: 47 45 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 27 45 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 [ 28.647528] RIP [] netlink_unicast+0x1c0/0x760 [ 28.653839] RSP [ 28.658478] ---[ end trace 6d120544f40bb5c4 ]--- [ 28.663219] Kernel panic - not syncing: Fatal exception [ 28.669042] Dumping ftrace buffer: [ 28.672552] (ftrace buffer empty) [ 28.676229] Kernel Offset: disabled [ 28.679822] Rebooting in 86400 seconds..