[ 20.961595] 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: [ 24.696170] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 25.064971] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 25.984454] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available) [ 27.912996] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts. [ 33.473604] random: sshd: uninitialized urandom read (32 bytes read, 120 bits of entropy available) executing program executing program [ 33.609860] kasan: CONFIG_KASAN_INLINE enabled [ 33.614286] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.627117] Dumping ftrace buffer: [ 33.630625] (ftrace buffer empty) [ 33.634303] Modules linked in: [ 33.637582] CPU: 0 PID: 3790 Comm: syzkaller355987 Not tainted 4.4.119-g855ea74 #27 [ 33.645341] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.654673] task: ffff8801c8379800 task.stack: ffff8801c5ea8000 [ 33.660698] RIP: 0010:[] [] udp_queue_rcv_skb+0x191/0x1560 [ 33.669627] RSP: 0018:ffff8801c5eaf928 EFLAGS: 00010206 [ 33.675045] RAX: dffffc0000000000 RBX: ffff8801d9300000 RCX: ffffffff831aa048 [ 33.682286] RDX: 000000000000000c RSI: ffff8801d1a4d280 RDI: 0000000000000060 [ 33.689528] RBP: ffff8801c5eaf968 R08: 0000000000000001 R09: 0000000000000001 [ 33.696769] R10: 0000000000000000 R11: 1ffff10038bd5ef6 R12: ffff8801d1a4d280 [ 33.704007] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801d1a4d2d8 [ 33.711251] FS: 0000000001e24880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 33.719445] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.725297] CR2: 0000000020000040 CR3: 00000001d94e4000 CR4: 0000000000160670 [ 33.732538] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.739778] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.747017] Stack: [ 33.749135] ffff8801d9300088 ffff880100000001 ffff8801d9300088 dffffc0000000000 [ 33.757102] ffff8801d9300000 0000000000000000 ffffed003b260086 ffff8801d1a4d280 [ 33.765072] ffff8801c5eaf9d8 ffffffff82df8ad6 ffff8801d9300188 ffff8801d9300190 [ 33.773055] Call Trace: [ 33.775616] [] release_sock+0x176/0x510 [ 33.781208] [] udp_sendmsg+0x15c4/0x1c30 [ 33.786892] [] ? avc_has_perm_noaudit+0x460/0x460 [ 33.793362] [] ? udp_push_pending_frames+0xe0/0xe0 [ 33.799910] [] ? udp_seq_next+0x80/0x80 [ 33.805503] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 33.812486] [] ? sock_has_perm+0x1c1/0x400 [ 33.818337] [] ? sock_has_perm+0x29f/0x400 [ 33.824193] [] ? sock_has_perm+0x9f/0x400 [ 33.829962] [] ? inet_sendmsg+0x201/0x4c0 [ 33.836005] [] inet_sendmsg+0x2bc/0x4c0 [ 33.841595] [] ? inet_sendmsg+0x73/0x4c0 [ 33.847274] [] ? inet_recvmsg+0x4c0/0x4c0 [ 33.853041] [] sock_sendmsg+0xca/0x110 [ 33.858549] [] SYSC_sendto+0x2c8/0x340 [ 33.864053] [] ? SYSC_connect+0x310/0x310 [ 33.869818] [] ? udp_v4_get_port+0x139/0x180 [ 33.875845] [] ? inet_bind+0xb0/0x880 [ 33.881264] [] ? SYSC_bind+0x1ad/0x280 [ 33.886770] [] ? vmacache_update+0xfe/0x130 [ 33.892710] [] ? __do_page_fault+0x380/0xa00 [ 33.898741] [] ? retint_user+0x18/0x3c [ 33.904245] [] SyS_sendto+0x40/0x50 [ 33.909489] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 33.916035] Code: 74 24 58 41 f6 c6 01 0f 85 7f 07 00 00 e8 c8 6c 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 [ 33.942685] RIP [] udp_queue_rcv_skb+0x191/0x1560 [ 33.949267] RSP [ 33.952899] ---[ end trace 297ee67236af3861 ]--- [ 33.957655] Kernel panic - not syncing: Fatal exception in interrupt [ 33.964541] Dumping ftrace buffer: [ 33.968051] (ftrace buffer empty) [ 33.971731] Kernel Offset: disabled [ 33.975324] Rebooting in 86400 seconds..