[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.051041] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.703892] random: sshd: uninitialized urandom read (32 bytes read, 42 bits of entropy available) [ 26.174295] random: sshd: uninitialized urandom read (32 bytes read, 42 bits of entropy available) [ 27.165156] random: sshd: uninitialized urandom read (32 bytes read, 124 bits of entropy available) [ 27.326850] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.7' (ECDSA) to the list of known hosts. executing program executing program executing program [ 32.850606] IPVS: Creating netns size=2552 id=1 executing program [ 32.872807] kasan: CONFIG_KASAN_INLINE enabled [ 32.877252] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.890131] Dumping ftrace buffer: [ 32.893637] (ftrace buffer empty) [ 32.897324] Modules linked in:[ 32.898128] IPVS: Creating netns size=2552 id=2 [ 32.904962] [ 32.906874] CPU: 0 PID: 3792 Comm: syzkaller111655 Not tainted 4.4.120-gd63fdf6 #28 [ 32.914645] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.918496] kasan: CONFIG_KASAN_INLINE enabled [ 32.928528] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.928529] task: ffff8800b4ae9800 task.stack: ffff8800bb310000 [ 32.941878] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 32.950112] RSP: 0018:ffff8800bb3179f0 EFLAGS: 00010a07 [ 32.955531] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b85eb [ 32.962770] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 32.970009] RBP: ffff8800bb317a00 R08: 0000000048000000 R09: 0000000000001e30 [ 32.977248] R10: 0000000000002100 R11: 1ffff10017662f1c R12: 0000000000000004 [ 32.984489] R13: 0000000000000020 R14: ffff8801d936c200 R15: dffffc0000000000 [ 32.991731] FS: 00007f824e6d9700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 32.999926] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.005775] CR2: 0000000020e94000 CR3: 00000000b13d0000 CR4: 0000000000160670 [ 33.013017] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.020256] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.027492] Stack: [ 33.029611] 0000000000000246 ffff8801d936c358 ffff8800bb317a60 ffffffff825b8611 [ 33.037588] ffff8801d936c370 ffffed003b26d86b ffffed003b26d86e ffff8801d936c368 [ 33.045569] dead4ead00000000 ffff8801d936c340 0000000000000000 0000000000000000 [ 33.053538] Call Trace: [ 33.056103] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 33.062564] [] sg_finish_rem_req+0x2b5/0x340 [ 33.068593] [] sg_new_read.isra.18+0x17d/0x3c0 [ 33.074794] [] sg_read+0x8bc/0x1490 [ 33.080040] [] ? __check_object_size+0x154/0x35b [ 33.086414] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 33.093137] [] ? fsnotify+0xee0/0xee0 [ 33.098558] [] ? avc_policy_seqno+0x9/0x20 [ 33.104413] [] do_loop_readv_writev+0x141/0x1e0 [ 33.110701] [] ? security_file_permission+0x89/0x1e0 [ 33.117423] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 33.124061] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 33.130698] [] do_readv_writev+0x5dd/0x6e0 [ 33.136551] [] ? vfs_write+0x530/0x530 [ 33.142058] [] ? sg_ioctl+0x29f0/0x29f0 [ 33.147655] [] ? __vfs_write+0x10b/0x450 [ 33.153335] [] ? quarantine_put+0xab/0x180 [ 33.159191] [] ? __fget+0x213/0x3b0 [ 33.164437] [] ? __fget+0x23a/0x3b0 [ 33.169683] [] ? __fget+0x47/0x3b0 [ 33.174842] [] vfs_readv+0x78/0xb0 [ 33.180004] [] SyS_readv+0xd9/0x240 [ 33.185252] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 33.191800] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 33.198267] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 33.204812] 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 [ 33.231503] RIP [] __free_pages+0x21/0x90 [ 33.237392] RSP [ 33.240995] general protection fault: 0000 [#2] [ 33.245542] ---[ end trace 721f20f315e18ed5 ]--- [ 33.245547] Kernel panic - not syncing: Fatal exception [ 33.255629] PREEMPT SMP KASAN [ 33.259368] Dumping ftrace buffer: [ 33.262879] (ftrace buffer empty) [ 33.266561] Modules linked in: [ 33.269854] CPU: 1 PID: 3795 Comm: syzkaller111655 Tainted: G D 4.4.120-gd63fdf6 #28 [ 33.278833] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.288161] task: ffff8801d9793000 task.stack: ffff8801d2e78000 [ 33.294189] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 33.302456] RSP: 0018:ffff8801d2e7f9f0 EFLAGS: 00010a07 [ 33.307878] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b85eb [ 33.315125] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 33.322368] RBP: ffff8801d2e7fa00 R08: 0000000048000000 R09: 0000000000001e30 [ 33.329612] R10: 0000000000002100 R11: 1ffff1003a5cff1c R12: 0000000000000004 [ 33.336856] R13: 0000000000000020 R14: ffff8801c5e38000 R15: dffffc0000000000 [ 33.344101] FS: 00007f824e6d9700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 33.352300] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.358167] CR2: 000000002085dff0 CR3: 00000000b012c000 CR4: 0000000000160670 [ 33.365427] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.372669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.379909] Stack: [ 33.382029] 0000000000000246 ffff8801c5e38158 ffff8801d2e7fa60 ffffffff825b8611 [ 33.390010] ffff8801c5e38170 ffffed0038bc702b ffffed0038bc702e ffff8801c5e38168 [ 33.397995] dead4ead00000000 ffff8801c5e38140 0000000000000000 0000000000000000 [ 33.405991] Call Trace: [ 33.408558] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 33.415027] [] sg_finish_rem_req+0x2b5/0x340 [ 33.421059] [] sg_new_read.isra.18+0x17d/0x3c0 [ 33.427264] [] sg_read+0x8bc/0x1490 [ 33.432517] [] ? __check_object_size+0x154/0x35b [ 33.438895] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 33.445534] [] ? fsnotify+0xee0/0xee0 [ 33.450960] [] ? avc_policy_seqno+0x9/0x20 [ 33.456817] [] do_loop_readv_writev+0x141/0x1e0 [ 33.463110] [] ? security_file_permission+0x89/0x1e0 [ 33.469838] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 33.476478] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 33.483115] [] do_readv_writev+0x5dd/0x6e0 [ 33.488971] [] ? vfs_write+0x530/0x530 [ 33.494482] [] ? _raw_spin_unlock+0x2c/0x50 [ 33.500428] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 33.507415] [] ? __fget+0x47/0x3b0 [ 33.512579] [] ? avc_policy_seqno+0x9/0x20 [ 33.518436] [] ? __fget+0x213/0x3b0 [ 33.523685] [] ? __fget+0x23a/0x3b0 [ 33.528934] [] ? __fget+0x47/0x3b0 [ 33.534444] [] vfs_readv+0x78/0xb0 [ 33.539606] [] SyS_readv+0xd9/0x240 [ 33.544855] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 33.551409] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 33.557963] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 33.564511] 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 [ 33.591363] RIP [] __free_pages+0x21/0x90 [ 33.597257] RSP [ 33.601288] Dumping ftrace buffer: [ 33.604811] (ftrace buffer empty) [ 33.608503] Kernel Offset: disabled [ 33.612095] Rebooting in 86400 seconds..