[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 24.017930] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 24.847803] random: sshd: uninitialized urandom read (32 bytes read) [ 25.146203] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.713534] random: sshd: uninitialized urandom read (32 bytes read) [ 26.275918] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts. [ 31.810141] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 31.906394] kasan: CONFIG_KASAN_INLINE enabled [ 31.911078] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 31.918502] general protection fault: 0000 [#1] SMP KASAN [ 31.924054] CPU: 0 PID: 4647 Comm: syz-executor820 Not tainted 4.19.0-rc1-next-20180831+ #53 [ 31.932610] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.941970] RIP: 0010:rhashtable_walk_start_check+0xd3/0x1400 [ 31.947839] Code: f2 c7 40 30 f2 f2 f2 f2 c7 40 34 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 e4 ba 09 fe 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 0f 85 a4 0f 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b [ 31.966721] RSP: 0018:ffff8801bb96eee8 EFLAGS: 00010246 [ 31.972066] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff852cbf58 [ 31.979562] RDX: 0000000000000000 RSI: ffffffff83730d0c RDI: 0000000000000000 [ 31.986819] RBP: ffff8801bb96f130 R08: ffff8801bae8e080 R09: ffffed003755d744 [ 31.994070] R10: ffffed003755d744 R11: ffff8801baaeba23 R12: 0000000000000000 [ 32.001324] R13: 0000000000000000 R14: ffff8801bb96f270 R15: fffffffffffff000 [ 32.008584] FS: 00000000009ac880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 32.016818] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.022681] CR2: 0000000020000100 CR3: 00000001baf46000 CR4: 00000000001406f0 [ 32.029932] Call Trace: [ 32.032538] ? __kmalloc_node_track_caller+0x33/0x70 [ 32.037637] ? kmem_cache_alloc_node_trace+0x320/0x720 [ 32.042916] ? rhashtable_walk_stop+0x480/0x480 [ 32.047589] ? kasan_unpoison_shadow+0x35/0x50 [ 32.052189] ? kasan_kmalloc+0xc4/0xe0 [ 32.056057] ? __kmalloc_node_track_caller+0x47/0x70 [ 32.061145] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.066662] ? __alloc_skb+0x4c6/0x770 [ 32.070556] ? skb_scrub_packet+0x490/0x490 [ 32.074872] ? kmem_cache_alloc_node_trace+0x6d0/0x720 [ 32.080133] ? __kmalloc_node_track_caller+0x33/0x70 [ 32.085227] ? rcu_read_lock_sched_held+0x108/0x120 [ 32.090253] ? kasan_unpoison_shadow+0x35/0x50 [ 32.094822] tipc_nl_sk_walk+0x52/0x1d0 [ 32.098779] ? __kmalloc_node_track_caller+0x47/0x70 [ 32.103871] ? tipc_send_packet+0x60/0x60 [ 32.108004] tipc_nl_sk_dump+0x24/0x30 [ 32.111881] __tipc_nl_compat_dumpit.isra.11+0x20b/0xad0 [ 32.117314] ? __alloc_skb+0x4c6/0x770 [ 32.121186] ? __tipc_add_link_prop.isra.9+0x2d0/0x2d0 [ 32.126451] ? lock_release+0x9f0/0x9f0 [ 32.130404] ? lock_downgrade+0x8f0/0x8f0 [ 32.134548] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 32.139563] ? skb_put+0x17b/0x1e0 [ 32.143092] tipc_nl_compat_dumpit+0x1f4/0x440 [ 32.147670] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 32.152861] tipc_nl_compat_recv+0x12b3/0x19a0 [ 32.157441] ? tipc_nl_compat_doit+0x650/0x650 [ 32.162006] ? tipc_socket_stop+0x30/0x30 [ 32.166136] ? __tipc_nl_compat_dumpit.isra.11+0xad0/0xad0 [ 32.171748] ? radix_tree_descend+0x13c/0x2e0 [ 32.176230] genl_family_rcv_msg+0x8a3/0x1140 [ 32.180723] ? genl_unregister_family+0x8b0/0x8b0 [ 32.185555] ? __radix_tree_insert+0x8f0/0x8f0 [ 32.190132] ? kasan_check_read+0x11/0x20 [ 32.194310] ? lock_acquire+0x1e4/0x4f0 [ 32.198267] ? genl_rcv+0x19/0x40 [ 32.201709] genl_rcv_msg+0xc6/0x168 [ 32.205406] netlink_rcv_skb+0x172/0x440 [ 32.209454] ? genl_family_rcv_msg+0x1140/0x1140 [ 32.214196] ? netlink_ack+0xbe0/0xbe0 [ 32.218067] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 32.222751] genl_rcv+0x28/0x40 [ 32.226019] netlink_unicast+0x5a0/0x760 [ 32.230066] ? netlink_attachskb+0x9a0/0x9a0 [ 32.234480] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.240002] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 32.245002] netlink_sendmsg+0xa18/0xfc0 [ 32.249047] ? netlink_unicast+0x760/0x760 [ 32.253267] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 32.258180] ? apparmor_socket_sendmsg+0x29/0x30 [ 32.262921] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.268442] ? security_socket_sendmsg+0x94/0xc0 [ 32.273179] ? netlink_unicast+0x760/0x760 [ 32.277398] sock_sendmsg+0xd5/0x120 [ 32.281093] ___sys_sendmsg+0x7fd/0x930 [ 32.285052] ? copy_msghdr_from_user+0x580/0x580 [ 32.289790] ? graph_lock+0x170/0x170 [ 32.293584] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.299107] ? __fget_light+0x2f7/0x440 [ 32.303066] ? fget_raw+0x20/0x20 [ 32.306504] ? __do_page_fault+0x620/0xe50 [ 32.310722] ? lock_downgrade+0x8f0/0x8f0 [ 32.314870] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 32.320390] ? sockfd_lookup_light+0xc5/0x160 [ 32.324868] __sys_sendmsg+0x11d/0x290 [ 32.328759] ? __ia32_sys_shutdown+0x80/0x80 [ 32.333157] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.338678] ? __do_page_fault+0x449/0xe50 [ 32.342900] ? do_syscall_64+0x9a/0x820 [ 32.346857] ? do_syscall_64+0x9a/0x820 [ 32.350816] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 32.355901] __x64_sys_sendmsg+0x78/0xb0 [ 32.359960] do_syscall_64+0x1b9/0x820 [ 32.364180] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 32.369528] ? syscall_return_slowpath+0x5e0/0x5e0 [ 32.374450] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.379276] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 32.384276] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 32.389276] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.394798] ? prepare_exit_to_usermode+0x291/0x3b0 [ 32.399796] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.404626] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.409798] RIP: 0033:0x4400e9 [ 32.412988] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 32.431870] RSP: 002b:00007ffd2abf2c18 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 32.439563] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9 [ 32.446844] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 32.454114] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 32.461370] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970 [ 32.468638] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000 [ 32.475890] Modules linked in: [ 32.479065] Dumping ftrace buffer: [ 32.482588] (ftrace buffer empty) [ 32.486409] ---[ end trace aee6bac8d6066863 ]--- [ 32.491221] RIP: 0010:rhashtable_walk_start_check+0xd3/0x1400 [ 32.497138] Code: f2 c7 40 30 f2 f2 f2 f2 c7 40 34 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 e4 ba 09 fe 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 0f 85 a4 0f 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b [ 32.516063] RSP: 0018:ffff8801bb96eee8 EFLAGS: 00010246 [ 32.521456] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff852cbf58 [ 32.528755] RDX: 0000000000000000 RSI: ffffffff83730d0c RDI: 0000000000000000 [ 32.536060] RBP: ffff8801bb96f130 R08: ffff8801bae8e080 R09: ffffed003755d744 [ 32.543364] R10: ffffed003755d744 R11: ffff8801baaeba23 R12: 0000000000000000 [ 32.550671] R13: 0000000000000000 R14: ffff8801bb96f270 R15: fffffffffffff000 [ 32.557958] FS: 00000000009ac880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 32.566229] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.572124] CR2: 0000000020000100 CR3: 00000001baf46000 CR4: 00000000001406f0 [ 32.579463] Kernel panic - not syncing: Fatal exception [ 32.585130] Dumping ftrace buffer: [ 32.588654] (ftrace buffer empty) [ 32.592340] Kernel Offset: disabled [ 32.595949] Rebooting in 86400 seconds..