[ 20.401961] random: sshd: uninitialized urandom read (32 bytes read, 33 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: [ 24.782831] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 25.153580] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 26.126783] random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available) [ 39.830555] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.45' (ECDSA) to the list of known hosts. executing program executing program [ 45.494024] kasan: CONFIG_KASAN_INLINE enabled [ 45.498455] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.511259] Dumping ftrace buffer: [ 45.514764] (ftrace buffer empty) [ 45.518442] Modules linked in: [ 45.521734] CPU: 0 PID: 3755 Comm: syzkaller238259 Not tainted 4.4.120-gd63fdf6 #28 [ 45.529489] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.538809] task: ffff8800bbbe9800 task.stack: ffff8800bacc0000 [ 45.544830] RIP: 0010:[] [] udp_queue_rcv_skb+0x191/0x1560 [ 45.553747] RSP: 0018:ffff8800bacc7928 EFLAGS: 00010206 [ 45.559160] RAX: dffffc0000000000 RBX: ffff8800bb2d0000 RCX: ffffffff831aa228 [ 45.566393] RDX: 000000000000000c RSI: ffff8800b4e8d8c0 RDI: 0000000000000060 [ 45.573629] RBP: ffff8800bacc7968 R08: 0000000000000001 R09: 0000000000000001 [ 45.580866] R10: 0000000000000000 R11: 1ffff10017598ef6 R12: ffff8800b4e8d8c0 [ 45.588103] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8800b4e8d918 [ 45.595338] FS: 0000000001b7c880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 45.603530] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.609377] CR2: 000000002082dff0 CR3: 00000000bb040000 CR4: 0000000000160670 [ 45.616615] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.623853] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.631085] Stack: [ 45.633201] ffff8800bb2d0088 ffff880000000001 ffff8800bb2d0088 dffffc0000000000 [ 45.641156] ffff8800bb2d0000 0000000000000000 ffffed001765a086 ffff8800b4e8d8c0 [ 45.649115] ffff8800bacc79d8 ffffffff82df8cb6 ffff8800bb2d0188 ffff8800bb2d0190 [ 45.657070] Call Trace: [ 45.659626] [] release_sock+0x176/0x510 [ 45.665216] [] udp_sendmsg+0x15c4/0x1c30 [ 45.670899] [] ? avc_has_perm_noaudit+0x460/0x460 [ 45.677358] [] ? udp_push_pending_frames+0xe0/0xe0 [ 45.683921] [] ? udp_seq_next+0x80/0x80 [ 45.689510] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 45.696488] [] ? sock_has_perm+0x1c1/0x400 [ 45.702335] [] ? sock_has_perm+0x29f/0x400 [ 45.708184] [] ? sock_has_perm+0x9f/0x400 [ 45.713948] [] ? inet_sendmsg+0x201/0x4c0 [ 45.719707] [] inet_sendmsg+0x2bc/0x4c0 [ 45.725295] [] ? inet_sendmsg+0x73/0x4c0 [ 45.730969] [] ? inet_recvmsg+0x4c0/0x4c0 [ 45.736734] [] sock_sendmsg+0xca/0x110 [ 45.742234] [] SYSC_sendto+0x2c8/0x340 [ 45.747736] [] ? SYSC_connect+0x310/0x310 [ 45.753499] [] ? _raw_spin_unlock+0x2c/0x50 [ 45.759753] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 45.766735] [] ? handle_mm_fault+0x3f2/0x3190 [ 45.772846] [] ? SYSC_bind+0x1ad/0x280 [ 45.778351] [] ? __do_page_fault+0x380/0xa00 [ 45.784376] [] ? retint_user+0x18/0x3c [ 45.789876] [] SyS_sendto+0x40/0x50 [ 45.795119] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 45.801660] Code: 74 24 58 41 f6 c6 01 0f 85 7f 07 00 00 e8 28 6b 1b fe 49 83 e6 fe 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 60 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 01 0f 8e 9f 0b 00 00 41 f6 46 60 04 [ 45.828084] RIP [] udp_queue_rcv_skb+0x191/0x1560 [ 45.834658] RSP [ 45.838278] ---[ end trace ee92890da9ad1ce5 ]--- [ 45.843007] Kernel panic - not syncing: Fatal exception in interrupt [ 45.849819] Dumping ftrace buffer: [ 45.853323] (ftrace buffer empty) [ 45.856999] Kernel Offset: disabled [ 45.860591] Rebooting in 86400 seconds..