[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.628658] 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: [ 20.298426] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 20.555536] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 21.262093] random: sshd: uninitialized urandom read (32 bytes read, 77 bits of entropy available) [ 21.404258] random: sshd: uninitialized urandom read (32 bytes read, 80 bits of entropy available) Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. [ 26.896219] random: sshd: uninitialized urandom read (32 bytes read, 87 bits of entropy available) executing program [ 26.985392] audit: type=1400 audit(1519354903.008:5): avc: denied { create } for pid=3750 comm="syzkaller410724" 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 [ 27.011710] audit: type=1400 audit(1519354903.028:6): avc: denied { write } for pid=3750 comm="syzkaller410724" 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 [ 27.035804] kasan: CONFIG_KASAN_INLINE enabled [ 27.040191] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.053865] Dumping ftrace buffer: [ 27.057372] (ftrace buffer empty) [ 27.061059] Modules linked in: [ 27.064339] CPU: 1 PID: 3750 Comm: syzkaller410724 Not tainted 4.4.116-g17c7c49 #17 [ 27.072097] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.081938] task: ffff8800ad571800 task.stack: ffff8800bb2c0000 [ 27.087964] RIP: 0010:[] [] netlink_unicast+0x1c0/0x760 [ 27.096629] RSP: 0018:ffff8800bb2c7778 EFLAGS: 00010293 [ 27.102044] RAX: dffffc0000000048 RBX: dffffc0000000000 RCX: ffffffff82f88f29 [ 27.109284] RDX: 0000000000000000 RSI: 00000000024000c0 RDI: ffff8801d1c68358 [ 27.116523] RBP: ffff8800bb2c7838 R08: ffffed00399575ca R09: ffffed00399575ca [ 27.123761] R10: 0000000000000000 R11: ffffed00399575c9 R12: 0000000000000000 [ 27.131001] R13: dffffc0000000000 R14: ffff8801d1c68280 R15: dffffc0000000006 [ 27.138243] FS: 0000000000aee880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 27.146444] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.152303] CR2: 00000000203e7ec4 CR3: 00000000ad5c4000 CR4: 0000000000160670 [ 27.159548] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.166787] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.174022] Stack: [ 27.176139] 1ffff10017658ef6 ffff8801ccabad00 0000000000000240 0000000000000030 [ 27.184110] 1ffff10017658ef6 dffffc0000000048 0000000000000ea6 0000000041b58ab3 [ 27.192071] ffffffff84001281 ffffffff82f88d70 ffff8801d1c68280 0000000000000000 [ 27.200031] Call Trace: [ 27.202603] [] ? netlink_attachskb+0x6c0/0x6c0 [ 27.208800] [] ? __nlmsg_put+0x14c/0x1b0 [ 27.214478] [] netlink_ack+0x231/0x4b0 [ 27.219984] [] nfnetlink_rcv+0xaa2/0x1070 [ 27.225751] [] ? netlink_unicast+0x44f/0x760 [ 27.231780] [] ? selinux_nlmsg_lookup+0x312/0x4f0 [ 27.238243] [] netlink_unicast+0x522/0x760 [ 27.244098] [] ? netlink_unicast+0x44f/0x760 [ 27.250127] [] ? netlink_attachskb+0x6c0/0x6c0 [ 27.256329] [] netlink_sendmsg+0x8e8/0xc50 [ 27.262181] [] ? netlink_unicast+0x760/0x760 [ 27.268209] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 27.274672] [] ? security_socket_sendmsg+0x89/0xb0 [ 27.281219] [] ? netlink_unicast+0x760/0x760 [ 27.287246] [] sock_sendmsg+0xca/0x110 [ 27.292748] [] ___sys_sendmsg+0x6c1/0x7c0 [ 27.298512] [] ? copy_msghdr_from_user+0x550/0x550 [ 27.305057] [] ? check_preemption_disabled+0x3b/0x200 [ 27.311866] [] ? __lru_cache_add+0x164/0x240 [ 27.317891] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 27.324877] [] ? _raw_spin_unlock+0x2c/0x50 [ 27.330818] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 27.337799] [] ? __fget_light+0xa1/0x1e0 [ 27.343475] [] ? __fdget+0x18/0x20 [ 27.348636] [] __sys_sendmsg+0xd3/0x190 [ 27.354227] [] ? SyS_shutdown+0x1b0/0x1b0 [ 27.359992] [] ? __do_page_fault+0x290/0xa00 [ 27.366029] [] ? __do_page_fault+0x380/0xa00 [ 27.372053] [] ? move_addr_to_kernel+0x50/0x50 [ 27.378252] [] SyS_sendmsg+0x2d/0x50 [ 27.383591] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 27.390132] 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 [ 27.416653] RIP [] netlink_unicast+0x1c0/0x760 [ 27.422967] RSP [ 27.426653] ---[ end trace 7978d7685980143d ]--- [ 27.431396] Kernel panic - not syncing: Fatal exception [ 27.437181] Dumping ftrace buffer: [ 27.440694] (ftrace buffer empty) [ 27.444375] Kernel Offset: disabled [ 27.447971] Rebooting in 86400 seconds..