[ 18.427211] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.500907] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 20.688348] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.512487] random: sshd: uninitialized urandom read (32 bytes read, 112 bits of entropy available) [ 29.811447] random: sshd: uninitialized urandom read (32 bytes read, 120 bits of entropy available) Warning: Permanently added '10.128.15.203' (ECDSA) to the list of known hosts. [ 35.194135] random: sshd: uninitialized urandom read (32 bytes read, 126 bits of entropy available) net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 35.293668] IPVS: Creating netns size=2552 id=1 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" executing program executing program executing program [ 35.758402] kasan: CONFIG_KASAN_INLINE enabled [ 35.762828] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.775705] Dumping ftrace buffer: [ 35.779213] (ftrace buffer empty) [ 35.782904] Modules linked in: [ 35.786181] CPU: 1 PID: 3918 Comm: syzkaller775535 Not tainted 4.4.116-g014c901 #16 [ 35.789261] kasan: CONFIG_KASAN_INLINE enabled [ 35.798489] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.798490] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.815148] task: ffff8801d0463000 task.stack: ffff8801c4d20000 [ 35.821174] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 35.829403] RSP: 0018:ffff8801c4d279f0 EFLAGS: 00010a07 [ 35.834839] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b889b [ 35.842077] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 35.849314] RBP: ffff8801c4d27a00 R08: 0000000048000000 R09: 0000000000001e30 [ 35.856552] R10: 0000000000002100 R11: 1ffff100389a4f1c R12: 0000000000000004 [ 35.863788] R13: 0000000000000020 R14: ffff8801d0468000 R15: dffffc0000000000 [ 35.871025] FS: 00007f3d90495700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 35.879219] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.885066] CR2: 0000000020e94000 CR3: 00000001cbc48000 CR4: 0000000000160670 [ 35.892305] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.899544] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.906779] Stack: [ 35.908894] 0000000000000246 ffff8801d0468158 ffff8801c4d27a60 ffffffff825b88c1 [ 35.916855] ffff8801d0468170 ffffed003a08d02b ffffed003a08d02e ffff8801d0468168 [ 35.924822] dead4ead00000000 ffff8801d0468140 0000000000000000 0000000000000000 [ 35.932797] Call Trace: [ 35.935354] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 35.941814] [] sg_finish_rem_req+0x2b5/0x340 [ 35.947839] [] sg_new_read.isra.18+0x17d/0x3c0 [ 35.954038] [] sg_read+0x8bc/0x1490 [ 35.959280] [] ? __check_object_size+0x154/0x35b [ 35.965652] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 35.972284] [] ? fsnotify+0xee0/0xee0 [ 35.977703] [] ? avc_policy_seqno+0x9/0x20 [ 35.983557] [] do_loop_readv_writev+0x141/0x1e0 [ 35.989844] [] ? security_file_permission+0x89/0x1e0 [ 35.996564] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 36.003195] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 36.009826] [] do_readv_writev+0x5dd/0x6e0 [ 36.015678] [] ? vfs_write+0x530/0x530 [ 36.021183] [] ? sg_ioctl+0x29f0/0x29f0 [ 36.026776] [] ? __vfs_write+0x10b/0x450 [ 36.032456] [] ? __fget+0x20b/0x3b0 [ 36.037698] [] ? __fget+0x232/0x3b0 [ 36.042940] [] ? __fget+0x47/0x3b0 [ 36.048095] [] vfs_readv+0x78/0xb0 [ 36.053250] [] SyS_readv+0xd9/0x240 [ 36.058495] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 36.065045] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 36.071508] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 36.078049] Code: c6 9f 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 [ 36.104512] RIP [] __free_pages+0x21/0x90 [ 36.110395] RSP [ 36.113998] general protection fault: 0000 [#2] [ 36.114337] ---[ end trace 9e4e31f4dccf5bc9 ]--- [ 36.114340] Kernel panic - not syncing: Fatal exception [ 36.128656] PREEMPT SMP KASAN [ 36.132383] Dumping ftrace buffer: [ 36.135887] (ftrace buffer empty) [ 36.139565] Modules linked in: [ 36.142842] CPU: 0 PID: 3919 Comm: syzkaller775535 Tainted: G D 4.4.116-g014c901 #16 [ 36.151815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.161136] task: ffff8801d8964800 task.stack: ffff8801d8d78000 [ 36.167159] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 36.175390] RSP: 0018:ffff8801d8d7f9f0 EFLAGS: 00010a07 [ 36.181240] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b889b [ 36.188477] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 36.195804] RBP: ffff8801d8d7fa00 R08: 0000000048000000 R09: 0000000000001e30 [ 36.203043] R10: 0000000000002100 R11: 1ffff1003b1aff1c R12: 0000000000000004 [ 36.210280] R13: 0000000000000020 R14: ffff8801d99d0000 R15: dffffc0000000000 [ 36.217521] FS: 00007f3d90474700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 36.225713] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.231564] CR2: 00007f3d90473db8 CR3: 00000001cbc48000 CR4: 0000000000160670 [ 36.238804] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.246043] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.253287] Stack: [ 36.255404] 0000000000000246 ffff8801d99d0158 ffff8801d8d7fa60 ffffffff825b88c1 [ 36.263367] ffff8801d99d0170 ffffed003b33a02b ffffed003b33a02e ffff8801d99d0168 [ 36.271330] dead4ead00000000 ffff8801d99d0140 0000000000000000 0000000000000000 [ 36.279290] Call Trace: [ 36.281848] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 36.288317] [] sg_finish_rem_req+0x2b5/0x340 [ 36.294344] [] sg_new_read.isra.18+0x17d/0x3c0 [ 36.300541] [] sg_read+0x8bc/0x1490 [ 36.305785] [] ? __check_object_size+0x154/0x35b [ 36.312155] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 36.318788] [] ? fsnotify+0xee0/0xee0 [ 36.324210] [] ? avc_policy_seqno+0x9/0x20 [ 36.330063] [] do_loop_readv_writev+0x141/0x1e0 [ 36.336351] [] ? security_file_permission+0x89/0x1e0 [ 36.343082] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 36.349726] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 36.356362] [] do_readv_writev+0x5dd/0x6e0 [ 36.362213] [] ? vfs_write+0x530/0x530 [ 36.367720] [] ? sg_ioctl+0x29f0/0x29f0 [ 36.373310] [] ? __vfs_write+0x10b/0x450 [ 36.378989] [] ? __fget+0x20b/0x3b0 [ 36.384233] [] ? __fget+0x232/0x3b0 [ 36.389477] [] ? __fget+0x47/0x3b0 [ 36.394636] [] vfs_readv+0x78/0xb0 [ 36.399791] [] SyS_readv+0xd9/0x240 [ 36.405034] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 36.411582] [] ? finish_task_switch+0x1e7/0x4e0 [ 36.417867] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 36.424326] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 36.430868] Code: c6 9f 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 [ 36.457337] RIP [] __free_pages+0x21/0x90 [ 36.463218] RSP [ 36.467157] Dumping ftrace buffer: [ 36.470690] (ftrace buffer empty) [ 36.474376] Kernel Offset: disabled [ 36.477977] Rebooting in 86400 seconds..