[ 15.866396] 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. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.989510] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.328419] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 23.133339] random: sshd: uninitialized urandom read (32 bytes read, 82 bits of entropy available) [ 24.226324] random: sshd: uninitialized urandom read (32 bytes read, 88 bits of entropy available) Warning: Permanently added '10.128.0.31' (ECDSA) to the list of known hosts. [ 29.554165] random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available) executing program [ 29.650749] audit: type=1400 audit(1515332349.948:5): avc: denied { create } for pid=3321 comm="syzkaller228747" 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 [ 29.676076] audit: type=1400 audit(1515332349.988:6): avc: denied { write } for pid=3321 comm="syzkaller228747" path="socket:[8931]" dev="sockfs" ino=8931 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 [ 29.704166] kasan: CONFIG_KASAN_INLINE enabled [ 29.708549] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 29.721927] Dumping ftrace buffer: [ 29.725438] (ftrace buffer empty) [ 29.729120] Modules linked in: [ 29.732394] CPU: 1 PID: 3321 Comm: syzkaller228747 Not tainted 4.4.110-gdac1439 #13 [ 29.740148] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.749468] task: ffff8800b59b4740 task.stack: ffff8801d50e8000 [ 29.755487] RIP: 0010:[] [] netlink_unicast+0x1c0/0x760 [ 29.764145] RSP: 0018:ffff8801d50ef780 EFLAGS: 00010293 [ 29.769558] RAX: dffffc0000000048 RBX: dffffc0000000000 RCX: ffffffff82f8abd9 [ 29.776794] RDX: 0000000000000000 RSI: 00000000024000c0 RDI: ffff8801d0f3f498 [ 29.784037] RBP: ffff8801d50ef840 R08: ffffed0016c40b27 R09: ffffed0016c40b27 [ 29.791705] R10: 0000000000000005 R11: ffffed0016c40b26 R12: 0000000000000000 [ 29.798958] R13: dffffc0000000000 R14: ffff8801d0f3f3c0 R15: dffffc0000000006 [ 29.806197] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000093bf840 [ 29.814396] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 29.820243] CR2: 0000000020f81000 CR3: 00000001d5e58000 CR4: 0000000000160670 [ 29.827479] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.834714] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.841956] Stack: [ 29.844072] 1ffff1003aa1def7 ffff8800b6205900 0000000000000240 0000000000000030 [ 29.852017] 1ffff1003aa1def7 dffffc0000000048 0000000000000cf9 0000000041b58ab3 [ 29.859960] ffffffff83fff786 ffffffff82f8aa20 ffff8801d50ef7f8 0000000000000000 [ 29.867911] Call Trace: [ 29.870467] [] ? netlink_attachskb+0x6c0/0x6c0 [ 29.876664] [] ? __nlmsg_put+0x14c/0x1b0 [ 29.882347] [] netlink_ack+0x231/0x4b0 [ 29.887850] [] nfnetlink_rcv+0xaa2/0x1070 [ 29.893614] [] netlink_unicast+0x522/0x760 [ 29.899462] [] ? netlink_unicast+0x44f/0x760 [ 29.905483] [] ? netlink_attachskb+0x6c0/0x6c0 [ 29.911680] [] netlink_sendmsg+0x8e8/0xc50 [ 29.917527] [] ? netlink_unicast+0x760/0x760 [ 29.923549] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 29.930007] [] ? security_socket_sendmsg+0x89/0xb0 [ 29.936548] [] ? netlink_unicast+0x760/0x760 [ 29.943437] [] sock_sendmsg+0xca/0x110 [ 29.948936] [] sock_write_iter+0x226/0x3b0 [ 29.954782] [] ? avc_has_perm_noaudit+0x460/0x460 [ 29.961243] [] ? sock_sendmsg+0x110/0x110 [ 29.967005] [] ? iov_iter_init+0xaf/0x1d0 [ 29.972770] [] __vfs_write+0x33c/0x450 [ 29.978272] [] ? __vfs_read+0x440/0x440 [ 29.983864] [] ? selinux_file_permission+0x348/0x460 [ 29.990583] [] ? rw_verify_area+0x100/0x2f0 [ 29.996521] [] vfs_write+0x18a/0x530 [ 30.001846] [] SyS_write+0xd9/0x1b0 [ 30.007084] [] ? SyS_read+0x1b0/0x1b0 [ 30.012501] [] ? vmacache_update+0xfe/0x130 [ 30.018448] [] ? do_fast_syscall_32+0xd7/0x890 [ 30.024652] [] ? SyS_read+0x1b0/0x1b0 [ 30.030520] [] do_fast_syscall_32+0x314/0x890 [ 30.036630] [] sysenter_flags_fixed+0xd/0x17 [ 30.042653] Code: 87 50 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 67 50 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 [ 30.068964] RIP [] netlink_unicast+0x1c0/0x760 [ 30.075277] RSP [ 30.079436] ---[ end trace 98c4310710ebfa3e ]--- [ 30.084250] Kernel panic - not syncing: Fatal exception [ 30.090315] Dumping ftrace buffer: [ 30.093828] (ftrace buffer empty) [ 30.097507] Kernel Offset: disabled [ 30.101099] Rebooting in 86400 seconds..