[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 17.913697] 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: [ 21.192619] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 21.535252] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 22.221204] random: sshd: uninitialized urandom read (32 bytes read, 78 bits of entropy available) [ 29.024864] random: sshd: uninitialized urandom read (32 bytes read, 86 bits of entropy available) Warning: Permanently added '10.128.0.47' (ECDSA) to the list of known hosts. [ 34.404253] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available) executing program [ 34.486958] audit: type=1400 audit(1519354813.007:5): avc: denied { create } for pid=3774 comm="syzkaller055528" 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 [ 34.513216] audit: type=1400 audit(1519354813.037:6): avc: denied { write } for pid=3774 comm="syzkaller055528" 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 [ 34.537262] kasan: CONFIG_KASAN_INLINE enabled [ 34.541639] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 34.554561] Dumping ftrace buffer: [ 34.558068] (ftrace buffer empty) [ 34.561749] Modules linked in: [ 34.565028] CPU: 0 PID: 3774 Comm: syzkaller055528 Not tainted 4.4.116-g17c7c49 #18 [ 34.572799] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.582125] task: ffff8800bb9d0000 task.stack: ffff8800bb9d8000 [ 34.588148] RIP: 0010:[] [] netlink_unicast+0x1c0/0x760 [ 34.596814] RSP: 0018:ffff8800bb9df6f8 EFLAGS: 00010293 [ 34.602229] RAX: dffffc0000000048 RBX: dffffc0000000000 RCX: ffffffff82f88f29 [ 34.609478] RDX: 0000000000000000 RSI: 00000000024000c0 RDI: ffff8800b05f2718 [ 34.616718] RBP: ffff8800bb9df7b8 R08: ffffed0038b7ae5a R09: ffffed0038b7ae5a [ 34.624204] R10: 0000000000000000 R11: ffffed0038b7ae59 R12: 0000000000000000 [ 34.631444] R13: dffffc0000000000 R14: ffff8800b05f2640 R15: dffffc0000000006 [ 34.638683] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009396840 [ 34.646879] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 34.652738] CR2: 00000000203e7ec4 CR3: 00000000b1876000 CR4: 0000000000160670 [ 34.659984] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.667223] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.674474] Stack: [ 34.676592] 1ffff1001773bee6 ffff8801c5bd7180 0000000000000240 0000000000000030 [ 34.684562] 1ffff1001773bee6 dffffc0000000048 0000000000000ebe 0000000041b58ab3 [ 34.692530] ffffffff84001281 ffffffff82f88d70 ffff8800b05f2640 0000000000000000 [ 34.700495] Call Trace: [ 34.703052] [] ? netlink_attachskb+0x6c0/0x6c0 [ 34.709250] [] ? __nlmsg_put+0x14c/0x1b0 [ 34.714931] [] netlink_ack+0x231/0x4b0 [ 34.720436] [] nfnetlink_rcv+0xaa2/0x1070 [ 34.726202] [] ? netlink_unicast+0x44f/0x760 [ 34.732230] [] ? selinux_nlmsg_lookup+0x312/0x4f0 [ 34.738690] [] netlink_unicast+0x522/0x760 [ 34.744540] [] ? netlink_unicast+0x44f/0x760 [ 34.750565] [] ? netlink_attachskb+0x6c0/0x6c0 [ 34.756762] [] netlink_sendmsg+0x8e8/0xc50 [ 34.762616] [] ? netlink_unicast+0x760/0x760 [ 34.768656] [] ? move_addr_to_kernel.part.12+0xc5/0x110 [ 34.775644] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 34.782106] [] ? security_socket_sendmsg+0x89/0xb0 [ 34.788655] [] ? netlink_unicast+0x760/0x760 [ 34.794691] [] sock_sendmsg+0xca/0x110 [ 34.800217] [] ___sys_sendmsg+0x6c1/0x7c0 [ 34.805980] [] ? copy_msghdr_from_user+0x550/0x550 [ 34.812527] [] ? __alloc_pages_direct_compact+0x250/0x250 [ 34.819679] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 34.826659] [] ? kasan_unpoison_shadow+0x35/0x50 [ 34.833030] [] ? check_preemption_disabled+0x3b/0x200 [ 34.839839] [] ? check_preemption_disabled+0x3b/0x200 [ 34.846645] [] ? __lru_cache_add+0x164/0x240 [ 34.852672] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 34.859654] [] ? __fget_light+0xa1/0x1e0 [ 34.865330] [] ? __fdget+0x18/0x20 [ 34.870487] [] ? sockfd_lookup_light+0x118/0x160 [ 34.876859] [] __sys_sendmsg+0xd3/0x190 [ 34.882452] [] ? SyS_shutdown+0x1b0/0x1b0 [ 34.888230] [] ? __do_page_fault+0x380/0xa00 [ 34.894263] [] compat_SyS_sendmsg+0x2a/0x40 [ 34.900204] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 34.906751] [] do_fast_syscall_32+0x314/0x890 [ 34.912866] [] sysenter_flags_fixed+0xd/0x17 [ 34.918887] Code: 57 7e 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 37 7e 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 [ 34.945461] RIP [] netlink_unicast+0x1c0/0x760 [ 34.951778] RSP [ 34.955918] ---[ end trace 95c2013921d7cfda ]--- [ 34.960667] Kernel panic - not syncing: Fatal exception [ 34.966337] Dumping ftrace buffer: [ 34.969849] (ftrace buffer empty) [ 34.973526] Kernel Offset: disabled [ 34.977122] Rebooting in 86400 seconds..