[ 21.307212] random: sshd: uninitialized urandom read (32 bytes read, 34 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: [ 25.008817] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 25.482663] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 26.408189] random: sshd: uninitialized urandom read (32 bytes read, 108 bits of entropy available) [ 26.572004] random: sshd: uninitialized urandom read (32 bytes read, 112 bits of entropy available) Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts. [ 32.021412] random: sshd: uninitialized urandom read (32 bytes read, 120 bits of entropy available) executing program executing program [ 32.135786] IPVS: Creating netns size=2552 id=1 executing program [ 32.157305] kasan: CONFIG_KASAN_INLINE enabled [ 32.161756] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.174684] Dumping ftrace buffer: [ 32.178191] (ftrace buffer empty) [ 32.181876] Modules linked in:[ 32.182689] IPVS: Creating netns size=2552 id=2 [ 32.189511] [ 32.191415] CPU: 0 PID: 3800 Comm: syzkaller391208 Not tainted 4.4.120-gd63fdf6 #28 [ 32.199187] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.203338] kasan: CONFIG_KASAN_INLINE enabled [ 32.213067] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.213067] task: ffff8800aab28000 task.stack: ffff8800bb988000 [ 32.226414] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 32.234646] RSP: 0018:ffff8800bb98f9f0 EFLAGS: 00010a07 [ 32.240064] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b85eb [ 32.247305] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 32.254544] RBP: ffff8800bb98fa00 R08: 0000000048000000 R09: 0000000000001e30 [ 32.261786] R10: 0000000000002100 R11: 1ffff10017731f1c R12: 0000000000000004 [ 32.269026] R13: 0000000000000020 R14: ffff8801c44ea100 R15: dffffc0000000000 [ 32.276269] FS: 00007f1ae49df700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 32.284463] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.290313] CR2: 0000000020e94000 CR3: 00000000af5b4000 CR4: 0000000000160670 [ 32.297557] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.304884] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.312120] Stack: [ 32.314239] 0000000000000246 ffff8801c44ea258 ffff8800bb98fa60 ffffffff825b8611 [ 32.322203] ffff8801c44ea270 ffffed003889d44b ffffed003889d44e ffff8801c44ea268 [ 32.330178] dead4ead00000000 ffff8801c44ea240 0000000000000000 0000000000000000 [ 32.338149] Call Trace: [ 32.340719] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 32.347181] [] sg_finish_rem_req+0x2b5/0x340 [ 32.353208] [] sg_new_read.isra.18+0x17d/0x3c0 [ 32.359410] [] sg_read+0x8bc/0x1490 [ 32.364659] [] ? __check_object_size+0x154/0x35b [ 32.371034] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 32.377670] [] ? fsnotify+0xee0/0xee0 [ 32.383089] [] ? avc_policy_seqno+0x9/0x20 [ 32.388944] [] do_loop_readv_writev+0x141/0x1e0 [ 32.395234] [] ? security_file_permission+0x89/0x1e0 [ 32.401956] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 32.408589] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 32.415220] [] do_readv_writev+0x5dd/0x6e0 [ 32.421075] [] ? vfs_write+0x530/0x530 [ 32.426580] [] ? sg_ioctl+0x29f0/0x29f0 [ 32.432173] [] ? __vfs_write+0x10b/0x450 [ 32.437854] [] ? quarantine_put+0xab/0x180 [ 32.443712] [] ? __fget+0x213/0x3b0 [ 32.448957] [] ? __fget+0x23a/0x3b0 [ 32.454201] [] ? __fget+0x47/0x3b0 [ 32.459359] [] vfs_readv+0x78/0xb0 [ 32.464524] [] SyS_readv+0xd9/0x240 [ 32.469773] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 32.476321] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 32.482785] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 32.489329] Code: c6 a0 0c 00 e9 78 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 49 [ 32.515950] RIP [] __free_pages+0x21/0x90 [ 32.521836] RSP [ 32.525436] general protection fault: 0000 [#2] [ 32.530070] ---[ end trace 22b6cf5f56f58e4e ]--- [ 32.530074] Kernel panic - not syncing: Fatal exception [ 32.540144] PREEMPT SMP KASAN [ 32.543877] Dumping ftrace buffer: [ 32.547402] (ftrace buffer empty) [ 32.551085] Modules linked in: [ 32.554379] CPU: 1 PID: 3803 Comm: syzkaller391208 Tainted: G D 4.4.120-gd63fdf6 #28 [ 32.563355] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.572682] task: ffff8801d8c01800 task.stack: ffff8801c44d8000 [ 32.578726] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 32.586977] RSP: 0018:ffff8801c44df9f0 EFLAGS: 00010a07 [ 32.592396] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b85eb [ 32.599639] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 32.606882] RBP: ffff8801c44dfa00 R08: 0000000048000000 R09: 0000000000001e30 [ 32.614127] R10: 0000000000002100 R11: 1ffff1003889bf1c R12: 0000000000000004 [ 32.621372] R13: 0000000000000020 R14: ffff8800b6218000 R15: dffffc0000000000 [ 32.628618] FS: 00007f1ae49df700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 32.636820] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.642682] CR2: 000000002085dff0 CR3: 00000000ae1a8000 CR4: 0000000000160670 [ 32.649929] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.657175] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.664417] Stack: [ 32.666537] 0000000000000246 ffff8800b6218158 ffff8801c44dfa60 ffffffff825b8611 [ 32.674523] ffff8800b6218170 ffffed0016c4302b ffffed0016c4302e ffff8800b6218168 [ 32.682504] dead4ead00000000 ffff8800b6218140 0000000000000000 0000000000000000 [ 32.690514] Call Trace: [ 32.693077] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 32.699541] [] sg_finish_rem_req+0x2b5/0x340 [ 32.705571] [] sg_new_read.isra.18+0x17d/0x3c0 [ 32.711777] [] sg_read+0x8bc/0x1490 [ 32.717026] [] ? __check_object_size+0x154/0x35b [ 32.723407] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 32.730054] [] ? fsnotify+0xee0/0xee0 [ 32.735479] [] ? avc_policy_seqno+0x9/0x20 [ 32.741336] [] do_loop_readv_writev+0x141/0x1e0 [ 32.747631] [] ? security_file_permission+0x89/0x1e0 [ 32.754359] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 32.761000] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 32.767636] [] do_readv_writev+0x5dd/0x6e0 [ 32.773492] [] ? vfs_write+0x530/0x530 [ 32.779003] [] ? _raw_spin_unlock+0x2c/0x50 [ 32.784955] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 32.791940] [] ? __fget+0x47/0x3b0 [ 32.797101] [] ? avc_policy_seqno+0x9/0x20 [ 32.802957] [] ? __fget+0x213/0x3b0 [ 32.808208] [] ? __fget+0x23a/0x3b0 [ 32.813455] [] ? __fget+0x47/0x3b0 [ 32.818617] [] vfs_readv+0x78/0xb0 [ 32.823777] [] SyS_readv+0xd9/0x240 [ 32.829023] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 32.835576] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 32.842126] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 32.848674] Code: c6 a0 0c 00 e9 78 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 49 [ 32.875486] RIP [] __free_pages+0x21/0x90 [ 32.881635] RSP [ 32.886024] Dumping ftrace buffer: [ 32.889540] (ftrace buffer empty) [ 32.893217] Kernel Offset: disabled [ 32.896813] Rebooting in 86400 seconds..