[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.822846] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.423320] random: sshd: uninitialized urandom read (32 bytes read) [ 28.808072] random: sshd: uninitialized urandom read (32 bytes read) [ 29.353106] random: sshd: uninitialized urandom read (32 bytes read) [ 29.533370] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.51' (ECDSA) to the list of known hosts. [ 35.233737] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 35.330815] kasan: CONFIG_KASAN_INLINE enabled [ 35.335681] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.343243] general protection fault: 0000 [#1] SMP KASAN [ 35.348810] CPU: 0 PID: 4663 Comm: syz-executor272 Not tainted 4.19.0-rc1+ #78 [ 35.356161] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.365516] RIP: 0010:rhashtable_walk_start_check+0xd3/0x1400 [ 35.371394] 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 94 9e 0b 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 [ 35.390286] RSP: 0018:ffff8801ba726ee8 EFLAGS: 00010246 [ 35.395650] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff852abf68 [ 35.402916] RDX: 0000000000000000 RSI: ffffffff837121ec RDI: 0000000000000000 [ 35.410172] RBP: ffff8801ba727130 R08: ffff8801ba750780 R09: ffffed00374fcf3c [ 35.417428] R10: ffffed00374fcf3c R11: ffff8801ba7e79e3 R12: 0000000000000000 [ 35.424695] R13: 0000000000000000 R14: ffff8801ba727270 R15: fffffffffffff000 [ 35.431951] FS: 0000000001b0b880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 35.440159] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.446021] CR2: 0000000020000100 CR3: 00000001bbf40000 CR4: 00000000001406f0 [ 35.453278] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.460530] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.467787] Call Trace: [ 35.470362] ? __kmalloc_node_track_caller+0x33/0x70 [ 35.475447] ? kmem_cache_alloc_node_trace+0x320/0x720 [ 35.480722] ? rhashtable_walk_stop+0x480/0x480 [ 35.485439] ? kasan_unpoison_shadow+0x35/0x50 [ 35.490024] ? kasan_kmalloc+0xc4/0xe0 [ 35.493906] ? __kmalloc_node_track_caller+0x47/0x70 [ 35.498996] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.504516] ? __alloc_skb+0x4c6/0x770 [ 35.508388] ? skb_scrub_packet+0x490/0x490 [ 35.512795] ? kmem_cache_alloc_node_trace+0x670/0x720 [ 35.518059] ? __kmalloc_node_track_caller+0x33/0x70 [ 35.523147] ? rcu_read_lock_sched_held+0x108/0x120 [ 35.528149] ? kasan_unpoison_shadow+0x35/0x50 [ 35.532718] tipc_nl_sk_walk+0x52/0x1d0 [ 35.536683] ? __kmalloc_node_track_caller+0x47/0x70 [ 35.541787] ? tipc_send_packet+0x60/0x60 [ 35.545919] tipc_nl_sk_dump+0x24/0x30 [ 35.549790] __tipc_nl_compat_dumpit.isra.11+0x20b/0xad0 [ 35.555229] ? __alloc_skb+0x4c6/0x770 [ 35.559155] ? __tipc_add_link_prop.isra.9+0x2d0/0x2d0 [ 35.564495] ? lock_release+0x9f0/0x9f0 [ 35.568472] ? lock_downgrade+0x8f0/0x8f0 [ 35.572613] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 35.577617] ? skb_put+0x17b/0x1e0 [ 35.581147] tipc_nl_compat_dumpit+0x1f4/0x440 [ 35.585813] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 35.590992] tipc_nl_compat_recv+0x12b3/0x19a0 [ 35.595562] ? tipc_nl_compat_doit+0x650/0x650 [ 35.600131] ? tipc_socket_stop+0x30/0x30 [ 35.604263] ? __tipc_nl_compat_dumpit.isra.11+0xad0/0xad0 [ 35.609869] ? radix_tree_descend+0x13c/0x2e0 [ 35.614352] genl_family_rcv_msg+0x8a3/0x1140 [ 35.618832] ? genl_unregister_family+0x8b0/0x8b0 [ 35.623669] ? __radix_tree_insert+0x8f0/0x8f0 [ 35.628240] ? kasan_check_read+0x11/0x20 [ 35.632374] ? lock_acquire+0x1e4/0x4f0 [ 35.636329] ? genl_rcv+0x19/0x40 [ 35.639771] genl_rcv_msg+0xc6/0x168 [ 35.643476] netlink_rcv_skb+0x172/0x440 [ 35.647526] ? genl_family_rcv_msg+0x1140/0x1140 [ 35.652266] ? netlink_ack+0xbe0/0xbe0 [ 35.656146] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 35.660797] genl_rcv+0x28/0x40 [ 35.664059] netlink_unicast+0x5a0/0x760 [ 35.668104] ? netlink_attachskb+0x9a0/0x9a0 [ 35.672499] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.678021] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 35.683020] netlink_sendmsg+0xa18/0xfc0 [ 35.687068] ? netlink_unicast+0x760/0x760 [ 35.691284] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 35.696266] ? apparmor_socket_sendmsg+0x29/0x30 [ 35.701018] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.706594] ? security_socket_sendmsg+0x94/0xc0 [ 35.711343] ? netlink_unicast+0x760/0x760 [ 35.715703] sock_sendmsg+0xd5/0x120 [ 35.719418] ___sys_sendmsg+0x7fd/0x930 [ 35.723385] ? copy_msghdr_from_user+0x580/0x580 [ 35.728233] ? graph_lock+0x170/0x170 [ 35.732026] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.737550] ? __fget_light+0x2f7/0x440 [ 35.741516] ? fget_raw+0x20/0x20 [ 35.744958] ? __do_page_fault+0x620/0xe50 [ 35.749185] ? lock_downgrade+0x8f0/0x8f0 [ 35.753329] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 35.758859] ? sockfd_lookup_light+0xc5/0x160 [ 35.763343] __sys_sendmsg+0x11d/0x290 [ 35.767215] ? __ia32_sys_shutdown+0x80/0x80 [ 35.771613] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.777138] ? __do_page_fault+0x449/0xe50 [ 35.781356] ? do_syscall_64+0x9a/0x820 [ 35.785312] ? do_syscall_64+0x9a/0x820 [ 35.789273] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 35.794364] __x64_sys_sendmsg+0x78/0xb0 [ 35.798410] do_syscall_64+0x1b9/0x820 [ 35.802279] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 35.807629] ? syscall_return_slowpath+0x5e0/0x5e0 [ 35.812561] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.817400] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 35.822410] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.828005] ? prepare_exit_to_usermode+0x291/0x3b0 [ 35.833011] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.837843] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.843018] RIP: 0033:0x4400e9 [ 35.846213] 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 [ 35.865101] RSP: 002b:00007ffe84ec3538 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 35.872792] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9 [ 35.880047] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 35.887299] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 35.894550] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970 [ 35.901802] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000 [ 35.909053] Modules linked in: [ 35.912229] Dumping ftrace buffer: [ 35.915745] (ftrace buffer empty) [ 35.919551] ---[ end trace c8a9aaea5d0de646 ]--- [ 35.924350] RIP: 0010:rhashtable_walk_start_check+0xd3/0x1400 [ 35.930264] 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 94 9e 0b 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 [ 35.949190] RSP: 0018:ffff8801ba726ee8 EFLAGS: 00010246 [ 35.954703] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff852abf68 [ 35.962001] RDX: 0000000000000000 RSI: ffffffff837121ec RDI: 0000000000000000 [ 35.969351] RBP: ffff8801ba727130 R08: ffff8801ba750780 R09: ffffed00374fcf3c [ 35.976656] R10: ffffed00374fcf3c R11: ffff8801ba7e79e3 R12: 0000000000000000 [ 35.983973] R13: 0000000000000000 R14: ffff8801ba727270 R15: fffffffffffff000 [ 35.991267] FS: 0000000001b0b880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 35.999520] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.005415] CR2: 0000000020000100 CR3: 00000001bbf40000 CR4: 00000000001406f0 [ 36.012827] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.020125] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.027543] Kernel panic - not syncing: Fatal exception [ 36.033258] Dumping ftrace buffer: [ 36.036782] (ftrace buffer empty) [ 36.040473] Kernel Offset: disabled [ 36.044078] Rebooting in 86400 seconds..