[ 15.638417] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.179245] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.460395] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.338461] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) [ 21.516338] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available) Warning: Permanently added '10.128.0.34' (ECDSA) to the list of known hosts. [ 26.899669] random: sshd: uninitialized urandom read (32 bytes read, 122 bits of entropy available) executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 27.020191] IPVS: Creating netns size=2552 id=1 executing program [ 27.058311] IPVS: Creating netns size=2552 id=2 executing program [ 27.085995] IPVS: Creating netns size=2552 id=3 executing program [ 27.124371] IPVS: Creating netns size=2552 id=4 executing program [ 27.153383] IPVS: Creating netns size=2552 id=5 executing program [ 27.192823] IPVS: Creating netns size=2552 id=6 executing program [ 27.223797] IPVS: Creating netns size=2552 id=7 executing program [ 27.264250] IPVS: Creating netns size=2552 id=8 executing program [ 27.304867] IPVS: Creating netns size=2552 id=9 executing program [ 28.500631] IPVS: Creating netns size=2552 id=10 executing program [ 28.541707] IPVS: Creating netns size=2552 id=11 executing program [ 28.584372] IPVS: Creating netns size=2552 id=12 executing program [ 28.617079] IPVS: Creating netns size=2552 id=13 executing program [ 28.650262] IPVS: Creating netns size=2552 id=14 executing program [ 28.683554] IPVS: Creating netns size=2552 id=15 executing program [ 28.717878] IPVS: Creating netns size=2552 id=16 executing program [ 28.753436] IPVS: Creating netns size=2552 id=17 [ 36.202928] pktgen: kernel_thread() failed for cpu 0 [ 36.208071] pktgen: Cannot create thread for cpu 0 (-4) [ 36.213439] pktgen: kernel_thread() failed for cpu 1 [ 36.218547] pktgen: Cannot create thread for cpu 1 (-4) [ 36.223885] pktgen: Initialization failed for all threads [ 36.293782] kasan: CONFIG_KASAN_INLINE enabled [ 36.298288] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.311537] Dumping ftrace buffer: [ 36.315045] (ftrace buffer empty) [ 36.318720] Modules linked in: [ 36.321990] CPU: 1 PID: 3364 Comm: syzkaller401493 Not tainted 4.4.107-g610c835 #12 [ 36.329750] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.339089] task: ffff8801d119af80 task.stack: ffff8801d0728000 [ 36.345121] RIP: 0010:[] [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 36.354065] RSP: 0018:ffff8801d072fba8 EFLAGS: 00010202 [ 36.359479] RAX: 0000000000000007 RBX: 0000000000000003 RCX: ffffffff82f9da39 [ 36.366723] RDX: 0000000000000000 RSI: ffffffff839fd520 RDI: ffffffff847e4488 [ 36.373960] RBP: ffff8801d072fbd8 R08: 0000000000000001 R09: 0000000000000000 [ 36.382237] R10: 0000000000000000 R11: 1ffff1003a0e5f40 R12: dffffc0000000000 [ 36.389820] R13: ffff8801d20abb48 R14: 0000000000000038 R15: 00000000000000b8 [ 36.397066] FS: 0000000001bb4880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 36.405256] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.412231] CR2: 0000000001ece000 CR3: 00000001d0a08000 CR4: 00000000001406e0 [ 36.421385] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.428638] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.435883] Stack: [ 36.438008] ffffffff82f9d9b0 ffffffff83cc4ae0 ffff8801d0690000 ffff8801d20abb48 [ 36.445987] ffff8801d20abb48 ffff8801d20abb40 ffff8801d072fc08 ffffffff82f959ce [ 36.453958] ffffffff82f95910 ffffffff843dd460 ffff8801d0690ab8 dffffc0000000000 [ 36.461909] Call Trace: [ 36.464472] [] ? nfqnl_nf_hook_drop+0x100/0x3a0 [ 36.470772] [] nf_queue_nf_hook_drop+0xbe/0x1d0 [ 36.477058] [] ? nf_queue_entry_release_refs+0x150/0x150 [ 36.484122] [] nf_unregister_net_hook+0x2ab/0x350 [ 36.490582] [] netfilter_net_exit+0x40/0xb0 [ 36.496519] [] ? nf_unregister_net_hooks+0x60/0x60 [ 36.503062] [] ops_exit_list.isra.4+0xae/0x150 [ 36.509259] [] setup_net+0x221/0x3e0 [ 36.514586] [] ? ops_init+0x3a0/0x3a0 [ 36.520003] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 36.526819] [] copy_net_ns+0xd2/0x190 [ 36.532233] [] create_new_namespaces+0x2f6/0x610 [ 36.538603] [] unshare_nsproxy_namespaces+0xae/0x1e0 [ 36.545321] [] SyS_unshare+0x3da/0x700 [ 36.550834] [] ? SyS_clone+0x50/0x50 [ 36.556169] [] ? SyS_read+0x1b0/0x1b0 [ 36.561589] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 36.568063] [] entry_SYSCALL_64_fastpath+0x16/0x76 [ 36.574603] Code: 65 83 01 00 0f 84 d8 00 00 00 4d 8d 77 38 49 bc 00 00 00 00 00 fc ff df 49 81 c7 b8 00 00 00 e8 f7 00 3c fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f4 01 00 00 49 8b 1e e8 6d 52 2e fe 48 85 [ 36.600868] RIP [] nfqnl_nf_hook_drop+0x190/0x3a0 [ 36.607446] RSP [ 36.611210] ---[ end trace 82556511f7612e17 ]--- [ 36.615953] Kernel panic - not syncing: Fatal exception [ 36.621983] Dumping ftrace buffer: [ 36.625489] (ftrace buffer empty) [ 36.629163] Kernel Offset: disabled [ 36.632752] Rebooting in 86400 seconds..